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Problem Statement: I am using Aspen Utilities Planner (AUP) 2006.5. When I double-click on any model, I get an error saying *.auf file can not be found. If I click OK, it opens AUP 2006.5, but without a model. If I then go to File|Open, the browser is looking for files of type *.dtl. This should be files of type *.auf. How can I fix this file association?
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Solution: This problem is related to .auf file association and can be fixed by the following procedure:
1. In Windows Explorer select Tools-Folder Options?
2. Click the File Types tab and scroll down to the AUF entry:
3. Click the Advanced button:
4. Click Edit? and make changes to look like:
Keywords: File association
References: None
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Problem Statement: How to define fuel composition in FeedFuel block in Aspen Utilities Planner V8.0 ?
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Solution: Feed composition can be specified in Feedfuel block in Aspen Utilities V8.0, which enables user to calculate the required fuel properties such as molecular weight (MWout), lower heating value (CVout) and oxygen demand (OD).
To specify fuel composition,
1. Add a feedfuel block in the flowsheet
2. Double click Feedfuel block B1 to open the summary form
3. Change parameter CalculatePropsFromComp from No to Yes
4. Type in mass fraction of fuel composition. Note the components are predefined in Fuel component list. User could define additional components to the list using embedded Aspen Properties definition file.
Keywords: FeedFuel
References: None
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Problem Statement: OLE Automation access to LNG curves (including Hot Composite Curve)
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Solution: The LNG Exchanger operation (Object type LNGOp) has a Curves collection that allows access to HeatExchangerCurve objects for each of the sides of the exchanger, and a CompositeCurve property that gives access to the composite curve. However, in the current version of HYSYS the CompositeCurve property only gives access to the cold composite temperatures. Currently the only way to retrieve the hot composite temperatures is via a Backdoor method, this is illustrated in the attached Excel spreadsheet. Backdoor methods allow access to features not yet wrapped for access by normal OLE methods.
Additionally Backdoor access is used to report the Delta Temperature for each of the exchanger curves.
To use this example specify an LNG exchanger in the currently open case in cell D6, then press the Get Available Curves button to populate cell D9 with the available curves. Pick a curve from the drop down and then press the Get Curve Data button to report the data for the curve.
When linking Excel to HYSYS, the HYSYS type library must be correctly referenced to allow Excel to access HYSYS' functions. As supplied the spreadsheet is set up with a link to HYSYS version 3.1. If a different version of HYSYS is in use then Excel may report errors like: Method or Data Member not found, Type Mismatch, or RPC errors. These can often be solved by re-referencing the HYSYS type library. The procedure to do this is as follows:
Close all HYSYS and Excel instances, Open HYSYS and Excel. Go to the VBA editor. (Tools ... Macro ... Visual Basic Editor, or press Alt + F11). In the VBA editor go to Tools ...
Keywords: LNG, Composite Curve, Delta Temperature
References: s. If HYSYS #.# Type Library (where #.# is the version of HYSYS being used) is checked uncheck it and press OK, then go to Tools ... References again Find HYSYS #.# Type Library in the list, check it, press OK and close the VBA editor.
Note
The Knowledge Base examples are provided for academic purposes only and as such are not subject to the quality and support procedures of officially released AspenTech products. Users are strongly encouraged to check performance and results carefully and, by downloading, agree to assume all risk related to the use these examples. We invite any feedback through the normal support channel at [email protected].
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Problem Statement: How can I adjust air flow rate to meet desired value?
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Solution: In order to vary the flowrate of air in a stream, the air multiplier block provides a quick and simple mechanism for augmenting or decreasing the flowrate of air in a stream by a fixed factor, which is shown as below:
By introducing a fixed factor Multiplier, which in this case is set to 0.9, you can set it lower than 1 to increase air inlet, or vice versa.
Please be noted that there is a defect when using block AirMultiplier in Aspen Utility Planner V7.3, refer toSolution 133088-Aspen Utilies Planner Emergency Patch 2: Missing equation in Air Multiplier bloc, to fix the defect by clicking on following link:
http://support.aspentech.com/webteamcgi/SolutionDisplay_view.cgi?key=133088
Keywords: AirMultiplier, Multiplier, Air Flowrate, Adjust
References: None
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Problem Statement: How do I choose the correct step size when running Aspen HYSYS Dynamics?
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Solution: The step size is the time that passes before Aspen HYSYS calls a new calculation pass. Users are usually recommended to use the default of 0.5 sec. Generally speaking, reducing the step-size improves the accuracy. Aspen HYSYS solves equations using the fully implicit Euler integration method. The use of a small step-size is extremely important when dealing with fast processes or when the dynamic responses of the objects in the simulation are too different - resulting in stiff differential equations. There is a simple viewlet attached to thisSolution (Euler.exe) that illustrates the influence of the step-size in the integration of a differential equation. Be aware, however, that there is a trade-off between accuracy and simulation time.
The next question to ask is how to find the appropriate step-size for a model? You must choose the appropriate step-size by trial and error. Keep reducing the step-size until you don't notice appreciable differences in results. Usually, when we are dealing with standard operations like vessels, heat exchangers and columns, the dynamic responses are not that fast, so that larger time step sizes can be used. Use the largest step size that gives you similar results to small step sizes.
Note that, you can also adjust the calculation frequencies for individual unit operations. This can be useful to maintain dynamic accuracy at the same time as model execution rates if, for example, a process has a combination of vapour and liquid operations (e.g a gas plant with compressors and fractionation columns). Please seeSolution #109032 for more information.
Keywords: Integrator
References: None
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Problem Statement: How does a company rapidly deploy AspenTech's Process Engineering Tools across their enterprise without lengthy scripting and install procedure effort?
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Solution: BASF's IT Group has developed an innovative approach, based on Microsoft's SoftGrid technology, to rapidly deploy AspenTech's Process Engineering Tools across their enterprise without lengthy scripting and install procedure effort. The software resides on a dedicated server, and users are able to access the AspenTech engineering tools via their LANs / WANs at runtime.
The key difference versus other approaches (such as Citrix) is that SoftGrid technology leverages the computing power of the user's local PC, rather than loading up the server. In other words, the power of local computing without the headache of local software distribution and installation.
AspenTech is working closely with Mircosoft and BASF IT to offer this deployment approach to customers worldwide.
Read the Article
Innovation Watch
BASF Success in Rapid Deployment of aspenONE Process Engineering
by Rudolf Assmann and Dr. Axel Polt, BASF
View the Presentation
AspenTech Software Virtualisation BASF Engineering
Keywords: None
References: None
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Problem Statement: Assume that you have some thermal conductivity data from other sources for an equal volume mixture of EG and water and would like to use them to replace the values generated from the default correlations in HYSYS.
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Solution: The properties such as viscosity and thermal conductivity are calculated in HYSYS using default correlations that are independent of the property package used for the simulation. If you find the values of such properties reported in HYSYS are not good enough for your simulation and would like to replace them with the data you received from other source, you do so by taking advantage of HYSYS Tabular feature. Attached HYSYS file was set up to show you how this can be achieved for an equal volume mixture of EG and water mixture. If you want to repeat what do it yourself, here are the steps to follow:
1. Take EG and Water to make an equal volume mixture.
2. Specify the mixture pressure as 1atm and vapor fraction as zero, to get its normal boiling point temperature, mass density and molecular weight.
3. Attach the Critical Properties utility to the mixture stream to get its critical properties (Tc and Pc).
4. Use the values obtained in steps 2 and 3 to define a hypothetical component called 50/50 in a separate component list.
5. Attach the component list with the hypo component (50/50) to a new property package (it is not important which one, in your case. I picked the NRTL model in this example). I named it For 50/50.
6. View this new fluid package and go to the Tabular page.
7. Check the box to Enable Tabular Properties.
8. Press the + sign beside Options title on the left-hand side of the Tabular view to expand its selection list.
9. High-light All Properties which will open up a new window on the right-hand side.
10. Check the box for Thermal Coed(L).
11. Move to the left-hand side again to expand the view under Information. You should be able to see the property you just selected there.
12. Highlight Thermal Cond(L) under Information and press the button of Comp. Prop.Detail on the right bottom corner. This will lead you to the windows where you can specify your own data.
13. On the Table tab page of this new view, make sure you have the right units for temperature and thermal conductivity BEFORE putting in your own data. The data currently in this Table are taken from the HYSYS database. You can overwrite them with your own.
14. Once you have your own data specified here, press Regress button to complete the process.
This will allow HYSYS to use your own thermal conductivity data to replace those calculated by the default correlation model. As you can see, there are some work involved. But you only need to do this once and save your fluid package for further applications. Please note that if you decide not to repeat what I did, but just to use the fluid package I've already created, you still need to carry out steps 12, 13 and 14 to get your own data in.
Keywords: Thermal conductivity, Tabular, DOW, thermal fluid, heat transfer fluid, hypothetical component, transport properties
References: None
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Problem Statement: How do I model a valve that opens linearly between two values of a process variable?
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Solution: When modelling a system with pumps or compressors in Aspen HYSYS Dynamics, a surge control scheme could be used to protect pressure units under extreme flow conditions. Sometimes, however, it is desirable to manipulate a valve opening according to a specific range for a given process variable. To this end, a selector block can be used to map the range of a process variable to a particular valve opening range.
See the attached case wherein a selector block is used to implement such a scheme. The valve starts to open at a specified pressure, and opens linearly and gradually until full opening is achieved at a higher pressure. The selector block's parameters are tuned to map a pressure range of 4000 - 5000kPa to a valve opening range of 10%-90%.
Keywords: valve, opening, linear, selector, selector block
References: None
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Problem Statement: Why there is a temperature rise when the pump efficiency is specified as 100%?
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Solution: The pump calculation used within Aspen HYSYS assumes that the process fluid is incompressible (i.e. there is no change in the fluid density across the pump). In reality, there is a measurable change in density that occurs as the pressure increases, which results in the predicted temperature deviation. Consequently, when Aspen HYSYS calculates the outlet conditions for the pump based on the exit pressure and enthalpy, a small temperature rise will be observed, even when the pump efficiency is specified as 100%.
Keywords: pump, temperature, rise, efficiency
References: None
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Problem Statement: Dynamic
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Solution: In the attached HYSYS 3.0.1 case the mixer operation has a User Variable (Steady State and Dynamic) that creates a reference stream based on the mixer product stream. The reference steam is named [Stream Name]_
Keywords: Dynamic User Variable,
References: Stream User Variable
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Problem Statement: When opening Aspen HYSYS, the following message appears: Can not create Comsel.idx file ...
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Solution: This error appears to be related to the read and write access to the computer where Aspen HYSYS is installed.
The suggestedSolution is to obtain full read and write permission to the drive Aspen HYSYS is installed. Once Aspen HYSYS has been run successfully the first time, the comsel file will be created and then access rights can be removed if necessary.
Keywords: comsel, idx, cannot create
References: None
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Problem Statement: Care using ActiveCase.FlowSheet... in User Variables
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Solution: When referring to other objects on the same flowsheet as the stream / operation with the user variable, it is tempting to use (for example):
Dim mySprd As HYSYS.SpreadsheetOp
Set mySprd = ActiveCase.Flowsheet.Operations.Item(MySprdSheet)
However if the object the user variable is running from, is in a sub flowsheet this code will not work, because it is looking for a spreadsheet called MySprdSheet in the main flowsheet not the sub flowsheet. The way around this is to use:
Dim mySprd As HYSYS.SpreadsheetOp
Set mySprd = ActiveObject.Flowsheet.Operations.Item(MySprdSheet)
This will look for a spreadsheet called MySprdSheet in the same sub flowsheet as the object with the user variable.
Keywords: ActiveCase, ActiveObject
References: None
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Problem Statement: User wants to display the results of the calculations within the User Unit Operation (UUO) model in a read only manner.
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Solution: In order to display the user variable in a read only manner the Calculate only box located in Security tab has to be checked.
To activate the Calculate Only method the “Trigger Solver” box located in Attributes tab has to be checked.
Keywords: User Variable, Read only, Calculate only, Calculate method
References: None
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Problem Statement: Assume that you have some thermal conductivity data from other sources for an equal volume mixture of EG and water and would like to use them to replace the values generated from the default correlations in HYSYS.
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Solution: The properties such as viscosity and thermal conductivity are calculated in HYSYS using default correlations that are independent of the property package used for the simulation. If you find the values of such properties reported in HYSYS are not good enough for your simulation and would like to replace them with the data you received from other source, you do so by taking advantage of HYSYS Tabular feature. Attached HYSYS file was set up to show you how this can be achieved for an equal volume mixture of EG and water mixture. If you want to repeat what do it yourself, here are the steps to follow:
1. Take EG and Water to make an equal volume mixture.
2. Specify the mixture pressure as 1atm and vapor fraction as zero, to get its normal boiling point temperature, mass density and molecular weight.
3. Attach the Critical Properties utility to the mixture stream to get its critical properties (Tc and Pc).
4. Use the values obtained in steps 2 and 3 to define a hypothetical component called 50/50 in a separate component list.
5. Attach the component list with the hypo component (50/50) to a new property package (it is not important which one, in your case. I picked the NRTL model in this example). I named it For 50/50.
6. View this new fluid package and go to the Tabular page.
7. Check the box to Enable Tabular Properties.
8. Press the + sign beside Options title on the left-hand side of the Tabular view to expand its selection list.
9. High-light All Properties which will open up a new window on the right-hand side.
10. Check the box for Thermal Coed(L).
11. Move to the left-hand side again to expand the view under Information. You should be able to see the property you just selected there.
12. Highlight Thermal Cond(L) under Information and press the button of Comp. Prop.Detail on the right bottom corner. This will lead you to the windows where you can specify your own data.
13. On the Table tab page of this new view, make sure you have the right units for temperature and thermal conductivity BEFORE putting in your own data. The data currently in this Table are taken from the HYSYS database. You can overwrite them with your own.
14. Once you have your own data specified here, press Regress button to complete the process.
This will allow HYSYS to use your own thermal conductivity data to replace those calculated by the default correlation model. As you can see, there are some work involved. But you only need to do this once and save your fluid package for further applications. Please note that if you decide not to repeat what I did, but just to use the fluid package I've already created, you still need to carry out steps 12, 13 and 14 to get your own data in.
Keywords: Thermal conductivity, Tabular, DOW, thermal fluid, heat transfer fluid, hypothetical component, transport properties
References: None
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Problem Statement: We are using Aspen Properties Toolkit to access Aspen Properties. It requires an Aspen Properties License to run but after we are done using Aspen Properties we want to release the license without having to wait the 5 minutes for it to be returned. Is there a way to release the Properties License using Aspen Properties Toolkit?
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Solution: To return the license, use PPEXEC_APCLOSE to close the current Process Definition File.
     CALL APCLOSE(CALL_RTLAYL, CALL_SELF_EXIT)
Where
CALL_RTLAYL is an integer and should be set to 1 to detach from the license manager.
and
CALL_SELF_EXIT is an integer and should be set to 0. CALL_SELF_EXIT set to 1 will detach from the User Interface if connected
Keywords: None
References: None
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Problem Statement: What is NBOPST?
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Solution: NBOPST is the bead vector for the property methods used. It is used in many user subroutine calls.
The Aspen Properties Toolkit
Keywords: nbopst
subroutine
fortran
References: Manual p.3-24 has a description of NBOPST:
One of the arguments to the Aspen Properties monitors and flash utility is NBOPST, the property methods array. NBOPST contains pointers and codes that determine physical property methods, models, and options used to calculate any requested properties. The Properties | Specifications | Global sheet specifies this information.
You must use NBOPST in the calling sequences for Aspen Properties monitors and subroutines. (See Property Calculations, page 3-4.) The six elements of NBOPST correspond to the entries in the Properties | Specifications | Global sheet, as the following table shows.
NBOPST
Element
Properties Specifications Entry
Description
1
Property Method
Property method name
2
Henry Components
Henry's component-list ID
3
Chemistry ID
Electrolytes chemistry ID
4
Use True Components
Electrolytes equilibrium calculation approach:
selected = Use true component approach
cleared = Use apparent component approach
5
Free-Water Method
Free-water phase property method
6
Water Solubility
Method for calculating the K-value of water in the organic phase
Note: Descriptions in this table are for your information only. Application programs should not change NBOPST.
The NBOPST array is stored in labeled common PPUTL_OPSET as OPSET_NBOPST(6). Include the following statement in any subroutine that calls an Aspen Properties monitor or the subroutine FLSH_PFLASH:
#include pputl_opset.cmn
The PPUTL_OPSET common should only be used in Properties Toolkit. It should not be used inside Aspen Plus since it is not initialized. For Aspen Plus, NBOPST is passed in the argument list of most subroutines which need to do property calculations. It is also automatically passed to in-line Fortran for Calculator blocks, Design Specifications, etc.
In version 2004.1 and higher, you can call the subroutine PPUTL_GOPSET from routines in Aspen Plus. NBOPST and the NAME of the property method, are output.
integer nbopst(6), name(2)
call PPUTL_GOPSET ( NBOPST , NAME )
This routine can be used in Property routines to get NBOPST in order to call Property Monitors.
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Problem Statement: You do not have permission to view databank content in this database using Aspen Properties Database Manager.
You may also see a launch error from the application (ie., Aspen HYSYS) using the databank: ”Some of the registered APED databases are not accessible. You can ignore this message if you are not using Aspen Properties or these databases in this case.
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Solution: This issue could occur if the custom database has Extra Security, which verifies the Security String name with the Company Name on the license file, and it does not match.
Steps to view the Database Security String using the Aspen Properties Database Manager
1. Launch the Aspen Properties Database Manager.
2. Right click on Aspen Properties Databases and select All Tasks -> View Database Security String
Steps to view the Company name on license file using the SLM License Profiler
1. Launch the SLM License Profiler on the client machine.
2. Select the License Server from the License Server drop down.
3. Click the Load Information button.
If the Company Name on the license file does not match with the Database Security String then you will need to create the database with correct Company name as used in your license file.
NOTE: If due to some reason you cannot modify your database then please contact AspenTech Support to assist you further with this issue.
Keywords: APED Security String
Database
Custom
Aspen Properties
References: None
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Problem Statement: Why, when I try to register an extension do I get the message Error-DLL function DllRegisterServer failed (Error -2147467259)?
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Solution: When HYSYS registers an extension, it needs to make some changes to the system registry. On Windows NT, 2000, and XP machines you require Administrator privileges in order to make registry changes.
Hence if you receive this message you will need to ask your IT support group to allow you administrator privileges or to register the extension for you.
Keywords: register, extension, administrator priveleges, DllRegisterServer failed, -2147467259
References: None
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Problem Statement: The pressure profile of a column (top and bottom pressure) must be specified by the user. Usually, those values are specified using the Input Experts and they can be changed in the Design tab, Connections page of the column view. In some cases, those pressure specifications should be changed due to pressure changes in the main flowsheet. There should be a way of linking the top and bottom column pressures to the main flowsheet, so that, those values can be changed automatically.
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Solution: Differently than other operations in Hysys, it is not possible to specify the product streams of a column and expect that Hysys will calculate the feed streams. However, the pressure specification doesn't follow this rule and it is possible to specify the pressure of top and bottom streams and Hysys will use those values to fix the pressure profile of the column. The set operation could be used to calculate the top or bottom pressure values as a function of the feed pressure, for instance.
Keywords: Column, Pressure, Profile, Specifications
References: None
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Problem Statement: Experimental data set has been used in a Data Regression (DRS) case. Once the DRS has been run and results obtained, I would like to get a plot which includes both the experimental data and the property/parameter for which the DRS has regressed its elements.
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Solution: In order get the plot which includes the experimental data and the property affected by the DRS. Switch from Data Regression mode to Property Analysis mode. At this point there are two options to run the Analysis:
- Interactive Property Analysis. It is found on the Home ribbon in the Properties environment. From here property calculations and plots for pure components (such as vapor pressure) and binary Txy and Pxy diagrams can be developed (other options like residue curve maps and ternary diagrams are also available).
- Property Analysis. It is created in Properties Environment | Analysis folder. This option provides more flexibility in terms of the properties to plot.
o First step is to create a PROP-SET which includes the property to be analyzed. Under Properties | Property Sets, create a new prop-set with the property, choose the units if appropriate and on Qualifiers tab, select the phase (if required).
o Go to Properties Environment | Analysis, create a Generic case. Specify the components flows, on Variable tab, specify the operating conditions, and then under Adjusted Variables the variable to be varied and the range need to be specified. On Tabulate tab, the prop-set created in the previous step is added.
Once you run the Analysis and get the Results plot, you can then go to the Data folder,
select the Data Set and on the Home Ribbon go to Plot. The last step is to merge the two
plots into one. This option is available on the Plot | Design ribbon:
Keywords: Experimental data
Property Analysis plot
Merge plot
References: None
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Problem Statement: How do I resolve Error 1311 in Aspen HYSYS when clicking on the Aspen Basic Engineering (64-bit) drawing editor?
Error 1311: Source file not found.
Aspen HYSYS was installed from a web download link running on Windows 7 and the ASW was not installed. Aspen HYSYS connected to Aspen Basic Engineering (ABE) and ABE opens successfully, but clicking ABE drawing editor created the error 1311.
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Solution: The knowledge base describes how to fix the 1311 error message. Error 1311 occurred because an Emergency Patch (EP) was installed without first installing the cumulative patch (CP). Please follow the installation steps to properly install the patches below:
1. From add/removed program, uninstall HYSYS V7.3 and then reboot the system.
2. CP or EP cannot be uninstalled without uninstalling the entire HYSYS.
3. Then check to make sure ABE is running correctly
4. Cumulative patches should always be installed before emergency patches. For HYSYS V7.3,
Process Modeling (Aspen HYSYS) V7.3 Cumulative Patch 2 - December 2011 (133417)
A A A A A A A A A A A is currently the only CP2 available to install. There is no CP1.
5. After installing CP2, you can install any EP or install or in order (e.g. EP1 to EP6).
6. In addition, if you are installing HYSYS on Windows 7, you cannot just start the executable for EP6. You must change the path to C:\Program Files (x86).
Keywords: Process Modeling (HYSYS), ABE, drawing editor, patch, CP2, error 1311, source file not found, and EP6
References: None
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Problem Statement: What is the optional checkbox for ‘Use Ft’ which appears when modelling Heat Exchanger End Point Model.
Design--> Parameters--> End Point Model
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Solution: Aspen Hysys Heat Exchanger Design (End Point Model) solves with the equation
Q = UA * Ft * LMTD
where
Q = duty
UA = overall heat transfer coefficient times area
Ft = Ft correction factor
LMTD = Log Mean Temperature Difference.
The Ft correction factor is the log Mean temperature difference correction factor and it is calculated from the exchanger geometry (shell and tube configuration) and inlet/outlet temperatures. It is used if the flow pattern in the exchanger is not completely counter current or co current because the standard LMTD is based on pure counter current or co current flow. For the equation of how the Ft correction factor is calculated see KB 109638.
When the End Point model is selected, the option to have Ft correction factor calculated can be selected by checking the “Use Ft Factor checkbox which will appear on the Design/Parameters page, as well as entering the number of shell and tube passes. The Ft factor will then be calculated from this information and the results reported in the Performance tab/ Detailed Performance.
Values of Ft correction factor less than 0.8 are generally unacceptable because the exchanger configuration is inefficient. The heat exchanger will be solved with results available but issue a warning. See KB 109418
Keywords: Ft correction factor, LMTD, End Point, Shell and Tube Heat Exchanger
References: None
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Problem Statement: Why it is not easy to replace the Aspen HYSYS PFD icon with my custom icon?
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Solution: It is difficult to replace the Aspen HYSYS PFD icon with the custom icon because the PFD icons in Aspen HYSYS interact with other PFD objects (i.e. streams). As the custom icons are just an image (and not programmed for interaction with other objects) custom icons generated by the user are unable to interact with other objects. If you want to have some other image icon instead of the regular PFD icon for the presentation purpose, there is a work around:
1. Hide the default icons on the PFD.
2. Right click on the PFD and select insert object.
3. Select the desired image file (i.e. *.bmp, *.gif, *.jpg).
Keywords: PFD, custom, icon, interact, stream, hide, show, object, user, image,
References: None
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Problem Statement: What is the Master Component List and what is it used for?
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Solution: The Component Manager always contains a Master Component List that cannot be deleted. The Master Component List contains every component that has been added to all component lists in a HYSYS case. When you add components to any component list, they are automatically added to the Master Component List. Also, if you delete a component from the master, it is deleted from any other component list that is using it.
The components listed in the Master Component List are the components that will be displayed in the HYSYS Workbook, so you may see more components than you were expecting here if you have more than one component list in your case.
Again, note that the Master Component List cannot be deleted.
Keywords: Master, Component, List
References: None
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Problem Statement: Which Correlation Method is being used in the Pipe Sizing Utility?
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Solution: The Gregory-Aziz-Mandhane correlation method (horizontal pipes only) is being used in the Aspen HYSYS Pipe Sizing Utility. Please refer to the Aspen HYSYS Operations Guide section 5.2 for flow maps.
Keywords: Pipe Sizing utility; correlation
References: None
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Problem Statement: What is a temperature cross? How can I get rid of a temperature cross error in a heat exchanger?
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Solution: A temperature cross occurs when the cold side of the exchanger becomes warmer than the hot side of the exchanger, thereby causing heat to flow from the cooler fluid to the warmer fluid. Graphically, the temperature cross can be seen on the Performance | Plots page of the heat exchanger view. If you create a Heat Flow vs. Temperature plot for the heat exchanger you will note that the shell side and tube side line cross.
To fix this problem, you need to change inlet or outlet temperature(s) so that the temperature cross does not take place. In general, increasing the hot side outlet temperature or decreasing the cold side outlet temperature is a good way to eliminate a temperature cross. Alternatively, you could allow for heat leak into the process by opening the heat exchanger view and activating either the Extremes or Proportional radio button near the top right corner of the window. This will allow for an exchange of heat from the ambient in order to match the product temperatures from the heat exchanger without compromising the heat balance. If this is not a feasible temperature from a process perspective, you will need to examine the inlet conditions and perhaps consider some inter-stage heating/cooling.
Keywords: heat, exchanger, temperature, cross
References: None
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Problem Statement: What tolerances does the Recycle operation use when it is connected to Energy streams?
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Solution: When connected to energy streams, the Recycle operation uses an absolute internal tolerance of 0.1 kW. (NOTE: kW is the HYSYS internal unit for energy). The tolerance sensitivity multiplier used is Enthalpy.
Hence, for the default sensitivity of 10 the overall tolerance used is 1 kW (i.e. 10 x 0.1). So the recycle will continue solving until the inlet and outlet stream heat flows match within 1 kW.
Keywords: Recycle, Energy, Sensitivity, Enthalpy
References: None
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Problem Statement: What is auto-connect mode on the PFD and why would I use it?
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Solution: This mode in the PFD, introduced with HYSYS 3.0, will significantly increase the speed of building HYSYS models.
In Auto Connect mode, when Unit Operations are installed in the Flowsheet, the Inlet and Outlet streams are automatically attached.
By selecting a stream in the flowsheet and then adding a new operation, the operation will be connected to the currently selected stream and the outlet streams will automatically be attached. In this mode, operations can also be inserted between connections by selecting the stream to drop the operation onto, which will cut the stream into two. In this mode, operations can be added and connected without ever having to actively insert a stream into the Flowsheet.
Keywords: PFD Auto connect mode, PFD Auto-connect mode, new 3.0 features
References: None
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Problem Statement: Can I set up spreadsheet imports and exports via Automation?
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Solution: Yes, the attached VBA code example will add a spreadsheet to the currently open case then set up an import of the temperature of stream 1 into cell A1. It then writes a formula into B1 such that B1 = A1 + 10, and exports this to the temperature of stream 2. [Make sure that stream 2 doesn't already have a specified temperature to avoid a consistency error.]
The code is set up to be run from VBA (e.g. in Excel) but also includes the line necessary to link to the active case in the HYSYS Macro Language Editor.
Sub Main()
'
'Description: Simple Example of adding a spreadsheet, importing a value, adding a formula
' and exporting a value
'
' Imports a temperature from stream 1 in the current case, and exports it to stream 2
'
' In Excel VBA Requires HYSYS type library to be set under Tools ...
Keywords: None
References: s
'
'Declare Variables
|
Problem Statement: What are the steps required to create a user variable in Aspen HYSYS?
|
Solution: In this example, the basic steps required to create a user variable in Aspen HYSYS are outlined:
1) set user variable name and attributes
2) select appropriate VB subroutine
3) enter key coding elements in Visual Basic (VB) subroutine
Load the attached case uservartemp.hsc in HYSYS and open property view for stream 1. Select Worksheet | User Variables pagetab, and note the existing user variable UserTempInC. This user variable has been designed to show the stream temperature in degrees Celcius. Next, select the user variable and click the Edit the Selected User Variable button to view the VB code. In the ensuing window that appears, note that the user defined name and tag are entered as UserTempInC, and the selected subroutine is PostExecute (i.e. execute the routine after the current stream is flashed).
Three basic steps are demonstrated in the subroutine:
i) clear the current content in the value cell of the user variable
ii retrieve the necessary stream information for user calculations
iii) update the value cell with new value.
All three steps indicated above are clearly commented in the embedded VB code.
Keywords: user, variable, example, sample
References: None
|
Problem Statement: It may sometimes be required to obtain the solubility of a compound in different solvents based on the property parameters retrieved from the property data base. This means that experimental data to carry out regressions may not be available. This technical tip document describes the procedure to carry out such task.
In this example the procedure for obtaining the solubility of the compound Pyridine (C5H5N. ) in different solvents is described.
|
Solution: Since there is no data for regression, then the Excel file Regression.xls will not be required and the Calculation.xls will be used for this task. The following steps are required for this purpose (administrative rights will be required for the following modifications):
1. Delete nrtl-sac_130_solvents_43_excipients.aprpdf from the installation folder C:\Program Files (x86)\AspenTech\Aspen Solubility Modeler V8.6\NRTL-SAC
2. Open NRTL-SAC_130_Solvents_43_Excipients.aprbkp. Go to Components | Specifications | Selection. For Component ID, DRUG and SOLID, change Formula from C9H8O4 to C5H5N. This change will make DRUG represent Pyridine
(take note: It is advisable to keep a copy of the NRTL-SAC_130_Solvents_43_Excipients.aprbkp file before any modifications and keep the copy in a safe location in case it is needed).
3. Go to Properties | Parameters | Pure Component, delete the parameter XYZE-1. This will delete the existing parameters for DRUG (e.g. Aspirine) determined from Regression.xls and forces the parameters for Pyridine to be used (retrieved from the databank NRTL-SAC).
4. Save NRTL-SAC_130_Solvents_43_Excipients.aprbkp and quit.
5. Open Calculation.xls. This may take a few minutes for updating the parameters and generating nrtl-sac_130_solvents_43_excipients.aprpdf. Do not do anything else while waiting.
6. Once Calculation.xls is open, go to the sheet for Solubility in Solvents. It shows the solubilities of the drug (e.g. Pyridine in this example) in selected solvents. These solubilities values should be different from those when the drug was selected to be Aspirine (default software selection).
Keywords: Aspen Solubility Modeler, calculation.xls, calculation only
References: None
|
Problem Statement: Is it possible to create performance curves for different inlet guide vane positions for an expander?
|
Solution: New in Aspen HYSYS 2006.5, separate performance curves can be entered for each inlet guide vane (IGV) position for the expander operation. This functionality is similar to that available in the compressor operation in previous versions of Aspen HYSYS.
Keywords: expander, inlet, guide, vane, IGV, position, curve, curves, performance
References: None
|
Problem Statement: How can I rename the new hypothetical I added (the default name is in black, not red)?
|
Solution: This happens when you add a new hypothetical component to a pre-existing group of hypotheticals created using the oil manager.
To avoid this problem: first add a new hypothetical group, then add a new hypothetical component to that. You should then be able to change the new hypothetical's name.
Keywords: Hypothetical, Oil Manager
References: None
|
Problem Statement: Stream properties are left blank or show <empty> when queried in simluation.
|
Solution: Install the MSXML parser. It can be obtained from 'http://www.topxml.com/parsers/#Microsoft%20Parsers' or from 'Support.Microsoft.com'
Make sure the following files are installed and registered in the folder C:\Program Files\Common Files\Hyprotech:
datasvr.dll
corrman.dll
hyphys.dll
dataview.ocx
userproperty.dll
gasprops.dll
rvpprops.dll
petroleumprops.dll
msgrouter.dll
blackoilprops.dll
dbrprops.dll
correlationregistry.xml
The following files might be found under C:\Program Files\Common Files\Hyprotech\Petroleum:
rvpprops.dll
petroleumprops.dll
This behavior is normally seen on application servers. All of the files listed above are installed and registered with the normal Aspen HYSYS installation routine.
If you have a normal standalone installation, please re-run the Aspen HYSYS setup program.
Keywords: Correlation, properties, stream, XML, HYSYS, empty, <empty>
References: None
|
Problem Statement: How are slug flow properties calculated in the HYSYS pipe segment?
|
Solution: See the attached documents for a detailed explaination on how slug flow properties are calculated in the HYSYS pipe segment.
Note: There are two places you can view the flow regime.
a. On the Performance Tab (of Pipe) ll Slug Results page ll Status column
b. On the Performance Tab (of Pipe) ll Profiles Page ll View Profile button ll Flow Regime column
If the user changes the correlation on Design|Parameters tab, then a different flow regime will appear if the correlation uses a flow regime map. For example, if user choose the Duns and Ros, then this column (b above) on the profile may change to Slug Flow.
The Status column (a above) on the Performance|Slug Results page is not the flow regime predicted by the correlation (Design|Parameters). This is the flow regime predicted by the calculation designed on the Slug Options tab. This is a separate stability calculation from the pressure drop correlation.
Keywords: Slug Flow; Pipe Segment
References: None
|
Problem Statement: I selected Show sub-Flowsheet Objects, how do I hide them again?
|
Solution: The Show sub-FlowSheet Objects command displays all sub-flowsheet objects (streams, unit operations, tables, text etc.) onto the Main Flowsheet PFD. In this way, all sub-flowsheet streams and operations can now be viewed and accessed from the main PFD without entering the sub-flowsheet environment. To hide sub-flowsheet objects displayed in the main PFD, object inspect the tip of any sub-flowsheet stream connected to the main flowsheet. The tip of the stream will have a small square visible. Upon object inspection, the Hide sub-FlowSheet Objects option will appear which, once selected, will hide all associated sub-flowsheet objects.
Keywords:
References: None
|
Problem Statement: How do I show stream / operation tables on the PFD?
|
Solution: On the PFD Right click (Object Inspect) on the object (stream / operation) of interest then choose the 'Show Table' menu entry. This will place a table on the PFD somewhere near the object.
The table contains a set of default properties. By double clicking on the PFD table another window appears where the properties that are displayed in the table, and the appearance of the table can be customised.
If the object already has a PFD table then the 'Show Table' object inspection menu item is replaced by a 'Hide Table' entry. Another way to remove the table is to select it and press Delete (or right click and choose 'Hide Table'].
Keywords: PFD Show Table
References: None
|
Problem Statement: How do I do a depressurization model of a vessel or pipe line that has a leak in it?
|
Solution: To model a leak, you will want to use the General (Choked Flow) valve equation, and specify the Av coefficient, which is the orifice area (leak area). When using SI units, the Av is in m^2 and for Field units, Av is in ft^2.
Do not forget to use an appropriate Isentropic Efficiency value: for liquid filled systems, use 40% - 70%. For gas filled systems, use 87%-98%. If you have a two-phase system, you can use a value in between the two ranges, e.g 80%).
Note: In the attached sample case, the example was created using HYSYS 3.1, using the dynamic depressuring utility, which is the new version of the original depressuring utility. When using this sample case in HYSYS 2004, you will be asked if you want to update to use the new template. You can select Yes or No. If you select Yes, you will be switched over to use the new template from HYSYS 2004.
Keywords: Depressuring, leak, depressurization
References: None
|
Problem Statement: Customer gets the following error when he attempts to run Aspen FCC 11.1:
Error in ConnectServer(), module
Com2Dcom. Error message:Unable to
load simulation engine. License check
out error.
Cause:
The Aspen Plus license was not found when attempting to connect to an Aspen RXfinery flowsheet.
|
Solution: Check to make sure that the license server or the license file has been selected properly. See the Licensing section on page 2-8 of the installation manual for more information.
Check to make sure that the licenses for Aspen Plus, Aspen Plus EO Optimizer, and the Aspen RXfinery application licenses have been entered into the license server or are located in the license file. See the Licensing section on page 2-8 of the installation manual for more information.
Check your system for files which may have future date stamp. If so either remove the files or use a program such as touch to restamp the current date on these files.
Make sure the clock is set to correct date and time.
Keywords: ConnectServer
Com2Dcom
Rxfinery
Aspen FCC
License check out error
References: None
|
Problem Statement: Automation example - Produce a list of all HYSYS units and unit types in Excel
|
Solution: The attached Excel spreadsheet displays the units in the currently open HYSYS case. It has two modes
All Details: Lists All possible units for each of the variable types, along with conversion factors from HYSYS internal calculation units
Just Display units: Lists only the units currently being used in HYSYS
Saved with a HYSYS 3.2 Type Library reference - For troubleshooting advice on common HYSYS / OLE Automation errors see KnowledgebaseSolution #112361.
Keywords: Units, Display Units, unitconv.xls
References: None
|
Problem Statement: The Aspen Utilities product can't be found on the AspenOne 2004 Update 1or on the aspenONE 2006 installation DVDs
|
Solution: Normally, the engineering suite products can be found on DVD#6. There were some delays and Aspen Utilities was not included on the aspenONE 2004 update 1 and 2006 installation DVD's.
Currently, the latest version of Aspen Utilities is available on the aspenONE 2004 Update 2 installation DVD's on DVD #6. In this version, Aspen Utilities was replaced by a new product called Aspen Utilities Planner.
There will be no version 2006 for Aspen Utilities Planner, however the next version is planned for release sometime in calendar year 2008
Note: Aspen Plus must be installed for Aspen Utilities Planner to work properly.
Keywords: Aspen Utilities, Aspen Utilities Planner, aspenONE, installation, 2004.1, 2004 update1, 2006
References: None
|
Problem Statement: The scoop on tray efficiency.
|
Solution: This article is intended to shed some light on tray efficiency and how to account for it in your model. It clarifies the different methods used for accounting for efficiency, their corresponding characteristics and their effect on the simulation model accuracy.
Keywords: column, tray, efficiency, murphree, amine, amines, distillation, section, CO2, H2S, dynamics, steady state, SS
References: None
|
Problem Statement: I just received my HYSYS 3.1 package. How do I install it?
|
Solution: The HYSYS 'Get Started' guide will outline the different installation and licensing options available to you. The HYSYS 'Get Started' guide is located on the Root of the HYSYS 3.1 products CD.
Keywords: HYSYS 3.1; Installation; Standalone; Network
References: None
|
Problem Statement: How to find a reference citation for the pure and binary parameters that can be retrieved in Aspen Plus / Properties and NIST database?
|
Solution: There are two ways to retrieve the citations for pure components and binary parameters from the Aspen Physical Properties Databases.
1) From Aspen Properties Database Manager
· From the desktop click Start | All Programs | AspenTech | Process Modelling V8.6 |Aspen Properties and launch Aspen Properties Database Manager.
· Click on the database APV86 | Select compounds.
· Click on Find Compounds and perform a search by CAS number, component name or alias, molecular weight, boiling point or molecular formula.
· After having selected the compound you can see in which databases the compound is included, and export the molecular structure to a .mol file.
· If you click in Properties and Parameters | Pure you could see which parameters are included in the databanks.
· Click on the parameter you wish to know the reference, and if there one available it would appear on the citation column. Click on the reference column to view it in the bottom pane.
· You can verify the same information for the binary parameters. Here is an example of built-in NRTL binary parameters for the pair Benzene-Toluene obtained from the databank VLE-IG.
You can repeat the same procedure for the different databanks in the Database Manager for comparison purposes.
2) From Aspen Properties
· For pure component parameters, after you have clicked on Retrieve Parameters, you can review the values and click on each value to find out which database they were retrieved from.
· For binary parameters, select the NRTL-1 tab and locate the pair you want to consult. Here you can find the source from where the parameters were retrieved.
· To find the regression information for this component pair, click on Regression Info at the bottom of the window and you can consult the range of validity for these parameters.
3) From NIST Thermo Data Engine.
With the NIST TDE tool you can have access to experimental data used to regress the thermodynamic parameters. To evaluate your compound you need to:
· Click on the NIST button from the home ribbon. On components to evaluate select Pure or Binary mixture for the property data you wish to evaluate. Then click on Retrieve data.
· You will see a list of all the parameters retrieved from NIST. Click on the list of parameters you would like to review and then click on Save Data, if you fail to do so you’d need to re-evaluate them. When prompted, select all the parameters you wish to save.
· When you save the data, you can also choose which set of data to save and to save its uncertainty. You can review this data later from the tab DATA
· If you are evaluating pure component parameters, on the TDE Pure Results TAB, click on each parameter and you will have a more detailed description on them, including the experimental data.
Keywords: NIST, pure components, binary parameters, Aspen Properties Database Manager, reference citation.
References: None
|
Problem Statement: When you use the Generate Data option in Data Regression to generate for example TPXY data, the generated data does not show up on the Data sheet in the Properties | Data form.
|
Solution: The Generated Data is created during the Data Regression run; therefore, it cannot be displayed in the Data sheet Input form. Simply run the Data Regression case and review the results.
Keywords: Data Regression
Generate Data
Aspen Plus
Aspen Properties
References: None
|
Problem Statement: How do I use OLE to attach multiple feed and product streams to unit operations which can accept them (such as the tee, balance, separator, etc.)?
|
Solution: The Add method of the Feeds Collection is used to add multiple feed streams to a unit operation object one at a time. For example, if hyMix refers to a Mixer unit operation object and hyFeed1 and hyFeed2 refer to material stream objects, the following syntax would add the material streams as feeds to the mixer.
hyMix.Feeds.Add hyFeed1
hyMix.Feeds.Add hyFeed2
The same is true for the Products property of unit operations which can have multiple products (for example Tees). For example,
hyTee.Products.Add hyProduct1
hyTee.Products.Add hyProduct2
The text between the dashed lines is a HYSYS macro which demonstrates the above. To use the macro, copy the text from between the dashed lines and paste it into the HYSYS macro language editor.
Sub Main
'This macro assume an active sheet which has the following streams: Feed1, Feed2, Product Set hyCase = ActiveCase
Set hyFS = hyCase.Flowsheet
Set hyOpers = hyFS.Operations
Set hyFeed1 = hyFS.MaterialStreams(Feed1)
Set hyFeed2 = hyFS.MaterialStreams(Feed2)
Set hyProduct = hyFS.MaterialStreams(Product)
'Add a Mixer named Mix-100
hyOpers.Add (Mix-100, MixerOp)
'Set an object reference to the Mixer
Set hyMix = hyOpers.Item(Mix-100)
'**Add feed streams to the Mix-100 (must be added one at a time, can't use an array of streams) hyMix.Feeds.Add hyFeed1
hyMix.Feeds.Add hyFeed2
hyMix.Product = hyProduct
End Sub
Keywords: Feeds Products Collections Add Method
References: None
|
Problem Statement: The FRI tray rating utility allows only Sieve trays; how can I choose a different kind?
|
Solution: While the FRI Tray Rating utility allows for an FRI sieve tray only, the Tray Sizing utility allows for several different types of internals (i.e. sieve, valve, packed, bubble cap, chimney and sump).
Keywords: Internals, tray type, sieve, valve, packed, bubble cap, chimney, sump, tray rating, tray sizing, utility
References: None
|
Problem Statement: Is it possible to copy a spreadsheet operation from one case to another?
|
Solution: Although the operation itself can be copied, all logical connections will be lost when the spreadsheet is pasted into a new case, unless the referenced objects are also copied into the same case. Otherwise, since Aspen HYSYS does not use object names to reference the spreadsheet connections, only the original cell VALUES will be maintained (even if objects with the same names happen to exist in the new case).
If it is known beforehand that a given spreadsheet may be required in multiple cases, it is possible to use the script manager to generate a generic script that can then be used to re-create the spreadsheet connections. Since this scripting method is dependent solely on object names, a script thus generated can be used in any case where the referenced object names exist.
Keywords: spreadsheet, connections, copy
References: None
|
Problem Statement: This knowledge base article provides an overview of FIXA option in CMAN table.
|
Solution: FIXA is a Plant Scheduler simulator option found in CMAN (FIXA) .It can be set to YES or NO. When set toYES, the simulator does not move fixed activities. An activity is known to be fixed if its hierarchy level in MAKI (LEV) is greater than the fixed level in HIER (FIX, LEV).
As an example, on the planning board, if the user drags a non-fixed activity and drops it on top of a fixed one, the dropped activity will be scheduled by the simulator after the fixed one. And, if there are other fixed activities after that, the simulator will schedule it at the first time where it can fit without moving a fixed activity. In simple terms, simulator determines the actual start (AS) time for each activity so that no activity overlaps. The activities are processed in scheduled start (ST) time order. If any activity overlaps, it is scheduled to start (Actual Start) at the end of the one it is overlapping and the Scheduled start (ST) sequence is preserved.
The most common fixed activities are downtimes but, the user can fix production activities by raising their hierarchy levels. FIXA is not enabled on facilities with embedded shutdowns.Â
With FIXA on, the Actual Start for the fixed activities is determined first. Once the fixed activities have their Actual Starts set, then the un-fixed activities are processed in Scheduled Start (ST) order.
There may be situations when the users may move activities on the Planning Board. Also, a macro can be used to move activities with command like M RESCHE, which is the command that runs when a user drag-n-drops. These actions can change the schedule and activities scheduled start (ST) times. Then simulator runs and determines the earliest Actual Start (AS).
Keywords: None
References: None
|
Problem Statement: Why does the status bar on the Deposition | Methods page of my pipe segment indicate Not Calculated?
|
Solution: As in the figure at the bottom of thisSolution document, the status bar on the Deposition | Methods page the pipe segment may indicate Not Calculated for a variety of reasons:
1. The stream or associated pipe segment does not have enough information to run.
2. The ProFES wax calculation method does not have sufficient information to run.
3. The Do Deposition Calcs checkbox has not been activated.
Keywords: wax, deposition, pipe, segment, ProFES
References: None
|
Problem Statement: When one opens and runs the Regression.xls (Solubility Modeler Analysis) file from a folder which contains also the Calculation.xls file could create some conflicts on the modified NRTL-SAC_130_Solvents_43_Excipients.aprbkp (Aspen Properties file) generated. Usually, when you use firstly the Regression.xls file and then the Calculation.xls file, an error message appears on the screen.
|
Solution: In order to use the Calculation.xls and Regression.xls files, since these cannot be used within the same folder and using the same Aspen Properties file, one should copy the Aspen Properties file and paste it in a different folder with one of the respective Microsoft Excel file. For instance:
1. Create a new folder called ‘Calculation’ and a second one called ‘Regression’.
2. Within the ‘Calculation’ folder, cut and paste the Calculation.xls file and copy and paste the Aspen Properties file, so inside this folder you should have the following files:
3. Then cut and paste all other files to the ‘Regression’ folder:
4. If one wants to use the Aspen Properties file results obtained from the Regression.xls file, one should copy first the file to the Regression folder, then run simulation and when you finish then copy Aspen Properties file to calculation folder and use the Calculation.xls file. One cannot use it in the same folder using the same Aspen Properties file for both Excel files.
Keywords: Solubility Modeler error, Calculation.xls, Regression.xls.
References: None
|
Problem Statement: There is a way to copy data from tables. This
|
Solution: answers if there is a way to copy graphs/charts.
Solution
Let's take a standard screen which has a graph. The chart below is the Projected Inventory screen from the Plant Scheduler CAP (demo) model:
If you right click on the graph, you would find an option called “Copy”. Once you click this option, you would be able to copy the entire graph as an image.
This is how the copied image would look like for the above chart:
Keywords: Chart
Copy
Graph
Image
References: None
|
Problem Statement: There are multiple number of filters that one could use in SCM - column filters, advanced filters, value filters, text filters and global filters. When you create your own XML screen (without making use of the Data Viewers or Set Viewers), this
|
Solution: explains how you could add a column filter to the tables. This also explains how to add column sorting.
ThisSolution is written for SCM Modelers with basic knowledge of XML.
Solution
Let's consider a screen with nothing but just a table:
The following would be the XML code for this screen to display the table called _SAMPLE:
<?xml version=1.0 encoding=utf-8?>
<CONFIG>
<RESTS
Header=Screen using Reset
ViewModelID=:RESTS_VM>
<Views>
<TABLE
Type=PropertyView
DataSource=TABLESOURCE/>
</Views>
</RESTS>
<RESTS_VM>
<States>
<STATE1>
<Properties>
<TABLESOURCE
Type=Table
ValueSource=_SAMPLE/>
</Properties>
</STATE1>
</States>
</RESTS_VM>
</CONFIG>
RESTS is the View section of the code and RESTS_VM is the View Model section of the code. The View Model section is where the table to be displayed is mentioned. In this nest, if you add the following keywords:
AllowFilter=True
AllowSort=True
Then the screen would now show the column filter icons on the headers indicating readiness to use column filters. It will also allow sorting - if sorted, there will be a blue colored arrow on the column sorted. XML also allows multi-attribute sorting:
For numerical screens, it will allow number filters and numerical sorting.
For character filters, it will allow text filters and character sorting.
Keywords: Sort
Column Filter
XML
References: None
|
Problem Statement: The following
|
Solution: answers the question if there is a way to minimize the ribbon through a keyboard shortcut. There is a way to minimize the ribbon by clicking on the arrow icon on the right hand top corner.
Solution
The answer to this question is yes. The shortcut to use is Ctrl + F1.
Keywords: Ribbon
Keyboard Shortcut
References: None
|
Problem Statement: Cape-Open Unit 1.1 Operations is not listed under Available Unit Operations. How to fix it?
I get a message: The component 'ExcelUnit.UnitOperation.1' implements version '1.1'?. Please consult support for an upgrade of the CAPE-OPEN kit.
I have CAPE-OPEN 1.1 listed under thermo but I can not open an Cape-Open unit operation. How to fix it?
|
Solution: Both Cape-Open Unit 1.0 and 1.1 Operations are supposed to get installed automatically. If you have 1.1 missing in the available unit operations list (even if Cape-Open thermo is available) please make sure you have the corresponding dll and edf files and then register the dll file.
Please go to C:\Program Files\Common Files\Hyprotech\Cape-Open. Are activextender11.dll and activextender11.edf files there in this folder? If any of these two files are missing, please download it from the attachment and put it in the same folder. If you download the dll file from this document, please unzip and put it in the above mentioned folder.
You need to register the extension (the dll file) once you have both of the files. TheSolution document 120871 describes how to register an extension.
Keywords: Cape-Open, 1.1, unit operation, ActiveXtender11.dll, ActiveXtender.edf, kit, upgrade
References: None
|
Problem Statement: Basic XML knowledge in Aspen SCM is a prerequisite for reading this document.
|
Solution: s # 135832, 135995, 136528, 136585, 137107 and 138030 are recommended, if you are looking to gain basic XML knowledge in Aspen SCM.
When colors are used to differentiate data in a table, it is often to provide the color controls to the user. ThisSolution explains how to add a color picker utility to a XML screen, so that the user picks his own color.
Solution
Type=”Color” is used to create this control. The Value Source for storing the color should be a cell reference of a character table.
Here is an example screen:
Screenshot of the menu which appears when clicking on the “Advanced” button in the Color picker widget:
The following is the XML used to create this screen:
View Section:
<RESTS
Header=Screen using Reset
ViewModelID=:RESTS_VM>
<Views>
<TABLE
Type=PropertyView
Width=100
Height=50
DataSource=COLORSOURCE/>
</Views>
<Ribbon
ApplyDataChangesCommand=APPLYSCREENDATACHANGES
CancelDataChangesCommand=CANCELSCREENDATACHANGES/>
</RESTS>
View Model Section:
<RESTS_VM>
<States>
<STATE1 Setup=MSGBOX DSETUP>
<Properties>
<COLORSOURCE
Type=Color
ValueSource=_SAMPLE(1,1)/>
<APPLYSCREENDATACHANGES
Type=Command
DisableWhenNoChanges=True>
<After
A1=!Save/>
</APPLYSCREENDATACHANGES>
<CANCELSCREENDATACHANGES
Type=Command
DisableWhenNoChanges=True>
<After
A1=!Reset/>
</CANCELSCREENDATACHANGES>
</Properties>
</STATE1>
</States>
</RESTS_VM>
The ValueSource reference contains the color:
To preset a color while opening the screen, alphabetical format can be used: https://msdn.microsoft.com/en-us/library/ie/aa358802(v=vs.85).aspx at the ValueSource which can be populated during the BeforeSubstitute or Setup routine.
Keywords: Color picker
XML
SCM
References: None
|
Problem Statement: How do you calculate chemical activities with Aspen Properties?
|
Solution: Attached is an example which shows how to calculate chemical activities with Aspen Properties using Excel functions available in the Aspen Properties add-in for Excel. Note: These files were produced using Aspen Properties 2006 and Excel XP. This application will not run in earlier versions of Aspen Properties.
An application of this was recently described by scientists at Merck Research Laboratories in an article entitled:
Water Activity-Mediated Control of Crystalline Phase of an Active Pharmaceutical Ingredient, Organic Process R&D, 2007, 11, 229 - 236.
http://pubs.acs.org/cgi-bin/abstract.cgi/oprdfk/2007/11/i02/abs/op600277t.html
Within this article, the Merck scientists describe how they used water activities to define phase boundaries between anhydrous and hydrated forms of their compound. Then they were able to extrapolate the phase boundaries to other water-co solvent systems. This allowed them to design suitable solvent systems to ensure crystallization of the appropriate form, once the thermodynamic phase diagram was known in one solvent-water system.
In order to use this example, you will first need to install the Aspen Properties add-in. To do this:
1. Close all instances of Excel, then open a new Excel workbook.
2. Go to Tools/Add-Ins and click Browse.
3. Browse to the AspenTech directory on your computer.
4. Browse into C:\Program Files\AspenTech\Aspen Properties 2006\Engine, and select the file AspenProperties.xla. Click OK (you may need to click OK several times). Close Excel.
5. Reopen Excel. You should now see an Aspen Properties menu item in Excel.
After installing the Excel add-in, you should save the attached Excel workbook and the .aprbkp file to a folder on your hard drive. Then open the Excel workbook. The first time you do this, you will get a message that the specified property package does not exist. Click OK and the workbook will search for and find the appropriate .aprbkp file (assuming they are in the same folder on your hard drive).
Components Sheet
The first sheet, ?COMPONENTS? shows a list of all 130 solvents available for evaluation in the attached Aspen Properties model (also called a ?property package?). Each solvent is described by a model identification name, the name of the component in the Aspen Properties databanks, molecular formula, molecular weight and the CAS number.
This sheet also summarizes some of the rules for using and modifying the workbook. Here are a couple other comments on this workbook:
1. The Aspen Properties Name for each component is used in the drop-down menus. Aspen Properties has a restriction on the number of characters in a component's name. As a result, ACETONITRILE is abbreviated as ACETONIT, etc.
2. The only cells in this workbook that the user should modify are highlighted in tan.
3. If the calculated activity coefficients on the Binary Systems tab are all equal to 1, this means that Aspen Properties does not have any binary parameters for the system. In this situation, the calculated activities will be incorrect! Therefore it is critical to check whether or not there are non-unity activity coefficients for your binary pairs. If you wanted to, you could add some programming to this workbook to check whether all the activity coefficients on the Binary Systems tab were equal to 1, and if so, the application could give a warning message to let users know that the results are not valid. This concept also applies to ternary systems ? you must check EACH PAIR of solvents on the Binary Systems tab to make sure that Aspen Properties has parameters for them all. If Aspen Properties lacks binary parameters for a pair of solvents that are present in a ternary mixture, the ternary analysis will be incorrect!
4. This spreadsheet assumes that there is a single liquid phase. If there are multiple liquid phases present (or no liquid phase due to excessive temperature), the results will not be correct. You may wish to add additional capabilities to this spreadsheet to automatically check whether two liquid phases form for a given composition and temperature.
Binary System Sheet
To analyze a binary solvent system, click on the ?Binary Systems? sheet, and choose your two solvents in cells B4 and C4. Note the drop-down arrows to allow to select any of the 130 components.
Then specify the total system mass in cell C7 and the temperature in cell I3. Each time you modify one of these cells, the spreadsheet will calculate the activities of each component over the whole possible range of compositions. There is also a graph of the activity of each component vs. the amount of that component within the total system (scroll to the right on the Binary tab to view the graph). From this graph, you can quickly get a feel for what happens to the activity of a component as its portion of the total system changes.
Ternery System Sheet
To analyze ternary systems, go to the Ternary System tab. Then specify the amounts of each solvent (in grams), and the moles, volumes, activity coefficients, and activities will all be calculated. Next you can choose a different amount for each solvent to determine the activity based on a different composition.
Keywords: None
References: None
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Problem Statement: When a quoted cost item is entered, Aspen Icarus Process Evaluator (IPE) escalates the Adjusted Total Project Cost (cell C190 on projsum.ics) from the date of the cost engine (1Q98 for versions 5.0 and 5.1) as it does for all generated costs. This presents a problem since most quoted costs are entered in present day dollars.
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Solution: In IPE, escalation is calculated simply, using a formula similar to the following: X = A(1 + RN)
where X = total cost, including escalation
A = 1Q98 base cost
R = rate of escalation per period (as shown in field C132 of ProjSum.ics) N = number of periods from 1Q98 to the Start Date of Basic Engineering
So to get around this, when entering current costs for quoted cost items, use the following formula to estimate a 1Q98 cost for your item, knowing N, R, and X, which would be your present day cost.
A = X / (1 + N*R)
Keywords: escalation
quote
References: None
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Problem Statement: How is the controlling product defined in Aspen Fleet Optimizer?
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Solution: Within a given shipment, there can be more than one product to be delivered. A controlling product is a product that will run out first in a given shipment. In the detail window, the row that shows the controlling product of the shipment will be highlighted in red. This feature works only with a forecasted customer. With this feature, the user can pay close attention to the controlling product and manage deliveries more efficiently.
Keywords: None
References: None
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Problem Statement: Can I merge two component lists into one?
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Solution: If you are trying to take oil hypotheticals or a group of hypotheticals from one list to another, there is a shortcut. Select the component list (where you want to add) || View || Hypothetical || select a Hypothetical Group (for oil it's a blend) || then click on Add Group.
There is no shortcut option to combine or merge pure components and/or individual hypothetical components of two component lists. You have to add the components all over again.
Keywords: combine, merge, component list, oil hypo, component
References: None
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Problem Statement: In the Twu options for PR and SRK. What does the option Water Gas Kij do?
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Solution: Water in gas calculations refer to the special temperature dependant Kijs fitted for water - Argon, C1, C2, C3, H2, N2, and CO for the liquid and vapor phase Kijs.
Keywords: Water Gas, Twu, PR, SRK, Kij
References: None
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Problem Statement: What are the Internet Information Services (IIS) requirements or Aspen Properties Web Interface?
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Solution: The Aspen Properties Web Interface was developed and tested in IIS version 5 only. Therefore, this is the only version of IIS that is currently supported.
Note: As documented in the What's New for V7.3.2 release notes, Aspen Properties Web Interface will be discontinued in the next version. User are recommend to migrate to Aspen Properties mobile.
Keywords: Aspen Properties Mobile, Aspen Web Properties, IIS 5
References: None
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Problem Statement: After migrating to a newer version of Aspen Properties, the Excel interface stops working or it complains about a version incompatibility.
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Solution: This problem has been reported for users migrating from Version 11.1 to 12.1, and also by users migrating from 12.1 to version 2004. The source of the problem is that Excel does not forget the ealier version's Aspen Properties Add-in file. Please follow the below steps to force Excel to use the newer version of the Aspen Properties Add-in, AspenProperties.XLA.
Open a blank Excel spreadsheet. If an Aspen Properites dialog pops up, click on the OK button. Then click on the Tools pull-down menu and click on Add-ins. Uncheck the reference to Aspen Properties. Save the spreadsheet and exit from Excel.
Restart Excel and open a blank spreadsheet again. There should be no dialog box this time. Go to Tools pull-down menu and click on Add-ins. Click the BROWSE button and browse to ..\Program Files\AspenTech\Aspen Properties xx.x\xeq, find and select the AspenProperties.XLA file (where xx.x is the version number of your newest Aspen Properties version). Save the spreadsheet and exit from Excel.
Restart Excel. Open a blank spreadsheet. This time, the reference should be fully functional.
The best test after the third step is to create a brand new Aspen Properties model in the latest version of Aspen Properties, and then try to open it as the selected properties package from inside Excel.
In some cases, you may still get a pop-up message that tells you the older version of the xla file could not be found and that Aspen Properties will be using the file from the new location. This is OK. If you want to suppress this message please do the following:
In the Excel spreadsheet, click on the Aspen Properties pull-down menu and the click on User Options.
Click the check box lablelled: Suppress messages related to file import.
The purpose of this new message box is to inform the user that Aspen Properties is switching the old reference in the xls file to the new location. This means that saving the file will save the new location. Subsequent opening of the same file (after saving) will not invoke this message box again.
Keywords: excel
XLS
References: None
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Problem Statement: How do you set global defaults for Aspen Properties Mobile?
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Solution: After installing the Aspen Properties Mobile application on your mobile device you can configure the default options through the Apple Settings application. Go into Settings, scroll down to the Aspen icon labeled Properties, and tap the icon or label to open the configuration screen.
Go to the Server Connection screen to enter the IP address, user ID, and password for your Property Server account provided by your Aspen Properties administrator.
You can also configure the default units of measure within the settings. Go to the Global Units screen to select the base units set (SI, Metric, or English). You can also over-ride the default units for any of the physical types. These global settings will be applied to any new property case you open.
Use the iPhone Settings Application as shown below
Keywords: None
References: None
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Problem Statement: Is it possible to generate an Aspen Properties .aprbkp file from an Aspen .bkp file?
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Solution: There are two ways to open an Aspen Properties *.aprbkp file in Aspen Plus:
Rename the file to have an .aprbkp extension and simply open it in Aspen Properties.
Import the .bkp file into Aspen Properties and Save as a .aprbkp.
The flowsheet will be ignored.
To open an Aspen Properties .aprbkp file into Aspen Plus, there are again two options:
Rename the file to have an .bkp extension and open it in Aspen Plus.
Import the .bkp file into Aspen Properties and Save as a .aprbkp.
The simulation will have a Run type of Properties Plus on the Setup\Specifications\Global sheet. Change it to Flowsheet to add unit operation blocks.
Keywords: .bkp
.aprbkp
References: None
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Problem Statement: Can Aspen HYSYS calculate electrical conductivity?
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Solution: Aspen HYSYS will calculate the electrical conductivity of an ionic system if the OLI Electrolytes property package has been selected in the simulation basis. The OLI Electrolytes property package requires a separate license from OLI Systems (email: [email protected]; web: http://support.olisystems.com).
Keywords: electrical, conductivity, OLI, property, model
References: None
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Problem Statement: I have selected to use the Ideal Property method in Aspen HYSYS and have noticed that the heat capacity calculated in my simulation is different to what I have seen in literature. Is it possible for me to view what the equation looks like that is used in the calculation of this temperature dependant property. Secondly am I able to regress or alter the parameters used in the calculation of this property to fit the vales I have measured in my process.
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Solution: You will need to export an aprbkp file from Aspen HYSYS to Aspen Properties. The aprbkp file can then be loaded into Aspen Properties and 'Retrieve Parameters Results' function from the Tools Menu can be used to display the parameters under the Properties>Parameters>Pure Components folder. The user can now view and edit the parameter for the polynomial equation and conduct a regression case to fit the parameters to observed plant data.
Keywords: Aspen Properties, Retrieve Parameters, Parameters
References: None
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Problem Statement: How to enable Property Package in the Aspen HYSYS to CAPE-OPEN Property Packages?
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Solution: The CAPE-OPEN Property Packages are interfaced through COM thermo option in the basis environment. Detailed procedures for setting up a CAPE-OPEN property package in Aspen HYSYS simulation basis are described in the attached document.
Keywords: CAPE-OPEN, CAPE.
References: None
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Problem Statement: I have components that are not there in the component list of Aspen HYSYS. What should I do?
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Solution: Use hypothetical component(s) or pick up similar one(s) from the list.
HYPOTHETICAL COMPONENT:Solution number 109781 contains the detail procedure of creating a hypothetical component.
If you use a hypothetical component, you can also provide the structure of the component using UNIFAC component builder. It can either be accessed by clicking the UNIFAC button in the Hypo Group property view, or by clicking the Structure Builder button on the ID tab of the Hypothetical component property view. For more information on this procedure please open the HYPOTHETICALS section of your Aspen HYSYS Simulation Basis manual which can be found on aspenONE DVD 6. For version 2004.2, you can also download it fromSolution # 117413.
To simulate your component(s) accurately, you need experimental data or literature data for properties to define the components. You can replace the program estimated properties of the hypothetical component(s) component with your experimental or literature data. Please follow the instructions ofSolution # 109677 to change the properties.
SIMILAR COMPONENT:
If you believe that one of the available components in Aspen HYSYS closely matches your component, you can go ahead and use that library component to represent your actual component.
Again, to accurately represent the component you are modeling, please use any properties available to you to replace the existing those of the Aspen HYSYS library component. Please refer toSolution #109677 for detailed instructions.
Keywords: Missing component, not in component list, unknown component, new component, component.
References: None
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Problem Statement: How do I change component properties using the Aspen Properties Database Manager
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Solution: Since you cannot modify the default databases you need to create a new one that you can modify. Open the Aspen Properties Database Manager. Right click on Aspen Physical Properties Database V7.2 and select create new database:
Clone of the existing databases and click next:
Use login name apeduser and password Aprop100, select a new name for the database:
Go to the new database created right click on selected compounds and choose create new compound:
Give a name and alias to the new compound and click add:
Go to Properties and Parameters, select the newly created compound and go to the edit page:
Select the property you would like to change from the drop-down menu on the top right and enter its value (MW=18 in this case):
Click Add and then Submit Changes, you will see the following window:
When you Aspen Plus, you should be able to find the recently created compound with the specified properties:
Note that the clone database, update database, and download database features are no longer supported in V9 and later. These functions can all be accomplished using the backup database and restore database features.
Keywords: modify, properties, reference
References: None
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Problem Statement: How do you install Aspen Properties Mobile?
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Solution: Aspen Properties Mobile is a client-server application with a very light client installed on the end-users mobile device. The current version supports Apple iPhones (original, 3G and 4G), iPod Touch, and iPad.
The calculations are performed on a server. The server is hosted by the customer. Out of the box Aspen Properties Mobile includes the Aspen Pure Component database (which includes the newest data from DIPPR) and the NIST TRC database (US National Institute of Standards & Technology Thermodynamic Research Center), with over 20000 sets of pure component data). Customers can include their own custom data using APED (Aspen Properties Enterprise Database).
Your IT administrator needs to set up a dedicated server with Aspen Properties V7.1 or higher. Aspen Properties Mobile Server and Microsoft Internet Information Server (IIS) must also be installed. See the Aspen Properties Mobile Installation and Configuration manual for details.
The client is available as a free application on Apple's App Store - enter ?AspenTech? in the App Store search window to quickly locate AspenTech's mobile offerings.
Tap `Connect? on the Getting Started screens to configure your domain and user credentials.
Keywords: None
References: None
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Problem Statement: Is it possible to predict wax formation for a known stream?
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Solution: The ProFES deposition correlation method (available via the Deposition | Methods pagetab on the Pipe Segment form) can be used to predict wax formation based on the feed conditions entering the pipe.
Third party methods can be also be added as plug-in extensions.
Keywords: wax, deposition, pipe, segment, ProFES
References: None
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Problem Statement: Why are the hypo components not removed after deleting the blend from the Oil Manager?
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Solution: If you create a blend from the Oil Manager and then delete the blend you will notice that the hypo components created by the blend will remain in the simulation. To successfully delete a blend:
1. Enter Oil Environment via the Simulation Basis Manager.
2. Select Cut/Blend tab inside the Oil Characterization page.
3. Open the required blend from the list under Available Blends.
4. Select the blend from the Oil Flow Information table on the Data tab and then select Remove.
5. Now close the Blend form.
6. Delete the undesired blend from the list of created blends via the Cut/Blend page.
Keywords: Oil Manager, Blends, Hypo components
References: None
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Problem Statement: Is there a way to display a value from a stream utility on the PFD? For example, can the cetane index for a given stream be displayed on the PFD?
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Solution: Because the cetane index is calculated by the cold property utility, there is no direct way to display this value on the PFD, since there is no PFD object associated with the utility itself. In order to circumvent this problem, it is necessary to first import the the value from the utility into a HYSYS spreadsheet. Once the value is available in the spreadsheet, there are two alternatives available, depending upon how you want the information displayed:
Option 1
Create a PFD table for the spreadsheet and display the imported cell value directly. This option is preferable if you wish to display utility values for more than one stream in a single table. Note, however, that the spreadsheet object must be visible on the PFD in order to view the corresponding values.
Option 2
After importing the utility value into the spreadsheet, create a user variable to display the utility value in the desired stream (note that the user variable will have no associated VB code as it is simply a place holder for the utility value). Next, export the utility value from the spreadsheet into the newly created user variable (you will need to enter a formula on the spreadsheet equal to the imported value to facilitate this). Once the export is complete, a stream table can be added to the PFD that includes the utility value, along with any desired stream properties.
The attached simulation demonstrates how both options described above could be implemented.
Keywords: PFD, table, spreadsheet, utility, cold, property, envelope, critical, hydrate, CO2, freeze, boiling, curve, BP
References: None
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Problem Statement: Can I input single ion concentrations using the OLI Electrolyte interface (i.e. enter Na+ and Cl- instead of NaCl)? Additionally, if the ionic species present in an aqueous
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Solution: are known, can the OLI Electrolyte model calculate the concentration for each ion if the pH is known?
Solution
Unfortunately, the OLI interface within Aspen HYSYS uses molecular input for all species and not the corresponding ions. It is therefore necessary to enter a neutral molecular compound (such as NaCl) instead of the individual ionic species (such as Na+ and Cl-).
Note that the OLI Stream Analyzer (developed by OLI Systems) includes functionality wherein one can enter an ionic representation of aSolution. This is known as the Lab Analysis feature, and can be used to reconcile an ionic input for electroneutrality and pH. A molecular stream representation can then be created and manually entered into Aspen HYSYS. As well, if the pH of aSolution is known, the OLI Stream Analyzer can adjust system parameters to match the desired pH; however this functionality is not available in Aspen HYSYS OLI interface as this can be done only via the OLI Stream Analyzer program.
For further questions/inquiries about OLI software, please contact OLI Systems by sending an e-mail to [email protected].
Keywords: ion, concentration, OLI, compound, pH, interface
References: None
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Problem Statement: How can I Input the Vessel Nozzle Elevation Information in a Separator?
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Solution: Vessel nozzle elevation information can be entered via the Rating | Nozzles pagetab on the separator view. In order to make this page viewable, however, the Fidelity license option must be enabled. To do this, open the Integrator (select Simulation | Integrator from the top level menu or press Ctrl+I) to the Options tab and activate the Fidelity license option checkbox.
Once the Fidelity license has been enabled, the Rating | Nozzles page should become visible and the separator nozzle parameters can be entered.
Keywords: nozzle, page, separator, rating, info, elevation, fidelity
References: None
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Problem Statement: Are ACM models backwards compatible in Aspen HYSYS?
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Solution: New in Aspen HYSYS 2006, you can import Aspen Plus *.bkp file or Aspen Properties *.aprbkp files as an alternative to *.appdf and *.aprpdf files. Because *.bkp files are backward compatible and can be easily moved from one version of Aspen Properties to another, this feature makes it easier to reuse ACM exported models in HYSYS as you move between different versions.
Keywords: ACM, properties, property, definition, file
References: None
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Problem Statement: Is there any validation data for the symmetric model used in the hydrate formation utility?
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Solution: The attached spreadsheet includes:
1) the three main references used in evaluating the model parameters for the symmetric model
2) the corresponding experimental data for various hydrate systems
Keywords: symmetric, model, parameters, experimental, data, hydrate, formation, utility, comparison
References: None
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Problem Statement: What is the ambient temperature for a pipe surrounded by water or air?
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Solution: The ambient temperature entered in the Aspen HYSYS pipe segment is the bulk temperature of the fluid surrounding the pipe. For the purpose of the heat transfer calculations, the surrounding medium is assumed to be at constant temperature and have no thermal gradients.
Keywords: pipe, ambient, temperature, segment, heat, transfer, calculation
References: None
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Problem Statement: How do I create a database that can be used only within a 3rd party vendor of a client company with restricted access?
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Solution: This database security measure was implemented to enable the content of the database to be secured to protect the intellectual property of the company when the database is shared with an outside vendor, such as a technology partner or an engineering company.
The requirement is that the 3rd party must be able to use the database in the simulation calculations, but should not be able to view the content of the database in the Aspen Plus User Interface and Aspen Properties Database Manager. In addition, the database cannot be used outside of the 3rd party company.
Creation of the Restricted Database
The restricted database can be created from a secured user database (source) by creating a ?backup? of the ?source? with additional Access and Security settings. The source database must have been created with extra security.
To create a restricted database from a secured source database with added security to protect its content from view and modification, follow these steps:
1. From the Aspen Properties Database Manager, select Aspen Physical Properties Databases and start the database backup wizard, using RMB
2. The Backup Database Wizard appears. Enter Login Name and Password and select the ?source? database that you want to backup.
3. Check the ?Change Security Settings? checkbox. Note that if the selected database does not have the extra security then this checkbox will not be available. Enter the database creator password that you provided when creating the original secured database.
4. Note down the Backup file directory and name of backup file that will be created once you finish with this wizard. In this example, the file is: C:\Documents and Settings\All Users\Application Data\AspenTech\APED V7.0\PROCESSA.
5. Specify the database Access and Security settings on the form that appears.
6. Give access to Aspen Plus/Aspen Properties Calculation Engine. Do not give access to the Aspen Properties Database Manager and User Interface
Give access to the specified vendor company. Enter the Vendor validation string from the vendor (obtained by the vendor from the Aspen Properties Database Manager by using right-click on Aspen Physical Properties Databases | All Tasks | View Database Security String.
Copy this file and give it to your vendor. Tell him the name of the database and he will restore it
Keywords: Database, third party, vendor, restricted
References: None
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Problem Statement: What is the recommended fluid package option for a TEG-Water system, containing 80 wt% TEG and 20 wt% water?
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Solution: Glycol fluid package (available from 2004.1 and later versions only) is recommended for this application. Detailed discussions, comparison of results from Aspen HYSYS with literature, and references is attached with thisSolution..
Keywords: TEG, TEG-Water, regenerator, Glycol, Fluid, Package, Fluid Package
References: None
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Problem Statement: Upon launching Aspen HYSYS, I get an error message Please install XML parser 4.0. How can this problem be resolved?
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Solution: The XML parser is required by Aspen HYSYS for some of its functionality and as such it should automatically install with Aspen HYSYS on Windows XP. This error normally appears due to conflicts between the installation of the XML parser and Internet Explorer components used by HYSYS, and is normally solved installing the latest version of the XML parser. The link below will take you to MSXML4 SP3 which is current as of Oct 2011. If that link fails, then do a Google search for MSXML4. That will probably take you to the latest version
http://www.microsoft.com/download/en/details.aspx?id=15697
If you have already installed latest version of the XML parser but are still experiencing the same error message, then the problem might be that the XML parser isn't registered properly. To register the application, close Aspen HYSYS and all related applications then open the Windows START menu and select Run. In the ensuing prompt, type:
regsvr32 C:\WINDOWS\System32\msxml4.dll
then press OK (note that the path to the location of the msxml4.dll file may differ somewhat from machine to machine). A message indicating 'successfully registered' should appear if registration is successful.
If the problems still persist, un-install Aspen HYSYS and then re-install.
Keywords: MSXML, XML, parser, install MSXML4
References: None
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Problem Statement: In Aspen HYSYS, if you open column property view, and select Performance | Profiles. You will find that the volume flow reported here is Std Ideal Liq Vol Flow for every stage in the column. The
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Solution: will show you how to generate report with tray by tray actual volume flow and transport properties.Solution
In the attached MS Word document, you will find step by step instructions with HYSYS screen shots.
For users on super fast track,
1. Open column property view
2. Select Performance | Plots
3. Select Flow (or Transport Properties) under Tray by Tray Properties
4. Click on View Table button
5. Click on Properties button at the lower left corner of Profile Table dialog
6. Make your selections to view data
To include the data in your hard copy report or in MS Excel,
1. Select Tools | Reports
2. Create or Edit report
3. Insert or Edit Datasheet
4. Add datablock Case (Main) | column under investigation | Plots | Tray Tables
5. Print hard copy, or print to file and open in MS Excel
Keywords: Column Profile, actual volume flowrate, transport properties, density
References: None
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Problem Statement: How do I specify heat of reaction in a conversion reactor?
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Solution: The heat of reaction for conversion reactions in HYSYS is calculated based on the heats of formation for each of the components participating in the reaction. Since the duty calculated for the reactor is dictated by the enthalpy balance around the operation, the only way to match the heat of reaction (and hence the outlet temperature of the reactor) is to modify the heats of formation for the components fed to the reactor.
The easiest way to change the heat of formation for multiple components is to open the desired fluid package (in the basis environment) and press the Edit Properties button. On the left hand side of the ensuing window, select the Heat of Formation entry and modify the property values as desired. Note that this will change the component heats of formation only within the selected property package.
If you wish to change the heat of formation for each component globally (i.e. if certain components are used in multiple fluid packages in the same simulation), you will need to access the pure component view for each compound individually, and change the heats of formation via the Edit Properties button found at the bottom of each respective window.
Keywords: conversion, reaction, heat
References: None
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Problem Statement: Is it possible to copy or insert existing segments in the Aspen HYSYS pipe operation?
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Solution: Attached is a customized Excel workbook that will enable the user to insert or append copied segments into an existing pipe. The following parameters are transferred:
Length
Elevation Change
Outer Diameter
Inner Diameter
Increments
Roughness
Pipe Wall Conductivity
Keywords: pipe, segment, copy, insert, add, append, clone
References: None
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Problem Statement: How can I fix the compressor speed for multiple stages?
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Solution: You can use the spreadsheet operation to specify the speed of more than one compressor stages at the same time, as in the attached simulation. Note that the value of the desired speed (cell B2) must be calculated in the other cells (B4, B5 and B6) in order to export the value.
In this example, compressor curves are used to calculate both efficiency and exit pressure for each of the compressor stages.
The example was made with the Aspen HYSYS version 3.2.
Keywords: compressor, speed, spreadsheet
References: None
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Problem Statement: How do I display the CP/CV ratio for all stages in a column?
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Solution: Aspen HYSYS does not display the Cp/Cv ratio for stages.
Wordaround:
Create internal streams expressly for this purpose on Flowsheet| Internal Streams page, and then add the Cp/Cv ratio for each of these internal streams on Flowsheet| Variables page of the column property view.
I have attached a sample case to demonstrate this workaround.
Keywords: Trays
Specific heat
References: None
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Problem Statement: How to access the elevation variables of mixer and tee, Base Elevation Relative to Ground Level, Elevation (Base), and Elevation (Ground), in dynamic model through OLE automation?
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Solution: Backdoor approach is used to retrieve the variables.
In the attached MS Word document, Aspen HYSYS screen shot showing the variables and the VBA code snippet are presented.
Keywords: Backdoor variable, Base Elevation Relative to Ground Level, Elevation (Base), Elevation (Ground).
References: None
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Problem Statement: How do I create an Aspen Properties database so that it can be used only within a client company?
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Solution: If you want to add security measures to protect the database from unintended usage so that the database can be used only within the users own company, you can do that. If you try to restore the secured database at different company, it would not function. To create a database with this security, follow these steps.
1. From Aspen Properties Database Manager, select Aspen Physical Properties Databases, right-click and select Create a New Database
2. Follow the step to create the database, such as by importing legacy files. In the dialog box that appears, enter the Login Name, Password and Database Name.
3. Click Next to specify extra security
4. Check the ?Add extra Security to this database? checkbox.
5. Enter the database creator password. It is extremely important that you note down this password and keep it in a secured location. You will need to use this password if you want to create a restricted database for 3rd party or you need to backup the database using a different security string, in case the security string of your company (as returned by the License Manager) has been changed.
6. Finish the rest of the steps of the database creation process.
The database thus created can be used only within your company.
Keywords: security, password, database.
References: None
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Problem Statement: How can I add a material balance table to the PFD?
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Solution: Object inspect the stream or operation for which you want the Table. Choose the option Show Table from the Object Inspection menu. The Table will appear on the PFD, and will contain the default variables appropriate to the Object Type. Object Inspecting the Table opens a menu allowing you to change the Properties on the Table, or change the Colour, Font, or Hide the Table.
Keywords:
References: None
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Problem Statement: I want to add a pipe segment between two already existing pipe segments. Can I do that?
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Solution: Beginning with HYSYS version 2.3, this is possible. Unfortunately, this functionality is not available in HYSYS 2.2 or earlier. In HYSYS 2.3, on the Rating tab, Sizing page select the pipe segment that you wish the new segment to be inserted before then press the Insert pipe segment button. The Append pipe segment button can be used to add pipe segments to the end of the pipe. As you place your mouse over the buttons, there is a text message (fly by) that explains what each button will do (see the bottom left hand corner of the program).
Keywords: Pipe segment, insert
References: None
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Problem Statement: For a blend spec operation, why does the operation show duplicates for certain specification?
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Solution: From Results Window, select tab Operation, with column BLEND active, some blend operation has duplicate rows. Those are caused by the spec the user made in table BlendSpec. If you spec the quality in both MIN/MAX, you will have duplicate rows. If you only spec MIN or MAX, there will be only one row displayed.
The reason for that is for each spec (MIN/MAX), Aspen Petroleum Supply Chain Planner (PSCP) is going to build one equation (or a constraint) for that spec.
Keywords: BlendSpec
Blend
Spec
duplicate
operation
References: None
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Problem Statement: After selecting which variables you want to display on a chart, the results may show phase properties (i.e. liquid mass enthalpy) even though the specified phase does not exist (i.e. the mixture is above the critical point). Such properties may be misleading unless the overall thermodynamics of the system are considered.
|
Solution: To avoid incorrect interpretation of the results, it is advised that the user display the phase fraction on the plot, and monitor this value. For example, if the liquid fraction is zero, then all liquid properties may be ignored.
This behavior is consistent with other dynamic simulators (i.e. Aspen Dynamics) which employ a similar approach. The plotting capability has to be generic and cannot refer to specific phase fractions. As a consequence, this behavior will not be modified in future releases (i.e. such as not showing the curve when the phase does not exist) as it might lead to some confusion among users (i.e. curves suddenly disappearing).
Keywords:
References: None
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Problem Statement: Is there a shortcut key that allows you to break a connection on the PFD in Aspen HYSYS?
|
Solution: New in Aspen HYSYS 2006.5, holding down the B key allows you to break a connection between two objects (in the same manner as holding down the Ctrl key activates the PFD Attach mode).
Keywords: shortcut, short, cut, hotkey, hot, key, break, connection, disconnect
References: None
|
Problem Statement: Dais Trader Configuration and Tips
|
Solution: 121142 - PCWS Trouble Shooting Guide
for the latest, comprehensive information for Production Control Web Server Issues.
Applicable Version(s)
Production Control WebServer - all versions
Aspen DMCplus and Aspen IQ - all versions on supported platforms
Keywords: Production Control Web Server
Web Viewer
PCWS
DMCplus
Aspen IQ
Dais
Dais Trader
References: None
|
Problem Statement: Is there a way to make column specifications as independent variables (ind) in a case study?
Or
Why can I not check the white box 'Ind' when column specification is inserted as independent variable in case study?
|
Solution: In order to manipulate the variables in the case study, they must be user-specified values. It is possible to insert the non-specified variables in the case study, but then the variables can only be specified as 'dependent' but not as 'independent'.
In a column if after inserting column specification in a case study, it is either grayed out or you cannot check the white box for independent, then the possible cause is, imported variable is incorrect.
Note: There are two values associated with the column specification; the calculated value and user-specified value. You will need to import the user specified value of the specification, for it to appear as independent
For demonstration, if 'Reflux Ratio' is the specification in column, then you should insert variable as 'spec value' ( not 'Reflux Ratio') and then variable specifics as 'Reflux Ratio' (as shown in screen shot) in order to behave it as independent variable in Case Study.
Keywords: Case Study, column specification, independent, ind, white box, grayed-out
References: None
|
Problem Statement: What property constants are available from the PureComponentConstant function in the Aspen Properties Add-in for Excel?
|
Solution: Some pure component parameters are available using the Aspen Properties Add-In using
=PureComponentFunction(ComponentList, PropertyName)
There are eight possible PropertyNames:
· AcentricFactor
· CriticalCompressibilityFactor
· CriticalPressure
· CriticalTemperature
· GyrationRadius
· MolecularWeight
· NormalBoilingPoint
· NormalFreezingPoint
Keywords: None
References: None
|
Problem Statement: When I use Mouse wheel for 'Zoom In' and 'Zoom Out', it doesn't work. Why?
|
Solution: Ensure that 'Enable Cross Hairs on PFD' checkbox has been activated in your session preferences (i.e. select Tools | Preferences from the main menu and view the Simulation | Options page).
Key words
PFD, zoom, zoom in, zoom out, mouse
Keywords: None
References: None
|
Problem Statement: When copying a flowsheet object from one simulation case to another, the fluid package selected in the object is compared to the existing fluid packages in the second simulation case. If a matching fluid package cannot be found, the original fluid package will be copied into the second simulation case with the object. What are the attributes examined when searching for a matching fluid package?
|
Solution: In Aspen HYSYS, any two fluid packages are considered as matching or equivalent, if the fluid packages have identical set of components, identical sorting order for each of the components in the set, and identical selection of property package. If matching fluid packages are found in two separate simulation cases, the fluid packages will not be copied when copy/paste flowsheet objects from one to the other.
Note that the fluid packages do not have to have identical names, nor do the associated component lists.
Keywords: fluid, package, component, list, identical, matching, copy, import, export
References: None
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Problem Statement: When entering binary interaction parameters for an activity coefficient model, what do the subscripts represent (i.e. what do i and j represent in the Aij and Bij matrices)?
|
Solution: When entering binary interaction parameters (Aij or Bij) in an activity coefficient model, i represents Component i and j represents Component j in the binary pair. In matrix notation, i corresponds to the row where Component i can be found, and j corresponds to the column where Component j is located. Refer to the table below for illustration.
ComponentA (j)
ComponentB (j)
ComponentC (j)
ComponentD (j)
ComponentA (i) a
-
ComponentB (i)a
-
ComponentC (i)a
-
ComponentD (i)a
-
On any row, read left to right then up for Aij or Bij parameters, and for any column read down and then left for Aji or Bji parameters.
Keywords: binary, interaction, parameter, activity, coefficient, model, NRTL, Wilson, UNIQUAC, Chien Null, Margules, Van Laar
References: None
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