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Problem Statement: Is the calculated Mach number based on mass (design) flow or rated flow? | Solution: Aspen Flare System Analyzer calculates the Mach number of all pipes based on the specified mass (design) flow.
However, if the user decides to use the relief valve’s rated flow for tailpipes, the Mach number for the pipes specified as tailpipes will be calculated based on rated flow.
ThisSolution illustrates two cases for the same Aspen Flare System Analyzer model. The first one, Case 'A', shows the calculated value for Mach number of pipe segments specified as tailpipes and for which Mach number is calculated based on rated flow, whilst Case 'B' has no rated flow specified for tailpipes.
1) Case 'A':
All pipe segments downstream of sources (pressure safety valves / control valves) are specified as tailpipes on the Inputs | Pipes summary.
Next, on the Calculation Settings Editor, tailpipes are specified to use rated flow. Notice that other than the specified tailpipes, no other pipe segments will make use of rated flow, but of mass (design) flow.
The model is run and the 'Mach Number' label is added to show the calculated Mach number of all pipe segments. Note that for 'Tailpipe 1' the calculated inlet and outlet Mach numbers are 0.323 and 0.423, respectively.
1) Case 'B':
All pipe segments downstream of sources (pressure safety valves / control valves) are specified as tailpipes on the Inputs | Pipes summary, just as in Case 'A'. The difference here is that on the Calculation Settings Editor, the 'Rated flow for tailpipes' checkbox is cleared, so all pipe segments in the model are set to work with mass (design) flow, even if any pipe segment in the model is declared as a tailpipe in the Inputs | Pipes summary.
As in case 'A', the model is run and the 'Mach Number' label is added to show the calculated Mach number of all pipe segments. Note that for 'Tailpipe 1' the calculated inlet and outlet Mach numbers are now 0.311 and 0.396, respectively.
Keywords: Mach Number, Mass Flow, Design Flow, Rated Flow, Tailpipes
References: None |
Problem Statement: How to minimize breaking links between ASW workbook and (Aspen Plus, Aspen HYSYS or Aspen EDR) model variables?
Root Cause:
The links between ASW workbook and simulation model variables can be broken in many ways. The best practices followed by root cause explanation show in “ | Solution: ” section.
Solution
1) Do not edit a simulation while developing the ASW interface.
- Problems may occur if you change the paths or delete variables that are linked in ASW, and in turn, this may cause ASW links to stop working.
2) Never save a simulation with a new name while it is open in Aspen Simulation Workbook.
- This will result in broken links the next time you open the ASW file.
3) Do not save an ASW workbook if its associated simulation crashed during a run.
- This could cause all ASW links to become broken.
4) Be careful when putting formulas in ASW table cells.
- Never put formulas into cells used to report results.
- The formula takes precedence, so results will not get updated.
- Formulas in tables will slow performance.
- Excel runs many more calculations to ensure results are fully updated.
- When possible, put the formulas outside ASW tables.
- Try to put these kinds of calculation in Spreadsheet of HYSYS or Calculator of Aspen Plus instead.
5) Do not put too many (e.g., 200+) variable tables into one workbook.
- It is better to include a smaller number of tables with more variables per table.
Keywords: Aspen Simulation Workbook, Best Practice, Tip, Formula, Variable Table
References: None |
Problem Statement: If closed by accident, how do I re-display the Model Palette in Aspen Plus? | Solution: In Aspen Plus, there are two methods to turn the Model Palette on and off:
The hotkey (shortcut) method: Press the F10 key to toggle the Model Palette
The manual method:
In the Simulation Environment
Click the View tab in the Ribbon and then click the Model Palette button
You may hover the mouse pointer over the Model Palette button to see the Hotkey (F10) and a short description
Keywords: Aspen Plus, Hotkey, Shortcut, Model Palette, F10
References: None |
Problem Statement: APC controller with direct OPC connection can not write to certain DCS tags while CIMIO for OPC can. The observed error status is failure with E_BADTYPE | Solution: For certain OPC server, a Write from a client has to match data type of the DCS point before the written value is accepted. A mismatch data type will result in a write failure with an error status E_BADTYPE. Reading the same tag returns the valid value with no error status.
CIMIO for OPC is an OPC client but it is more flexible in accepting and writing to the DCS OPC server. A mismatch data type while using CIMIO for OPC doesn't result in a write failure.
In cases where direct OPC results in a write failure with an error status E_BADTYPE while write through CIMO fof OPC work perfect, try to change the configured data type of the tag to match the DCS data type.
Keywords: Direct OPC
E_BADTYPE
References: None |
Problem Statement: This knowledge base article shows you how to install the Microsoft .Net Framework 4.x download, which is located on the aspenONE Media. | Solution: .NET Framework can be obtained from the version of the aspenONE media that you are trying to install, located in the 3rd Party Redistributables folder:
NOTE: Your version of aspenONE may have different .NET Framework versions. Below is an example of aspenONE V11.
To install .NET Framework:
Make sure you open the folder for the version of .NET Framework you are trying to install.
Right-click on the executable and select Run as administrator.
3. Read and accept the license terms and then click Install.
Keywords: How do I install Microsoft .NET Framework
Microsoft Framework 4.0
Microsoft Framework 4.5.2
Microsoft Framework 4.6.2
Microsoft Framework 4.7
Microsoft Framework 4.8
Install Microsoft .NET Framework 4
References: None |
Problem Statement: Does the FCC unit calculate the carbon content in the produced coke? | Solution: You can find the hydrogen content in Advanced/ Results/Coke Distribution. You could safely assume that the rest is carbon content in coke.
Key Words
FCC
Coke
Carbon content
Keywords: None
References: None |
Problem Statement: After a new installation of the Aspen MES Web Server, the aspenONE Process Explorer home URL displays a blank page on all browsers.
This article the possible cause and re | Solution: to this behavior. Solution
Access the IIS homepage on the Web Server with the following URL:
http://localhost/iisstart.htm
If the above URL also returns a blank page, most likely the Static Content feature was not installed on the Web Server while installing IIS.
To enable Static Content on Windows Server 2008 or Windows Server 2012
Open Server Manager -> Add roles and Features -> Select Role-based or feature-based installation -> Select the Server and open the Server Roles -> Locate Web Server(IIS) -> Expand Web Server and then Common HTTP Features -> Check Static Content
Complete the installation and then restart IIS.
Keywords: A1PE
Blank
References: None |
Problem Statement: Are the parameters generated by SR-POLAR available? | Solution: For polar components (dipole moment >> 0), if you do not enter the SR-POLAR scalar parameter RKUPP0, the system estimates RKUPP0, RKUPP1 and RKUPP2 from vapor pressures using the Antoine vapor pressure model.
If you do not enter at least one of the SR-POLAR binary parameters RKUKA0, RKUKA2, RKULA0, RKULA2, or RKUKB2, the system estimates RKUKA0, RKUKA2, RKULA0 and RKULA2 from the Hayden O'Connell model (HOCETA) or UNIFAC models.
These SR-POLAR Equation of State (EOS) parameters can be reported after selecting Retrieve Parameters on the Tool section of the Home Ribbon. They can be found on the Properties | Methods | Parameters | Results | Pure Component / Binary Interaction | Scalar tabs:
They are also available on the in the History file (select History from the Summary section of the Home ribbon). For example, for Acetone-Water we get the following reported in the history file for SR-POLAR:
THE FOLLOWING PURE COMPONENT PARAMETERS ARE ESTIMATED FOR MODEL ESRKU:
COMPONENT WATER
POLAR PARAMETER RKUPP0 = 0.065549
RKUPP1 = -0.560763
RKUPP2 = -1.260662
COMPONENT ACETONE
POLAR PARAMETER RKUPP0 = 0.012355
RKUPP1 = 4.218143
RKUPP2 = -8.473403
THE FOLLOWING BINARY-INTERACTION PARAMETERS ARE ESTIMATED FOR MODEL ESRKU:
BINARY WATER - ACETONE
RKUKA0 = 0.513579E-01
RKUKA2 = -79.5340
RKULA0 = -0.191620
RKULA2 = 39.8206
FOR 298.15 (K) <= T <= 318.15 (K)
Keywords: SR-POLAR, Binary Interaction Parameters, Estimation, ESRKU, RKUPP, RKUKA, RKULA.
References: None |
Problem Statement: Does Acid Gas -Chemical Solvents property method support Amine Blends in Aspen HYSYS? | Solution: The Acid Gas - Chemical Solvents property package supports the following amines and amine blends in Aspen HYSYS V9.0.
In Aspen HYSYS V10.0, the following amine blends are supported.
Keywords: Acid Gas - Chemical Solvents, Amine Blends
References: None |
Problem Statement: When using RadFrac user can specify efficiency in Column| Specification| Efficiency folder and when using specific packing type HETP can be included. HETP can be also considered as efficiency factor. How Aspen Plus perform the calculations when both Efficiency and HETP are specified in column inputs? | Solution: For an equilibrium based column, the efficiencies are used for the concentration calculations. Then, the HETP is used in the sizing or rating of the column. Both types of specifications are considered in the output results.
To check difference in a specific column, one can create two columns with almost the same setup, where the only difference is that in one case Murphree/ Vaporization efficiency is used and in other it is not included. Results are different for example for pressure drop calculations as the flows which are considered per stage are different.
For rate-based columns, the efficiencies are only used to initialize the column. In the end, they are back-calculated from converged vapor and liquid composition profiles.
Keywords: Column Internals, Pack sizing and rating, HETP, Efficiency, RadFrac
References: None |
Problem Statement: This knowledge base article provides an example Aspen SQLplus script which calls the Aspen Framework Application Programming Interface (API) to retrieve a list of Aspen Security roles and role members. | Solution: Before you can run this example you must:
1. Include a reference in Aspen SQLplus using View |
Keywords: None
References: s to the libraries 'PFWSecurityAPI 1.0 Type Library' and 'AuthWrapperSvc 1.0 Type Library' as shown on the screen grab below:
2. In the example query below, change the line objSecApi.PfwSetUser('domain', 'administrator', 'xxx'); to a valid Domain, user and password with access to the security administrator
This is a sample Aspen SQLplus query:
local objSecApi, obj;
local strRoleDN, strRoleDesc, varGroups, varUsers;
local Index, Index2, FirstRole, LastRole Integer;
local str, RoleName, RoleID, RoleDesc, RoleNames, RoleIds;
-- Include a reference in SQLplus to the Library
-- 'PFWSecurityAPI 1.0 Type Library'
-- and 'AuthWrapperSvc 1.0 Type Library'
-- Get a list of roles
write ' ';
write 'List of all roles:';
write ' ';
obj = New(AUTHWRAPPERSVCLib.AfwAuthorization);
obj.GetAllRoles(RoleNames, RoleIds);
firstRole = LBound(RoleNames);
LastRole = UBound(RoleNames);
For Index = FirstRole To LastRole do
str = RoleNames[Index];
Write (str);
end;
write ' ';
-- Get member data for the first role
objSecApi = CreateObject('AspenTech.AFW.PFWSecAPI');
-- Set Domain and user context for the request
-- PfwSetUser(Domain, User, Password)
objSecApi.PfwSetUser('domain', 'administrator', 'xxx');
-- Get Data for all roles
For Index2 = FirstRole To LastRole do
RoleName = RoleNames[Index2]; -- Set the Rolename
strRoleDN = '';
strRoleDesc = '';
write ' |
Problem Statement: For rate based columns, the temperature reported under Performance Tab - Column Profiles Page is not consistent with the Worksheet Tab reported values for overhead vapor stream. Why? | Solution: The reason why there might be an inconsistency is that the temperature reported on Performance Tab - Column Profiles Page is the stage liquid phase temperature. The vapor phase temperature that is reported on the Worksheet tab is slightly different because the stage phase does not have to be in equilibrium for the rate-based column.
In future, both vapor and liquid temperature will be shown under the column profiles table in the performance report for rate-based column.
Keywords: Rate Based Column, ENRTL, Performance, Column Profiles
References: None |
Problem Statement: Does the Fired Heater in Hysys model the conversion of H2S to SO2? | Solution: The Fired Heater in Hysys is not designed to model the conversion of H2S to SO2. In V9.0 we have the Sulfur Recovery Unit Operations integrated into Hysys and this should be used to model the conversion process.
Key Words:
H2S Recovery, SRU, Fired Heater
Keywords: None
References: None |
Problem Statement: When I try to add one of the built in columns an error message like: This template case .... does not exist or is unreadable appears - Why am I seeing this and what should I check? | Solution: The error message indicates that Aspen HYSYS could not locate or read source files of the built-in columns (referred to as “Template Case”). This issue could be caused by missing source files or incorrect template file path specification.
It is more likely that template file path was incorrectly specified. To verify, use the screenshot as a guide and follow these steps (applicable from V8.4 to V10):
On Aspen HYSYS V10 window: Click File > Options > Simulation.
Under Default File Paths section, verify if the file path address next to Template Files points to the correct folder. (Typical installation has the folder under: C:\Program Files (x86)\AspenTech\Aspen HYSYS V10.0\Template)
Note: Typically these template files need not be moved, however if they have been, then the “Template Files” entry should be modified accordingly.
If template file path has been verified, it is possible that source files inside the template folder are corrupted. To fix this, you can run a repair installation (the installation files must still exist on your machine). General steps are as followed:
Open Control Panel > Look for Uninstall a Program. You can alternatively paste the following link to the address bar of File Explorer: Control Panel\Programs\Programs and Features
Locate your product name (in this case, Process Modeling (HYSYS) for Aspen HYSYS) > Right-click > Select Repair.
Keywords: template case, does not exist, unreadable
References: None |
Problem Statement: What are the options to export drawings from EDR Mechanical to external software? | Solution: Our Inventor interface creates a 3D model that can be exported to AutoCAD. This model is 100% scalable as the user would expect since it is 100% created in Autodesk 3D modelling tool (Inventor). The negatives are that the model is not complete (we do not have all flange types for example) but the major parts work.
Every time something is changed in EDR, the user needs to re-run the 3D model to capture the changes. No two-way immediate interaction between Inventor and EDR.
If the user does not have Inventor, our FORTRAN-based drawings can be exported to *.DXF and then to *.DWG (inside AutoCAD). Most of our drawings are NOT 1:1 scale so additional work needs to be done inside AutoCAD.
Keywords: Drawing, Inventor, EDR, mechanical, autocad
References: None |
Problem Statement: How can I simulate inorganic materials in Aspen HYSYS? | Solution: You can add inorganic material from Aspen Properties database. But for your information, Hysys can model solid handling to limited extent. HYSYS is basically a VLE (Vapor liquid equilibrium) simulator.
HYSYS doesn't account for solid-liquid-vapor equilibrium. Their vapor pressure information is by defaults set to zero. The existence of solid components is only reflected in the energy and material balance calculations. Hysys will perform energy and mass balance calculation mainly based on the information you provided in defining each component. You cannot model adsorption process in Hysys. For chemical reactions, especially with inorganic reactants, Aspen Plus is usually recommended.
Keywords: Aspen HYSYS, Inorganic, Materials
References: None |
Problem Statement: Why HYSYS reports the current value of reflux ratio even if the column does not have a condenser? | Solution: If the column does not have a condenser, the current value of reflux ratio in column specifications is reported for the 1st stage of the column. You can double click the reflux ratio in the specifications and check it.
The definition of reflux ratio is the molar flow of liquid leaving a stage, divided by the sum of the vapor flow from the stage plus any side liquid flow. It could be defined for condenser or any other stage in the column. You can find more details in the Help menu.
Keywords: None
References: None |
Problem Statement: What is the difference between the Gradients reported in Aspen HYSYS Pipe Segment? | Solution: The Gradients reported under the Performance | Profiles section of a Pipe segment represent Pressure drop due to different effects.
Each gradient reports the pressure loss per unit length [Pressure Drop/ Distance] for different reasons:
Friction Gradient: Pressure loss per unit length due to friction.
Static Gradient: Pressure loss per unit length due to gravity effects.
Accel Gradient: Pressure loss per unit length due to changes in density.
Please keep in mind that thes results are reported per each pipe increment, which can be controlled under the Rating tab of the Pipe segment.
Keywords: Gradient, Profile, Performance, Segment, Increment.
References: None |
Problem Statement: How can I switch among HYSYS cases? | Solution: Whenever users have two or more HYSYS cases open, it will be possible to switch among cases by going to File | Activate.
The image below illustrates the case in which three HYSYS cases are open. The active case is the one shown on the upper-central part of the HYSYS window (‘ClausProcess.hsc’ in this example) and the other two open cases (open but inactive cases) are listed on the ‘Activate’ column. By clicking on any of the inactive cases, the user will switch to the selected inactive case and put on hold the previous active case.
If only one HYSYS case is open, the ‘Activate’ feature will be grayed out.
The mentioned above will only be valid as long as users work in the same Aspen HYSYS instance.
Keywords: Activate, Switch, Active, Inactive, Cases.
References: None |
Problem Statement: For more details about concept of application snanpshot and histroy dataset has been describes in KB article ID 38557. Please refer through below link:
https://esupport.aspentech.com/S_Article?id=000038557
The purpose of this article is to describe steps to retrieve application snpashot & history, using DMC3 builder. | Solution: Assumptions – An online application is already deployed through DMC3 builder.
From the Online menu, access the “Configure Server” option to confirm the history retention configuration. This action will open the Configure Online Server program. You should the following dialog:
To get the snapshot for a deployed controller, follow the below steps:
1. Navigate to Online tab from bottom left pane. Automatically, the application page will open when applications are deployed.
2. Highlight the required application and select “Get Snapshot” from tools menu
Above is the example of a snapshot and notice its pre-defined naming convention based on date of the snapshot.
The name of snapshot can be changed based on user’s requirement.
After taking the snapshot, it is automatically available in DMC3 builder workspace. In case it is required to be exported, it can be done by Right click on snapshot name à Export.
Application history extraction:
In order to extract the history dataset for the same application, return to the Online Applications view, select the application and click on “Get History”:
Select Get History and further this history dataset can be used for comparison purpose.
Keywords: Application snapshot
Application history
Controller
Online history
References: None |
Problem Statement: Can polymer reaction kinetics can be modified in Aspen Plus Dynamics? | Solution: By default, most of the polymer kinetics models (except Free radical and Ziegler Natta) are closed form. So, the reaction parameters are not available for modification during dynamic run, estimation and optimization. In closed form, the rate of reaction is calculated by a procedure that uses same reaction subroutine used by Aspen Plus calculations. The reaction rate constants are saved to the “. appdf” file created during export process from Aspen Plus to Aspen Plus Dynamics.
Key Words
Polymer, Reaction, Closed form, Parameter
Keywords: None
References: None |
Problem Statement: How to use Table CASE with a global model | Solution: Table CASE in a MPIMS Model will allow user to run stacked cases, make local model case modifications and update any global model tables.
To access local model:
a. Use MODEL Keyword in Global Case Table as follows:
Enter the keyword MODEL in the column below the case identifier, but above the keyword TABLE.
Enter the model name or model identifier (this value is case sensitive) in the adjacent cell.
Note: Model names and model identifiers are case sensitive; therefore, MODELA, ModelA, and modela (because of the different use of upper and lower case characters) identify different models.
b. Modification of Local Model Through Local Model Case Table:
Note that even if local models are updated with a local case, there may still be overrides from the global model tables that modify local model elements
Keywords: None
References: None |
Problem Statement: Why is BLOWDOWN stopping calculations before reaching the Pressure Halt Condition? | Solution: BLOWDOWN solver checks if the next time step will go below the Pressure Halt Condition; if it does, then it will stop the solver, this is to avoid potential negative pressures or other instabilities at low pressures.
Usually pressure does not change much at the end of the blowdown, so solver will stop at the Pressure Halt Condition or very close to it.
If that is not the case and last iteration is still far from the specified Pressure Halt Condition, a lower pressure can be specified, or a smaller Time Step can be used to avoid violating the Halt Condition.
Keywords: Pressure, Halt conditions, blowdown
References: None |
Problem Statement: Why am I unable to get results for ISENEXMX in property analysis? | Solution: ISENEXMX is the isentropic exponent of the mixture. When you define this property set, please request ISENEXM for liquid or vapor phase under Qualifiers..
It does not make sense to report ISENEXMX for a total phase when there are two or three phases present, just like viscosity. After defining the phase, you will be able to report ISENEXM for that phase in the property analysis result.
Keywords: Aspen Properties
ISENEXMX
Valid phase
References: None |
Problem Statement: Infoplus.21 administrators add users to roles via the AFW manager. This can be quite tedious unless those users are already grouped under an active directory group. One way is to use SQLplus to extract the users and their role from a flat file or text file and add the users to their respective roles. Using this method, you can mass-populate AFW roles. | Solution: You do this by calling a COM object from within SQLplus query writer using the CreateObject function. Use this CreateObject function to call AspenTech.AFW.PFWSecAPI. This will expose the function you require - AddMembersToRole. This function allows you to add a user to a particular role.
An example SQLscript is shown below:
local SecMan;
SecMan = CreateObject('AspenTech.AFW.PFWSecAPI');
--PfwSetUser(Domain String, User String, Password String)
SecMan.PfwSetUser('SG-CSTEST01', 'adminbackup', 'adminbackup');
Write SecMan.AddRole('testing', 'Role Added From SQLplus');
--AddMembersToRole(RoleName String, Users Variant, Groups Variant, Validate Variant)
SecMan.AddMembersToRole('testing', 'adminbackup','','');
Keywords: role
member
Local security
Framework security
security
AddMembersToRole
COM
AFW
References: None |
Problem Statement: How can the Event/Gantt screens in APS model be grouped? | Solution: In APS, Grouping of the Event/Gantt screens can only be done at the Database level using the Database Tables, at the moment there is no way available to group the Event/Gantt screens using the APS User Interface or at Application Level.
In order to group the Flowsheet screens at the Database level, we must modify the GANTT_GROUP table.
So here is the step by step procedure to Group Event screens in APS.
1. Open APS Model
2. On the Left hand side, in the Navigation pane, we have the Model Tree view , Select the Events Tab
3. Right click on the Event Screens tab > Create New Screen > Define the screen names (ex: Process Units, Blending,Shipment taken in screenshot)
4. Once defined, save the model and close APS.
5. Now open the Database (SQL/MDB/ORACLE) > Open the Gantt_Group table.
6. In this table, you need to define a group first, give the group a name (ex: Group1 is taken here and the screens grouped in this are: Process Units, Blending, Shipment) and then add the Event Screen IDs to the Group.
The Event Screen ID can be found in the table Gantt_LIST.
7. Once done save the Database, the ORDER_BY column should be given a number, it is basically to sort the order for flowsheet screens that appear on the Tree.
8. Open APS and reopen the Model, in the navigation pane, Under the Event Screen Tab, you will now be able to see the Event Screen Group defined by you and the adjacent screens grouped.
This is the method to regroup the Event Screens for an APS/Orion model
Keywords: Group, Event screen, Gantt_GROUP, Gantt screen etc
References: None |
Problem Statement: How to make the Small Trends/Trend Thumbnails visible in APS Interface? | Solution: A Trend screen graphically depicts the following information:
- Minimum bounds
- Maximum bounds
- Points at which bounds have not been maintained.
This area of the screen contains the charting of tank or stream properties. Moving the cursor over a trend line displays a tool-tip that shows the time corresponding to the mouse position as well as the Y-values of all curves.
The Small Trend screens/Trend Thumbnails usually reside on the right-side of the Event interface.
In an event where they are not visible on the screen, there is a setting available in APS to get them back to be visible on the screen.
This setting can be found under the 'View' Button in the Menu Bar in APS. In order to enable the same, first navigate to the 'View Button' in APS menu bar as per the screenshot below:
If the option is not checked, check the option called as Trend Thumbnails,
Once enabled, you will have the small Trends enabled on the APS Interface, they can be moved to a convenient place on the screen or kept at the extreme right of the schedule/Gantt Screen,
Thus, you have the Small Trends visible on the APS Interface.
Keywords: Trend, Thumbnail, Small Trends,etc
References: None |
Problem Statement: When modeling two compressors in parallel, I seem to lose a degree of freedom, why is that? | Solution: If the compressor discharge streams of both compressors are directly connected to a mixer, you loose a degree of freedom. This is because the mixer might have Equalize All option enabled for stream pressures, so only one discharge pressure is needed to set the discharge pressure of the other train. If you add a valve to the discharge of each compressor, you will overcome this loss of a degree of freedom, and you can have each compressor running at a different point and have the flow split between them based on performance of each compressor (driven by the pressure/flow balance of the system).
Keywords: Compressor, Parallel
References: None |
Problem Statement: How do I open and view a TRANCOL file from a PIMS-AO execution using the AO Marginal Analysis Viewer? | Solution: V10 now allows generation of TRANCOL reports for PIMS-AO executions. These reports can be viewed with the new AO Marginal Analysis Viewer. First create the report using the “Create XLPTC File” option in MODEL SETTINGS | Reporting | Outputs tab.
This will create a file called tr000xxx.xlptc where xxx is the case number. After this file is created, go to Run | AO Sensitivity Analysis and then select the desired XLPTC file.
This will open the AO Marginal Analysis Viewer.
Keywords: None
References: None |
Problem Statement: When user is running an Aspen Plus simulation file, he may get an error as below.
LYNGBY MODIFIED UNIFAC MODEL: GMUFLBY HAS MISSING PARAMETERS:
UNIFAC GROUP STRUCTURAL INFORMATION PARAMETER, UFGRPL(DATA SET 1),
MISSING FOR COMPONENT PROPA-01; NO UFGRPL PARAMETERS SUPPLIED BY USER;
DEFAULTS NOT FOUND IN DATA BANK
****PROPERTY PARAMETER ERROR
ERRORS ENCOUNTERED IN CALCULATION OF VAPOR MIXTURE PROPS USING
OPTION SET RKSMHV2 FOR PHIMX
! Calculations stopped because of missing property parameters | Solution: The RKSMHV2 property method is based on the Redlich-Kwong-Soave MHV2 equation-of-state model, which is an extension of the Redlich-Kwong-Soave equation of state. The Lyngby modified UNIFAC model is used to calculate excess Gibbs energy for the MHV2 mixing rules.
The parameter UFGRPL stores the modified UNIFAC functional group number and the number of occurrences of each group. UFGRPL is stored in the Aspen Physical Property System pure component databank. For non-databank components, enter UFGRP on the Components | Molecular Structure | Functional Group sheet. If the functional group is not defined in UNIFAC, then user can refer to the following article to define a new functional group.
How does one enter a new UNIFAC group in Aspen Plus and what parameters are required?
https://esupport.aspentech.com/S_Article?id=000024884
PROPA-01 (CH2=C=CH2 ) is a databank component, but the function group of CH2=C=CH2 is not defined by UNIFAC, so user need to add it into the database. Then enter UFGRP on the Components | Molecular Structure | Functional Group sheet. After this, the warning message will be removed.
Keywords: PROPA-01, UNIFAC, UFGRPL, GMUFLBY, RKSMHV2
References: None |
Problem Statement: When you want to update the simulation model file location or link another file (including renamed file), how to accurately do it without breaking the links between ASW workbook and simulation model variables?
Root Cause:
Wrong procedures can break the links, for example: add the new file to the Organizer | Configuration | Simulation window and then directly delete the existing simulation file. Links to the variables will be broken and cannot be re-established. The figure 1 shows the warning message caused by wrong delete.
Figure 1. The warning message caused by wrong delete of original linked file. | Solution: The accurate way to update the simulation model file location or link another file (including renamed file) is using “Change case link” button showed in figure 2.
Figure 2. “Change case link” button for renaming or switching simulation model file.
When the “Change case link” is grey in Organizer | Configuration | Simulation window, try to disconnect (deactive) the simulation file and “remove embedded”, then “Change case link” button will be active for renaming or switching simulation model file (figure 3).
Figure 3. How to active “Change case link” button.
Keywords: Aspen Simulation Workbook, Change Case Link
References: None |
Problem Statement: Why does Viscosity shows <empty> when I use the OLI Electrolyte package? | Solution: Different from the normal workflow followed in Aspen HYSYS, when using the OLI Electrolyte package, some mayor results will not be displayed under the Properties summary of a stream:
The reason for this is that the stream properties will not be calculated by the normal HYSYS engine, but by the OLI engine itself. These results are shown under the Electrolytes form of the stream summary:
Keywords: OLI, Viscosity, pH, Heat capacity, Ion, Electrolyte, Property, Empty
References: None |
Problem Statement: How to find the vapor pressure value in Aspen HYSYS? | Solution: You can locate the true vapor pressure value in stream / properties. Click Append new correlation (the green cross in the bottom), in the correlation picker dialogue, under Standard, Apply True VP at 37.8 C.
Keywords: Vapor pressure, Aspen HYSYS
References: None |
Problem Statement: How is resident time defined in case of different liquid and vapor velocities in a RPLUG reactor? | Solution: The residence time is always the same, irrespective of the liquid hold up calculated (liquid is assumed to be the reactive phase).
The residence time definition is the next: Volume of the reactor / Volumetric flowrate.
This calculation does not consider the liquid hold-up.
“No-slip” condition is assumed when two phases exist.
Keywords: RPLUG, residence time, no-slip, slip, liquid hold-up.
References: None |
Problem Statement: Through the | Solution: articles (KB 000038262: Jump Start Guide to Activated Exchanger Design & Rating in Aspen Plus V8.4; KB 000038240: How to rigorously model a kettle reboiler in Aspen Plus), user knows the workflow of convert shortcut calculation to rigorous modeling of heat exchanger through activated Exchanger Design & Rating (EDR) dashboard.
However, sometimes user may face problem that the Accept Design button is grey after clicking Size button through EDR dashboard (figure 1). Is there any specific reason on this issue?
Figure 1. Accept Design button is grey after clicking Size button through EDR dashboard
Root Cause
EDR input information has some error and/or EDR doesn’t find a suitable design is the root cause of the Accept Design button turns grey, which means there is no design can be accepted.
Figure 2. Root cause of the Accept Design button turns grey
Solution
Please review the simulation model to make sure the input of EDR is reasonable (process data, default EDR configuration, etc.), then EDR may generate the reasonable design. If the Accept Design button is still grey, please navigated to ‘Errors & Warnings’ page, try to fix the Errors and size again. Accept Design button can be activated only when EDR runs normally and generates acceptable design.
Keywords: Heat Exchanger, Exchanger Design & Rating (EDR), EDR Exchanger Feasibility
References: None |
Problem Statement: Why does the Aspen HYSYS Depressuring utility calculate negative flowrate and show severe temperature fluctuations? | Solution: The possible reason is that the recycle efficiency selected was not realistic. Providing 1% as the recycle efficiency gives a more realistic answer than 100% in all instances for multicomponent systems. Reduction of the Recycle Efficiency prevents phases from instantaneously reaching equilibrium and allows for different temperature in different phases of the system.
The Recycle Efficiency is the amount of each phase that is involved in the flash calculation. The default value is 100%, this means that all the material will be flashed together and will be in thermodynamic equilibrium. By reducing the Recycle Efficiency a part of the material will bypass the equilibrium and the liquid/vapour will no longer reach instantaneous equilibrium. For Adiabatic depressuring studies a value of 1% for the gas phase has been found to yield better results for most cases. For fire scenarios leave the efficiencies to its default value (100%).
Efficiency = zero; system = isenthalpic (no loss of enthalpy);
Efficiency = 100%; system = isentropic (no loss of entropy);
Efficiency = 87-98% for vapor systems;
Efficiency = 40-70% for two phase systems.
Please take a look at previousSolutions that provides details about the Recycle Efficiency:
How can you prevent the negative flow in dynamic simulation?
Liquid volumes with multiple inlet streams to dynamic depressuring utility
Keywords: Depressuring, Recycle Efficiency, negative flowrate, temperature, multicomponent systems.
References: None |
Problem Statement: When running the model with AO, Error below appears.
Error E074. Group Tag INF in Table GROUPS Matches an Existing Stream or Utility Tag | Solution: The specific tag INF is used to build some infeasibility structures for AO. DR don't use this tag.
As a workaround, please replace the different tag name instead of INF.
The fix of this problem is included in V9.0 or later.
Keywords: PIMS AO
INF
E074
References: None |
Problem Statement: What is different about the horizontal and vertical orientations of the vessel in the Depressuring Utility and how does the model take the orientation into account? | Solution: The main differences are in the geometry of the vessel. If there is liquid in the vessel, the following things will be affected:
1. Wetted Area. This will have a major effect on heat input to the vessel when the API Fire method is used.
2. Area of vapor-liquid interface. This should not have that much of an effect.
Additionally, based on the orientation, the external natural heat transfer coefficient will change. This will have a small effect on theSolution.
Keywords: Depressuring Utility, Vessel Orientation, Vertical, Horizontal.
References: None |
Problem Statement: How do I setup Aspen Calc event driven calculations? | Solution: An Aspen InfoPlus.21 external task is used to drive calculations when a change is detected in an Aspen InfoPlus.21 database. Here are the steps to set up an event-driven calculation:
Start Aspen InfoPlus.21.
Run the batch file EventCalc.bat to load AspenCalc.rld. That file is located under the AspenTech\Aspen Calc\bin directory.
Set up an external task in the Aspen InfoPlus.21 Manager. The task is named TSK_CLC1 and the executable is located at C:\Program Files\AspenTech\InfoPlus.21\db21\code\tsk_clc1.exe (The Subsystem field may be left blank.)
Set up a trigger record by creating a record based on AspenCalcDef. See sample record AspenCalcTest1.
Description of the fields in an AspenCalcDef record:
Field Name Data Type
Description
NAME Character
The Record Name
CALCULATION NAME Character
The name of a Calculation or Schedule group
Note: If a Calculation is stored in a folder, the
Calculation name must be formatted as Folder\Calculation,
where the Folder is the name of the folder in which the
Calculation is stored.
NODE NAME Character
The node name on which the Calculation is to be run
(can be local or remote). If this field is left blank,
the calculation is assumed to be on the same node
as the record
#WAIT_FOR_COS_FIELDS Repeat Area
The number of changes of state conditions. The
Calculation is executed if any of the conditions become true
WAIT_FOR_COS_FIELD Field Pointer
An InfoPlus.21 database field on which changes
are detected
COS_RECOGNITION Integer
The type of changes that is recognized. The possible
values are:
'none', 'all', '>0', '<0', '=0', '<>0', '>=0' and '<=0'
SET_OPTION Integer
The value that the field is set to after a change has
been detected. The possible value are:
'none', 'set to 1', 'set to 0', 'set to 1', 'set to 2',
'set to 3' and 'set to 4'
Keywords: AspenCalc
calc
event
scheduling
References: None |
Problem Statement: When installing EIU or other excel Add-in the next error is prompted:
The following | Solution: cannot be loaded beacuse Microsoft support for the .Net framework 4.0 is not installedSolution
In some rare occasions the Visual Studio tools for Office are not installed within the .NET framework. You can download the tools in the next link:
Please see the links below for installing .NET 4
https://msdn.microsoft.com/en-us/library/bb608617.aspx
https://msdn.microsoft.com/en-us/library/ms178739.aspx
Keywords: EIU, .NET framework, VST, Add-in, error, installation
References: None |
Problem Statement: Is there any easy way to get mass density of pure component from Aspen Plus? | Solution: In Aspen Plus, Pure component property analysis feature can be used to generate tables and plots of pure component properties as a function of temperature and pressure.
The detailed mass density of pure component property analysis procedure is listed below and demonstrated in figure 1:
1) Click the ‘Pure’ analysis button in Home Ribbon to active new pure component property analysis form.
2) In the Property method field, you can select any property method that appears on the Methods Specifications form.
3) Select the property to be tabulated. In this case, ‘MASSRHO’ property-set is selected, which means mass density for pure component.
4) Select the components to be analyzed.
5) Check the phase want to see.
6) Specify the temperature range over which to calculate the property.
7) Specify the pressure (defaults to 1 atm).
8) Click ‘Run Analysis’ button to trigger the calculation.
9) When ‘Results Available’ showed at bottom left area, the mass density results table will be showed in ‘Results’ sheet.
Figure 1. Mass density of pure component property analysis procedure
Note: Pure component property analysis uses the property method you specify to calculate properties for the components you specify in the phases you specify at the conditions you specify, even if those conditions are unrealistic, for example, ‘liquid water mass density’ at temperatures far above the water boiling point (1 atm). User should have right phase information of investigated pure component to avoid wrong phase check. Phase diagram is very useful on right phase judgement, which may be found on literatures or please refer to knowledge base article 000037670 on how to produce phase diagram of pure component.
Keywords: Aspen Plus, Mass Density, Pure Component, Property Analysis
References: None |
Problem Statement: Is there any way to turn on and off PIMS-AO with visual basic command? | Solution: There is no direct call to turn AO on and off, however, we could use the below command.
To turn it on, the user need to set two integer settings (after opening the model):
go_PimsWin.SetIntegerSetting(UseXslpOn, 1);
go_PimsWin.SetIntegerSetting(UseXnlpMGOn, 1);
Then close and reopen the model to make sure the model is loaded properly:
go_PimsWin.CloseModel();
go_PimsWin.OpenModel(Model);
To turn off AO, make the following calls:
go_PimsWin.SetIntegerSetting(UseXslpOn, 0);
go_PimsWin.SetIntegerSetting(UseXnlpMGOn, 0);
go_PimsWin.CloseModel();
go_PimsWin.OpenModel(Model);
Keywords: Visual basic command, PIMS-AO
References: None |
Problem Statement: How to use 'Publish Plan' in PIMS | Solution: This KB article will take Volume Sample model as an example to show you the procedure to Publish Plan in PIMS.
1. Launch Windows Service Access by going to the location C:\Program Files (x86)\AspenTech\AspenEIF\SDK\bin, then click on Windows Service Access.
2. Choose Subscribe radio button, and enter topic 'Repository.PIMS.Plan', click OK
3. Open Volume Sample model.
4. Open Model Execution dialogue box, choose case 001,002, generate matrix, solve matrix and click OK.
5. After execution, select menu item Integration->Publish Plan. Verify the Publish Plan interface is displayed.
6. Choose case 002, choose Operation in Plan Type drop down list and click OK. Publish successfully message should pop up.
7. Check that the SupplyChainProductionPlanV2008.xml file genereated in the model folder. SupplyChainProductionPlanV2008.xml is generated in the model folder. (It also depending on the turnonlog xml is registered or not)
8. Open the SupplyChainProductionPlanV2008.xml file, and it only contains the data for case 002.
Keywords: Publish Plan, PIMS, SupplyChainProductionPlan, Windows Service Access
References: None |
Problem Statement: Sometimes the historian files get corrupted, this can be due to many reasons including power failure. In general, customers will notice that although they can start the database without indication of a problem, when they try to view the data using Aspen Process Explorer or Aspen SQLplus they will get disk history errors.
In such cases, you can try to repair these archives as described below. | Solution: Open the Aspen InfoPlus.21 Manager and start the database
Click in Actions>Repair Archive
Select the repository containing archive file sets to be repaired
Click Next
Select the archive file sets to be repaired - for each file set decide whether to allow extension of the end time - see How should I answer the question Allow extension of fileset end time? when using the Archive Repair Wizard?
Click Finish
The choice of file sets to repair rather depends on the time span of the plots or SQL queries that are exhibiting the errors. You should repair file sets on either side of the problem time period as well.
Keywords: Historian
Corrupted files
Disk history read error: -1020
References: None |
Problem Statement: What is the use of table _ZBIASRESULTS in APS? | Solution: If the PUB_BIAS_RESULTS keyword is set to 'Y' in the CONFIG table, period bias results are published to the _ZBIASRESULTS table. Previously bias results were published to the _BIASRESULTS table.
1. Add a keyword PUB_BIAS_RESULTS in CONFIG table, and set it as Y;
2. Set scheduled bias for any stream property in screen;
3. Add trend for this stream property to trend list (make sure the trend is added, or there is no publish data in _ZBIASRESULTS table)
4. Publish all results.
5. The results will be published in table _ZBIASRESULTS.
Keywords: None
References: None |
Problem Statement: Can I still open the Classic Flowsheets in PIMS V10? | Solution: Classic flowsheets are simple block flow diagrams of PIMS results that have always been available with PIMS. Although more modern options are currently available, the classic flowsheets are still available in Aspen PIMS V10 as well.
As mentioned previously, classic Flowsheets are very basic yet they can be used to display your current model as a block-flow diagram and/or to display linear-programming results in a block-flow diagram. They are located on the model tree Flowsheets tab.
There are 2 types of Flowsheets available in PIMS V10: Model.flo and Results.flo.
Model.flo that is generated from the Validation reports. When working with this file is important to keep in mind that PIMS must make certain assumptions as to whether streams are feeds or products because the model has not been run. In order to observe this report, make sure you are working in PIMS DR and follow the next steps:
1. Go to Model Settings| Reporting and select FLO option
2. Go to Menu Run | Data Validation and Run the data validation report
3. You will be able to access the Model.flo flowsheet
Results.flo is generated from theSolution reports is titled Result.flo or Result###.flo for case-stacked results.
1. Go to Model Settings| Reporting and select FLO option
2. Go to Menu Run | Start Model Execution and Run the cases you want to analyze
3. You will be able to access the Resutls.flo flowsheet
Keywords: None
References: None |
Problem Statement: Is there any way to allow me install PIMS patch silently? | Solution: Yes, we could silently install PIMS patch on the machine.
Eg, we want to install CP1 silently for PIMS V10. Please refer the steps as below.
1. Open CMD and run with administrator.
2. Please refer following command to install the patch.
The first command should point to the patch location.
Then using the 2nd command to start installation.
3.You may check in Task manager to see if you could find following process.
Then the patch will complete the silent installation.
Keywords: Patch, silent installation
References: None |
Problem Statement: How to do model comparison on matrix level in PIMS | Solution: To do model comparison on matrix level, there are two tools we can use in PIMS:
1. Matrix Comparison Function:
PIMS provides matrix comparison function under Run menu. By selecting the matrix files from model folder, PIMS will create a report to include all the differences between two matrices.
2.Solution Browser:Solution Browser provides a different way to view modelSolutions on matrix level. We can useSolution Browser to view one, two or multiple case results:
View one, two or multiple case results
Blue ribbon: singleSolution
Two blue ribbons: side-by-side (compare two cases)
Red and blue ribbons: show variations between cases (one-to-many comparison)
Keywords: None
References: None |
Problem Statement: How can I add Annotations to a Plot in A1PE? | Solution: To add annotations to a plot:
Click the New (“+”) icon under Notes in the Annotation Panel and then click the Annotation icon. The annotation is added to the center of the plot, where you can move it as desired as shown in the below screenshot.
-Or-
Position your mouse cursor at the desired location in the plot. Press and hold the left mouse button for approximately two seconds.
Please note the following.
- Annotations are labeled from the letter ‘A’ consecutively.
- Multiple Annotations can be added to a plot.
Keywords: Annotations
A1PE
References: None |
Problem Statement: How do I customize stream properties for all my streams in a HYSYS case? | Solution: To customize the stream properties for all the streams in your case, follow the steps outlined below:
Start HYSYS. Go to File | Options | Simulation and uncheck the last two checkboxes under Stream Property Correlations group (Activate correlations for standard, Black Oil and Electrolytes and Confirm Before Adding if Active Correlations are Present).
Open your HYSYS case and open one of the material streams. Go to the Worksheet | Properties page of the stream's property view and check that none of the properties are displayed. If you see any properties still displayed, go to Home and in the Simulation section display the whole option to open the Correlations Manager and click on Remove All Global Correlations (the button with three red crosses under Correlation Controls (Global)). This should remove all of the properties from all of the streams in the active case.
On the same page (Worksheet | Properties), add the correlations you want and in the order you want by clicking on the Append New Correlation (green plus sign under Property Correlation Controls). Then click on the Save icon to save your correlation set to a file; the default name given to the set will be <stream name>-CorrSet. You can choose to keep the default name or provide your own name.
Go to Tools | Correlation Manager and click on View Global Correlation Set List (the Open folder icon) under Stream Correlation Set Controls (Global). Select the correlation set from the Available Stream Correlation Sets and click Apply. Save the case.
This will apply the correlation set you created to all of the streams in that case.
For more information on the Correlation Manager please refer to the Help guide inside of HYSYS.
Keywords: Correlation Set, customize, stream properties, correlation manager
References: None |
Problem Statement: How to place an Annotation over a range of time in A1PE? | Solution: To place an Annotation over a range of time:
After adding an annotation, click and hold the Annotation flag. A Prime annotation that marks the end of a time range of interest is created as shown below.
Drag the Prime annotation flag to some point after the beginning annotation.
If the “Prime” annotation is placed before the related, beginning Annotation, then the two are swapped
Keywords: Annotation
A1PE
References: None |
Problem Statement: What is the definition of stable/unstable node and saddle in Azeotrope Search? | Solution: When talking about Residue Curves, pure components and azeotropic points are called nodes. Three different types are possible:
Stable node: This is the pure component or the azeotropic point with the highest boiling temperature and lowest vapor pressure in a distillation region. All residue curves end at stable nodes.
Unstable node: This is the pure component or the azeotropic point with the lowest boiling temperature and highest vapor pressure in a distillation region. Residue curve never reach an unstable node.
Saddle: These are pure components or azeotropic points with an intermediate boiling temperature and vapor pressure in a distillation region. Residue curves move toward and then away from saddles but saddles are never end points. Only border lines start or end at saddles.
Source: https://en.wikipedia.org/wiki/Residue_curve
Keywords: Stable Node, Unstable Node, Saddle, Azeotrope Search, Residue Curve
References: None |
Problem Statement: Although I give a limit of maximum pressure drop through the shell/tube side, EDR still calculates a | Solution: with a larger pressure drop. Why EDR ignores my input in allowable pressure drop?
Solution
EDR allows the use to input an allowable pressure drop for shell side and tube side under Input – Problem Definition – Process Data.
However, the allowable pressure drop is only going to work when you’re running the design mode. The allowable pressure drop will enforce a limit to the maximum pressure loss. The calculated exchanger design will follow this restriction.
If you are running the simulation mode. EDR will calculate whatever pressure drop that is determined by the exchanger geometry. Here allowable pressure drop is only an optional input. If the calculated pressure loss is greater than the value you supply, then you will get a warning message saying that the calculated pressure drop exceeds the maximum allowable pressure drop.
Keywords: None
References: None |
Problem Statement: Is it ok to install 3rd party views on our Aspen MBO database? | Solution: The publish tables are open interface tables to allow users to read the data for reporting/interface purposes only. There should not be a problem if the 3rd party views are neither writing data to the publishing tables nor touching the core tables.
Adding views that only read data from above mentioned tables and do not lock the tables with exclusive access from the 3rd party views should be fine.
Please make sure they do not open database transactions to lock these tables when a 3rd party tool is reading data from APS/MBO tables.
Keywords: None
References: None |
Problem Statement: How to move and remove Annotations in A1PE? | Solution: 1. To move an annotation:
On the plot, click and drag the annotation to the desired location.
2. To remove an annotation:
a. On the plot, drag it to the right, off the plot
b. Or highlight it in the Notes pane and click the Delete icon as shown below.
Keywords: Annotations
A1PE
References: None |
Problem Statement: Why can’t I use Activated Economics in Aspen HYSYS or Aspen Plus? | Solution: In some instances, Activated Economics in Aspen HYSYS or Aspen Plus will be completely disabled, which usually means that all the options in the Economics ribbon will be completely greyed out. This includes being unable to turn on the Economics analysis and being unable to use the Send to APEA button.
This happens because the current version of Aspen HYSYS or Aspen Plus is not compatible with the installed versions of Aspen Process Economic Analyzer (APEA). It is important to always have installed the same version of APEA as the version of HYSYS/Aspen Plus that is currently being used.
This means that, for example, when using Aspen HYSYS or Aspen Plus V10.0, to use Activated Economics, the user’s computer should also have APEA V10.0, otherwise Aspen HYSYS/Plus will not connect to the program.
If this version is not installed, then Activated Economics will not be available, even if other versions (like V10.1) are installed. To solve this issue, simply install the appropriate version of APEA compatible with Aspen HYSYS or Plus
Keywords: Grayed, Unable, Economics, Evaluate, Send to APEA, Activated
References: None |
Problem Statement: It has been observed that the Aspen Process Data Service keeps re-appearing in the Configured Services list for a data source in the ADSA, even after it had been removed. When it is present, it causes Aspen Process Data Add-ins to fail. How can it be prevented from sneaking back in when no one is looking?
This Knowledge Base article shows how to prevent Aspen Process Data Service service from re-appearing in the ADSA. | Solution: Functionality of the Aspen Process Data Service in the ADSA is dependent on a Windows service by the same name.
If you do not want the Aspen Process Data Service to re-appear in the Configured Services list for a particular data source in the ADSA, please change the Startup Type option in the Windows Services snap-in for the Aspen Process Data Service (service) to Disabled.
Keywords:
References: None |
Problem Statement: How to customize the stream line color in HYSYS flowsheet based on stream type? For example, feed stream: light blue, normal stream: dark blue (default), steam: light green, product stream: dark green, waste water: pink, waste gas: brown, etc.
Root Cause
HYSYS provides several built-in Process Flow Diagram (PFD) color schemes (Default Colour Scheme, Dynamic P/F Specs, Hydrate Formation, etc.) for some common applications. However, there is no built-in PFD color scheme to fulfill this usage requirement. | Solution: First of all, user should create a user variable (name: stream color), assign different user variable values to different streams for distinguishing the types of streams. For example, empty: normal stream, 1: feed stream, 2: steam, 3: product stream, 4: waste gas, 5: waste water. (Please refer to theSolution article for further information about user variable: KB 000028782 What are user variables and how can I use them?)
Figure 1. User Variables (Stream color) creation and value assignment.
Then useSolution article (KB 000031357 How do I add a new color scheme?) knowledge to create a new color scheme and select User Variables (Stream color) as criteria. In Conditional Formatting window, specify the color range and click ‘OK’, the stream line color change based on this new color scheme. ‘Atmospheric crude tower-stream color.hsc’ in Attachments is the HYSYS V9 example file of thisSolution and figure 2 shows the final performance of this customized color scheme.
Figure 2. The customized color scheme based on User Variables (Stream color).
Keywords: Color scheme, Conditional formatting, User Variables, Flowsheet, Process Flow Diagram (PFD), Stream line
References: None |
Problem Statement: Why is the water Latent Heat of Vaporization calculated by HYSYS sometimes different from the values in the Steam Tables? | Solution: To evaluate and/or report the Latent Heat of Vaporization of a pure water system in HYSYS, we generally recommend using one of the Steam Table property packages, particularly if you are interested in comparing the results to a specific reference (e.g. paper, steam tables, text book etc.). Still, you may find small differences because the versions of the Steam Tables used by HYSYS and the ones you are referring to might be different.
Generally speaking, the Heat of Vaporization of water calculated by an activity model in HYSYS, such as the NRTL model, should match the values in Steam Tables better than those calculated with Equations of State (EOS). This is because that activity models use the Cavett (empirical) method for enthalpy calculation based on Steam Table data for liquid water systems, while no such a direct connection to Steam Tables is applied for the EOS models.
Keywords: latent, water, heat, vapourization, vaporization, steam, table
References: None |
Problem Statement: How to resolve the pop up error received in Excel -Run Time Error '1004': Cannot edit a macro on a hidden workbook, unhide the workbook using the unhide command ? | Solution: This problem is caused due to a setting enabled in PIMS, this issue can be resolved by disabling the Excel add in setting in PIMS.
1.Open PIMS > Tools >
2. Go to Program Options (Spreadsheets) > Enabling “Do not load installed Excel Add ins on launching Excel” , The purpose of this setting is for if you are an Excel 97 or earlier user, and you are having problems loading Add-Ins via automation. Selecting this option prevents Excel from loading Add-Ins when invoked by PIMS.
On enabling this setting, it will prevent Excel from loading Add-Ins when invoked by PIMS. This will resolve the issue and you will be able open all PIMS models without this Macro pop up window and be able to successfully run the cases.
Keyword
1004, Run-time, PIMS, Excel, Macro, unhide
Keywords: None
References: None |
Problem Statement: How do I create a stream or unit operation Results Table with a set of user default variable in Aspen HYSYS? | Solution: When you right-click on any stream or unit operation icon in the Flowsheet and select Show Table, a default properties set Result Table appears. You can modify the set on properties for each stream/unit operation, but when adding a new Result Table, it will contain the default properties set.
To modify the default set:
Go to File tab, Options | Simulation and scroll down to PFD Tables Content and Formats.
Select Material Stream and check the variables you want to add or remove. You can do the same for Energy Streams or any Unit Operation of your Flowsheet.
Go back to the Simulation environment and add again the Stream Results Table to see the changes.
To modify the formal of the table (color, type, size), please review this article: How do I change the format of all the PFD Tables in an Aspen HYSYS model?
Keywords: PFD Tables, workbook
References: None |
Problem Statement: Where can I find a list of the functions used by the Spreadsheet? | Solution: You can find a detailed list of functions and syntax used in Spreadsheet Operation by pressing on Function Help located at the bottom of Spreadsheet window.
Keywords: Spreadsheet, Functions
References: None |
Problem Statement: How can I customize my unique AspenHysys workbook template and apply it to multiple simulations? | Solution: Follow the steps to create customized Workbook view in
Knowledge Article 109088-2: How do I create a custom tab in the workbook?
To set it as a template for repeated use, on the Export tab, select either the Workbook or Pages option.
If Workbook option, give it a file name and select a folder to save in. It will be saved as *.wrk extension.
Note: user might not be able to save in the AspenHysys default folder without administration rights.
If Pages, check the boxes of pages as required and click to export. Save in selected folder. It will be saved as *.wrk extension.
To use saved template in a different AspenHysys simulation, on the Workbook Import tab of the new AspenHysys simulation, select either Workbook or Pages.
Point to the folder where template is saved and open.
This will populate the Workbook view with the customized Workbook set up.
Keywords: Workbook, template
References: None |
Problem Statement: This Knowledge Base article provides steps to resolve the following error:
“Failed to validate install, install directory: xxx
which may be encountered when one attempts to upgrade a 32-bit version of the Aspen InfoPlus.21 database to a 64-bit version. | Solution: When upgrading from a 32-bit to a 64-bit version of Aspen software, you must first uninstall the 32-bit version, reboot the server and then install the 64-bit version. This is as designed and as expected because there is no direct upgrade method from a 32-bit version to a 64-bit version.
To summarize: The fix for the above-mentioned error is to uninstall the 32-bit version, reboot the server and then install the 64-bit version.
Keywords: None
References: None |
Problem Statement: What are the recommendations of Recycle Efficiency and PV Work Term for full liquid systems? | Solution: For full liquid system, the recommendation for the recycles efficiencies in the depressurizing utilities is 1% for each phase and for PV Work Term is 60-70%.
Keywords: Recycle Efficiency, PV Work Term
References: None |
Problem Statement: The TRANCOL report was not previously available for PIMS-AO executions | Solution: V10 now allows generation of TRANCOL reports for PIMS-AO executions. These reports can be viewed in the traditional Excel, HTML, or TXT formats. Alternatively, the new AO Marginal Analysis Viewer can be used which allows you to perform what-if scenarios by seeing results when swapping independent and dependent variables.
To activate the traditional format reports, select them on the Reporting Output tab as shown below.
To activate the report generation without writing to the database, the Create XLPTC option must be turned. This saves database storage space.
Keywords: None
References: None |
Problem Statement: When doing tray design in Aspen HYSYS, I got below warning even I have KG-Tower software installed and running.
How to activate KG-Tower in HYSYS? | Solution: The issue is basically that HYSYS does not support KG-Tower versions released after that HYSYS release. For example, Aspen HYSYS V7 and V8 do not support opening KG Tower V5.1 from within HYSYS. You need to upgrade HYSYS to newer versions (like V9 or V10).
Keywords: KG-Tower
Version
Activation
References: None |
Problem Statement: Starting from Aspen InfoPlus.21 cumulative patch V7.3.0.3 and higher, there Is an application that allows the user to redefine certain Aspen InfoPlus.21 folder locations. This is to help users who do not want these folders to be in the Microsoft default locations in the system drive.
The Aspen InfoPlus.21 Profile Configuration application db21\code\IP21ProfileConfiguration.exe can redefine the InfoPlus.21 Data Root folder and some additional child folders by creating the AspenTech\InfoPlus.21\IP21Profiles.xml file.
Which Aspen InfoPlus.21 folder locations are defined in the IP21Profiles.xml file? | Solution: The following folder locations are defined in the IP21Profiles.xml
<IP21 Data Root>
Aspen InfoPlus.21 root folder. Other folders locations are derived from this folder.
<IP21GroupFolder>
Aspen InfoPlus.21 group folder where snapshots, out and error files are located.
<SQLplusCompressedSource>
Location of the Aspen SQLPlus compressed query source files.
<IP21HistorianDataRoot>
Location of Aspen InfoPlus.21 historian file set folders.
<IP21RepositoryData>
Aspen InfoPlus.21 Repository data files location. [Config.dat, Map.dat, tune.dat]
Keywords: Group 200
IP21Profiles
References: None |
Problem Statement: How to exclude NobleNet Portmapper service from IP21 Health Check monitoring? | Solution: 1. Edit the file ..\AspenTech\InfoPlus.21\db21\etc\ ServicesList.cfg
2. Comment the line “NobleNet Portmapper for TCP;NobleNet Portmapper for TCP
3. Stop\start TSK_HLTH
Keywords:
References: None |
Problem Statement: When using Calculator block in Aspen Plus, a warning message Disable FORTRAN BLOCK RESULTS due to variable accessing or Disable FORTRAN BLOCK OUTPUT due to variable accessing showed in Control Panel and this block never executes. How can this problem be fixed?
Root Cause:
This warning message indicates that the Calculator block is using a deactivated object information, which is not permitted. Please refer to our knowledge base article What does it mean to deactivate a block? (Article ID: 000024251) for detailed information about the deactivate feature. | Solution: Try to activate all the streams or blocks that the Calculator block is trying to use.
Keywords: Aspen Plus, Calculator, Deactivate, Fortran
References: None |
Problem Statement: How to resolved the problem that Reported Compositions in Aspen Plus Do Not Reflect Specified Input? | Solution: To avoid this problem, make sure that feed composition inputs add up to unity
Calculate one component composition by difference (1 – xxxx).
Normalized the composition in Excel before sending to Aspen Plus.
To copy all stream composition values at once, you can use Excel copy-paste to copy the composition values and paste them all at once onto your input value table. You can do some simple automation so that you don't have to do the highlight-copy-highlight-paste.
Keywords: Aspen Plus, ASW, Compositions, Input
References: None |
Problem Statement: When any DMC plus system is upgraded from lower to upper version, the old license file needs to be replaced with a new file. Once the replacement is complete, whether or not the DMC plus/DMC3 applications are able to acquire the license and working fine needs to be ensured. The steps to validate the same is mentioned in this | Solution: .Solution
To validate any DMC plus/DMC3 application after an old license file is replaced with a new one, following steps are to be performed on the machine:
DMC Plus application
1. If DMC+ Model is installed on the machine where file is replaced, start this program through Start\Programs\Aspentech\
a. If DMC+ Model is started successfully, then the license checked-out is correct and PASS.
2. If online DMC+ controllers are installed and running, observe the ACO messages and confirm if there are any license check out errors. If there are, observe or capture the valid.err message after 90mins. After 90mins, DMC+ controllers should not show license error again. If you continue to see license error message after 90mins,
a. Request control room if the controllers can be restarted.
b. Escalate this to the management so that measures can be taken to resolve the issue.
c. ** Online controller will continue to run for 10-days without license. **
3. PASS if validated successfully.
DMC3 Application
The above confirmation steps are applicable for DMC3 application as well. Please follow the below for DMC3 application:
1. Start the DMC3 Builder program. Once it is successfully started, it confirms license checked out successfully and PASS
2. For online DMC3 application, observe PCWS message section for any license error. Usually, controller will acquire license within 1st cycle of execution.
In case there is a license error -
a. Make sure that the new license file has DMC3 key - SLM_RN_APC_DMC3
b. Make sure that bucket containing DMC3 key is configured to be checked out on run time.
c. In case the problem persists, please contact AspenTech support.
Keywords: Validate
DMC plus applications
DMC plus license
DMC3 license
References: None |
Problem Statement: When I do a simple Copy and Paste a plot into Excel, I find that I cannot edit or move the plot. Why does this happen and what do I do if I want to make changes? | Solution: When you copy a plot it is saved as a bitmap.
Using a simple paste in Excel, it assumes that the plot is an Activex Object and that is how it is pasted by default. Alternatively you can use Paste Special instead of a simple Paste (from the Edit menu choose Paste Special, or use the right mouse button on the spreadsheet and choose Paste Special) and paste as Picture (Enhanced Metafile) in Excel. You can then move, edit and enhance the plot as you wish without going into design mode. The plot is now a picture rather than an Activex object. According to Excel's context help, this is also the preferred way of using the pictures because the print quality is better and it takes less space.
Keywords: None
References: None |
Problem Statement: How do you manually change the authentication mode of SQL Express to SQL Server Authentication Mode? | Solution: There are two possibleSolutions to this problem.Solution 1
AspenTech applications require Microsoft SQL Server Express to be installed with SQL Server Authentication Mode in order for Aspen Properties Enterprise Database (APED) to function properly. Check the aspenONE Installation guide for the version of SQL Server Express that is supported for that particular version of aspenONE.
The following steps need to be done:
1. The value of HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL11.SQLEXPRESS\MSSQLServer\LoginMode must be set to 2
Note: On x64 machines that install 32bit version of SQL Server, the registry key falls at HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft SQL Server\MSSQL11.SQLEXPRESS\MSSQLServer\LoginMode
2. The SQLExpress service must be restarted once this registry entry is manually changed.
Solution2
On SQL Server Express, the user interface for configuring the server is not installed by default. If you do not have it, you will need to download the SQL Server Management Studio Express application from Microsoft:
Once you have downloaded SQL Server Management Studio, do the following steps:
1. Run SQL Server Management Studio Express. The Connect to Server window will appear.
2. Select the server name and Windows Authentication. Click Connect. The Microsoft SQL Server Management Studio Express window appears.
3. In the tree on the left, right-click the name of the server and select Properties. The Server Properties dialog box appears.
4. At the left, click Security.
5. Under Server authentication, select SQL Server and Windows Authentication mode, and click OK.
6. In the tree on the left, right-click the name of the server and select Restart. The SQL Express service restarts.
Keywords: SQL Server Express, APED, Aspen Properties
References: None |
Problem Statement: Ramp-handle MVs with Test Swtich set to OFF seem to be stepping when in calibrate mode | Solution: This behavior is by design. When a controller is in Calibrate, the level is treated by the engine as a programmed imbalance so it would float around rather than controlling at setpoint. When the level is close to a limit, the controller will calculate MV moves in order to balance the ramp and turn it around. An MV with it's test switch OFF not used for generating steps, but it would still be used to keep the CVs within limits. However, the MV moves calculated during Calibrate/SmartStep are subject to an internally calculated move reSolution (MOVRES), which results in the control moves being implemented as discrete steps instead of continuous MV moves. This is and attempt by the engine to reduce the auto-correlation in the resulting data by making correcting moves appeared like steps so it can still be used during Identification. When in DMCplus control mode, the controller resumes the normal calculations, thus the MV will start moving continuously to balance the level and keep it at the ramp setpoint.
Keywords: Ramp-Handle
Calibrate
References: None |
Problem Statement: How do I copy record security permissions using IP.21 administrator and then paste them to another record? | Solution: Make sure you have Change Security user rights.
Right click and select copy permissions from the source record.
Then right click on the database (first branch in the administrator) and choose paste permission. A pop-up screen will appear, into which you can drag & drop the destination records to which you want to paste the permissions.
More information can be found in the IP.21 Administrator help file: Assigning a Security Setting to Selected Records.
Keywords: copy
paste
security
permissions
References: None |
Problem Statement: What is the Difference Between a Hypocomponent and a Hypogroup in HYSYS? | Solution: A Hypocomponent is a single pseudocomponent. A Hypogroup is collection of individual Hypocomponents. Hypogroups are useful because the Hypocomponents within the Hypogroup can be edited all at once using the Hypotheticals Manager (accessed from the Home ribbon). For example, the Heat of Vapourization method used for all Hypocomponents in a given Hypogroup can be set (as Default, Chen, Pitzer, etc.) in one step. Additionally, a large group of Hypocomponents contained in a single Hypogroup can be imported to or exported from a HYSYS simulation.
Keywords: None
References: None |
Problem Statement: What are the new external tasks added to Aspen InfoPlus21 Manager starting from V9.1?
TSK_ALRT
TSK_PMON
TSK_ROOTCAUSE | Solution: The tasks TSK_ALRT, TSK_PMON, and TSK_ROOTCAUSE are added starting from V9.1 are related to the Alerts, Pattern Matching, and Persistent alarm functionality respectively which provides added functionality to aspenONE Process Explorer. For more information related to these tasks refer to Aspen InfoPlus.21 Manager help file.
Keywords: new tasks
TSK_ALRT
TSK_PMON
TSK_ROOTCAUSE
References: None |
Problem Statement: How do I delete an ABE workspace? | Solution: Delete the workspace from the AdminTool using the right-click menu on any workspace. Please note, this is only recommended to be performed by ZyqadAdministrators.
If the workspace just deleted connects to either a SQL Server or Local DB Server, please use the SQL Management Studio to delete the actual database instance as well. (This should always be the second step, and might require assistance from DBA to do so). The recommendation is that a user create a new DB for every new workspace, for ease of use and fewer database corruptions issues, if any arises, and if that procedure is followed, you will be required to delete only a single specific database. For any ABE workspace, you will see a DB Table list similar to image below. This can be used as a step to identify the ABE database that needs to be deleted. For Oracle, please use the management tool as is specified for its usage, to do the same.
Locate the workspace libraries folder installed on the ABE Server. The folder is called AspenZyqadServer and within the folder navigate to AspenZyqadServer| Basic Engineering19.1|Workspaces (Please not the version number depends upon the version of software that is installed. Here in the example, we have used a V10 example). Navigate to the folder for the deleted workspace. The folder name is usually the same name as the workspace. Delete this folder and its contents.
Keywords: Cleanup workspace
References: None |
Problem Statement: Can DMC3 Builder import .prd file (DMCPlus Model prediction file)? | Solution: No. DMC3 Builder cannot import a .prd file.
However, DMC3 Builder can import .cas file (exported cases from DMCplus Model) and these cases after import in DMC3 Builder can be run to get predictions.
Keywords: .PRD
.CAS
Predictions
References: None |
Problem Statement: Can I add new CVs to the controller without revising the Foxboro bridge database and the DMC DCS graphics? | Solution: New CVs can be added to the controller if the CV measurements can be read directly from the OPC server using Cimio for OPC instead of using the FoxBridge interface.
It is also important to note that adding a CV to a controller without updating the FoxBridge and DCC Graphics is not recommended. This is because the new CV will not be displayed on the DCS graphics (as it is not a part of FoxBridge) and therefore the operators would not be able to monitor and maintain the CV (limits) using the DCS graphics. They may however still interact with the new CVs using the Aspen Web Interface (PCWS).
MVs would need additional interface parameters and logic that are part of FoxBridge and therefore cannot be added to the controller without changes to the FoxBridge and DCS graphics.
Keywords: Foxboro Bridge
References: None |
Problem Statement: Is the calculated Mach number based on mass (design) flow or rated flow? | Solution: Aspen Flare System Analyzer calculates the Mach number of all pipes based on the specified mass (design) flow.
However, if the user decides to use the relief valve’s rated flow for tailpipes, the Mach number for the pipes specified as tailpipes will be calculated based on rated flow.
ThisSolution illustrates two cases for the same Aspen Flare System Analyzer model. The first one, Case 'A', shows the calculated value for Mach number of pipe segments specified as tailpipes and for which Mach number is calculated based on rated flow, whilst Case 'B' has no rated flow specified for tailpipes.
1) Case 'A':
All pipe segments downstream of sources (pressure safety valves / control valves) are specified as tailpipes on the Inputs | Pipes summary.
Next, on the Calculation Settings Editor, tailpipes are specified to use rated flow. Notice that other than the specified tailpipes, no other pipe segments will make use of rated flow, but of mass (design) flow.
The model is run and the 'Mach Number' label is added to show the calculated Mach number of all pipe segments. Note that for 'Tailpipe 1' the calculated inlet and outlet Mach numbers are 0.323 and 0.423, respectively.
1) Case 'B':
All pipe segments downstream of sources (pressure safety valves / control valves) are specified as tailpipes on the Inputs | Pipes summary, just as in Case 'A'. The difference here is that on the Calculation Settings Editor, the 'Rated flow for tailpipes' checkbox is cleared, so all pipe segments in the model are set to work with mass (design) flow, even if any pipe segment in the model is declared as a tailpipe in the Inputs | Pipes summary.
As in case 'A', the model is run and the 'Mach Number' label is added to show the calculated Mach number of all pipe segments. Note that for 'Tailpipe 1' the calculated inlet and outlet Mach numbers are now 0.311 and 0.396, respectively.
Keywords: Mach Number, Mass Flow, Design Flow, Rated Flow, Tailpipes
References: None |
Problem Statement: How to minimize breaking links between ASW workbook and (Aspen Plus, Aspen HYSYS or Aspen EDR) model variables?
Root Cause:
The links between ASW workbook and simulation model variables can be broken in many ways. The best practices followed by root cause explanation show in “ | Solution: ” section.
Solution
1) Do not edit a simulation while developing the ASW interface.
- Problems may occur if you change the paths or delete variables that are linked in ASW, and in turn, this may cause ASW links to stop working.
2) Never save a simulation with a new name while it is open in Aspen Simulation Workbook.
- This will result in broken links the next time you open the ASW file.
3) Do not save an ASW workbook if its associated simulation crashed during a run.
- This could cause all ASW links to become broken.
4) Be careful when putting formulas in ASW table cells.
- Never put formulas into cells used to report results.
- The formula takes precedence, so results will not get updated.
- Formulas in tables will slow performance.
- Excel runs many more calculations to ensure results are fully updated.
- When possible, put the formulas outside ASW tables.
- Try to put these kinds of calculation in Spreadsheet of HYSYS or Calculator of Aspen Plus instead.
5) Do not put too many (e.g., 200+) variable tables into one workbook.
- It is better to include a smaller number of tables with more variables per table.
Keywords: Aspen Simulation Workbook, Best Practice, Tip, Formula, Variable Table
References: None |
Problem Statement: If closed by accident, how do I re-display the Model Palette in Aspen Plus? | Solution: In Aspen Plus, there are two methods to turn the Model Palette on and off:
The hotkey (shortcut) method: Press the F10 key to toggle the Model Palette
The manual method:
In the Simulation Environment
Click the View tab in the Ribbon and then click the Model Palette button
You may hover the mouse pointer over the Model Palette button to see the Hotkey (F10) and a short description
Keywords: Aspen Plus, Hotkey, Shortcut, Model Palette, F10
References: None |
Problem Statement: APC controller with direct OPC connection can not write to certain DCS tags while CIMIO for OPC can. The observed error status is failure with E_BADTYPE | Solution: For certain OPC server, a Write from a client has to match data type of the DCS point before the written value is accepted. A mismatch data type will result in a write failure with an error status E_BADTYPE. Reading the same tag returns the valid value with no error status.
CIMIO for OPC is an OPC client but it is more flexible in accepting and writing to the DCS OPC server. A mismatch data type while using CIMIO for OPC doesn't result in a write failure.
In cases where direct OPC results in a write failure with an error status E_BADTYPE while write through CIMO fof OPC work perfect, try to change the configured data type of the tag to match the DCS data type.
Keywords: Direct OPC
E_BADTYPE
References: None |
Problem Statement: What does the Yld checkbox do in the Schedule Bias Dialog in APS? | Solution: If you select the Yld checkbox, the formula used is:
Biased Yield = Current Yield + % Factor * Current Yield
The Constant column is ignored and the factor is assumed to be percent.
For example if the Factor is 1.5 and the yield is 8.0 then
Biased Yield = 1.5/100 * 8.0 + 8.0
This is a different formula than if the Yld checkbox is not checked:
Biased Property = Factor* Property + Constant.
Keywords: None
References: None |
Problem Statement: I have a spreadsheet used to define a stream's composition. Adding a new component to my simulation (from the Properties environment) causes the simulation to unsolve when the Simulation environment is re-entered. Why is this? | Solution: When a user inputs compositional data into a stream (from the composition input form), the stream object is able to modify this data (if necessary) to normalise the stream compositional data (i.e. the stream data can be changed, but maintained in the same proportions such that their sum is equal to unity). A key feature in this normalisation is the ability of the stream object to set the <empty> data cells to zero (0.0000) for one (or more) components.This is done prior to the flash calculation associated with the stream object.
When a new component is added to the simulation, all the streams in the simulation (for which the component list is applicable), will initially assign an <empty> value, then automatically overwritten by a zero value for the composition. However, when the stream compositions are linked to a spreadsheet, this normalisation does not occur. As such, any <empty> composition values are NOT converted to 'zero' values and the stream object cannot do the flash calculation. This will prevent the simulation from fully solving.
Keywords: New component, Simulation environment, Properties environment, composition normalisation, stream unsolving
References: None |
Problem Statement: An IQ application sets AZUFLAG to one to indicate a new analyzer update is received and validated, does it reset it back to zero? | Solution: When an IQ application with analyzer update module (AZU) receives a new analyzer reading and the analyzer reading passes the validation process, IQ sets the AZUFLAG parameter to one and writes it out to the DCS (if configured). IQ will only write out a one to the flag and only when it has a new, validated analyzer reading. The purpose of the flag is to let other users such as DMCplus know that there is a new, validated analyzer update. Since there is no way for IQ to know who is the end user, it is designed only to set the flag to one and not to set it back to zero. It is up to the end user (DMCplus or IP21) to reset the AZUFLAG to zero after it uses the new reading. Alternatively, if desired, the IQ can be configures to reset the AZUFLAG to zero using an input calculation (IC) logic.
Keywords: IQ
AZUFLAG
Analyzer Update
References: None |
Problem Statement: Since ADSA Directory Server version 7.0, there have been two protocol options available, DCOM and Web Service. You should choose the Web Service protocol if there is a firewall between your computer and the ADSA Directory Server. When you select Web Service and click the Test button, you get an error dialog box saying:
Web Service Not Found
(The ADSA Web Service is not installed on the specified computer)
The message hint should be tested to see if the ADSA Web Service is in fact NOT installed.
Open Internet Explorer and connect to the following URL (replacing <ADSA_Directory_Server_Name>, eg. for above example use SEHDCV1001):
http://<ADSA_Directory_Server_Name>/ADSAWebService/AdsaWebService.asmx
On a correctly configured system you should have got a list of supported operations but instead you are likely to get a resource cannot be found error because the ADSAWebService application does not exist on your ADSA Directory Server. | Solution: You must add the ADSAWebService application to IIS on the ADSA Directory Server.
Open IIS, navigate to the Default Web Site under the ADSA Directory Server's node and follow these instructions:
1. Right Click, select Add Application and populate the form with the following values:
· Alias = ADSAWebService
· Application pool = AspenAppPool
· Physical Path = %SystemDrive%\inetpub\wwwroot\AspenTech\ADSAWebService
2. Enable Anonymous Authentication within the Authentication feature for this new application.
3. Restart the IIS service.
4. Confirm all is now well by testing the service in Internet Explorer and ADSA Client Config Tool.
Keywords: ADSA Client Config Tool
Test
Protocol
Web Service
References: None |
Problem Statement: For Example, crude ABC is a CRDBLEND of 20% AAA and 80% BBB. AAA and BBB have SPG in table BLNPROP of 0.8156 and 0.8081 respectively. Hand calc of the ABC SPG is then 0.8096. However, in the full | Solution: report Purchases for a volume based model, the column Weight is using 1.0 as the SPG of ABC, instead of the correct SPG 0.8096. This results in the overall Recovery Wt% to be way off because the reported mass of crude is much higher than it should be. Why does this happen?
Solution
PIMS is using 1 as the SPG for the Blend because the entry in the CRDBLEND table won't prompt PIMS to calculate the whole crude properties, it is designed to compile the ASSAYS table. The whole crude SPG is not in the ASSAY table so it won't be part of the internal assay table that is created.
PIMS will not search the whole model for other whole crude properties and blend them. You can put the SPG of ABC in BLNPROP, as the mix ratio is fixed.
Keywords: None
References: None |
Problem Statement: How do I use the Export/Import feature in Aspen Flare System Analyzer? | Solution: Steps to Export:
1. Open the case file and go to File --> Export Case In.
2. Enter a file name such as 'C:\abc.mdb' . The path can also be defined using the browse option.
Additional Notes:
A. Out of three file options: .mdb, .xls and .xml; '*.mdb' format works fine in every case. The format *.xml does not work for greek letter such as ' α' so if you have greek letter change it to english letter or alphabet before exporting it in the format for *.XML. The *.XLS format might experience some issues with large files, so it is recommended to use *.xml or *.mdb format for export and import.
B. If the file is large, it will be quicker to uncheck all the option under PFSummary as well PFSummary. It makes the export process quicker.
3. Keep clicking the 'Next' Button, accepting the default options.
4. On the last page, choose the radio button Export data without saving definition file.
Steps to 'Import':
1. Open the case file or an old case file in Aspen Flare System Analyzer.
2. Go to File --> Import wizard. Click browse to locate the data file to import.
3. Keep clicking the 'Next' Button, accepting all the default options.
4. Again, on the last page, choose the radio button Import data without saving definition file.
Comment: If you want to import the file in excel, and the export/import wizard does not help, the file can be printed as text and then imported in excel. Refer toSolution id: 111422 for details.
Keywords: Export, Import, Wizard, Export Import, Export Import Wizard
References: None |
Problem Statement: How do I report viscosity in stream results in V9 and later version? | Solution: In order to report viscosity in stream results, you may follow this procedure:
1- Run the simulation.
2- Click Results Summery/Streams. Then, scroll down and click on <add properties>.
3- From the “Enter a search string”, select MU for the pure component viscosity or MUMX for the viscosity of the mixture from the Property Name checkbox list.
4- Click on Ok and close the window.
5- The results of the viscosity for the Vapor Phase and Liquid Phase will now be available under Results Summery/Streams.
6- In order to use this set of properties elsewhere and to retain these selections after closing the form, save it as a new template.
Please find the attached Cyclohexane-viscosity.bkp file to see the reporting viscosity in Results Summery/Streams.
Keywords: Viscosity, MU, MUMX
References: None |
Problem Statement: How to size a LNG (Plate Fin Exchanger) without importing an EDR model in Aspen HYSYS? | Solution: In Aspen HYSYS, if the Convert to Rigorous option is selected an EDR model is required.
To perform the design/sizing of a LNG or Plate Fin exchanger without importing an EDR model, follow these steps:
1. Go to the Simulation Environment and open the LNG operation
2. Go to Design | Parameters an select EDR-PlateFin
3. Map the LNG Pass Name streams with the EDR streams. Then click on View EDR Browser
4. In the Exchanger Design ribbon, click on Connected and then in Design. In this case EDR will be working offline with HYSYS.
5. Click on Change
6. Go to Problem Definition | Process Data and specify the outlet temperature for all streams.
7. In the Exchanger Design ribbon, click on the Run Button and verify the results are available. Then click on Working Offline, the connection with Aspen HYSYS will be restored.
8. Verify the <Connected> button is back
9. Make sure heat exchanger in Aspen HYSYS is solved, you might need to delete the outlet conditions you specified so EDR can overwrite those results.
Keywords: LNG, Plate Fin Exchanger, Sizing, EDR
References: None |
Problem Statement: In some instances, filter FIR model does not identify correct steady state gain for fast dynamics. | Solution: This is a well-known short-coming of FIR smoothing algorithm, it tends to may adversely affect model responses with fast initial dynamics, for example valve position models. The smoothing logic in FIR algorithm performs a trade-off between fitting the step test data as accurately as possible while not fitting large changes in the data (extremely fast dynamics). The Smoothing Factor (SF) parameter decides the extent of trade-off. Higher values of SF give more weightage to not fit faster dynamics. The results with the default SF of 5 would therefore not rise as fast as the unsmooth curves. All the smooth curves typically come out together with one gain and all the unsmooth curves are also together but with different gain. In such cases, it is recommended to edit the SF parameter to a smaller value than 5 in order to ensure that the smooth and unsmooth (SF=0) have approximately the same gain or use Subspace instead.
Keywords: FIR smooth filter
References: None |
Problem Statement: HPT plots show old controller names if the controller name is change in Aspen Watch. | Solution: The cause of the issue is that the Tomcat database used in HPT search is not automatically updated when the Aspen Watch/Infoplus.21 (IP.21) database is updated with the new controller name. The user would have to manually update this database by performing a re-scan of the database using PCWS, just like when new points are added to the IP.21 database.
Keywords: Aspen Watch
HPT search
References: None |
Problem Statement: What is the syntax needed when using VBA or Aspen SQLplus to create, query and display batches? | Solution: 1. Creating a Batch
The following SQLplus example creates a new APRM batch on data source server1 in area demo with batch number 987.
It sets the START TIME, END TIME and PRODUCT PLANNED characteristics.
It then creates a sub-batch, DUMP and sets characteristics UNIT, START TIME and END TIME of this sub-batch.
EXAMPLE:
local data_sources,batch,ch,subbatches,subbatch;
data_sources = createobject('AspenTech.Batch21.BatchDataSources');
batch = data_sources('server1').areas('demo').CreateBatch;
ch = batch.characteristics;
ch.add('BATCH NO',0,987);
ch.add('START TIME', 0, current_timestamp-1:00);
ch.add('END TIME', 0, current_timestamp);
ch.add('PRODUCT PLANNED', 0, 20);
subbatches= batch.subbatches;
subbatch = subbatches.add('DUMP');
ch = subbatch.characteristics;
ch.add('UNIT', 0, 'spy');
ch.add('START TIME', 0, current_timestamp-00:30);
ch.add('END TIME', 0, current_timestamp-00:10);
2. Querying Batches
The following SQLplus query prints the batch number of all batches in the last four hours in area demo on batch server server1.
EXAMPLE:
local data_sources,batchquery, batchlist,ch, i int;
data_sources = createobject('AspenTech.Batch21.BatchDataSources');
batchquery = data_sources('server1').areas('demo').BatchQuery;
batchquery.timerange.start = current_timestamp-4:00;
batchquery.timerange.end = current_timestamp;
batchlist = batchquery.get;
for i = 1 to batchlist.count do
begin
write batchlist(i).characteristics.item('BATCH NO');
exception
write 'No BATCH NO';
end
end
3. Querying configuration
The following SQLplus query prints all the defined characteristic for all areas in all batch data sources.
EXAMPLE:
local data_sources, area, char_defs, ds_num int, area_num int, char_num int;
data_sources=createobject('AspenTech.Batch21.BatchDataSources');
for ds_num = 1 to data_sources.count do
write 'Data Source: '||data_sources(ds_num).name;
for area_num = 1 to data_sources(ds_num).areas.count do
area = data_sources(ds_num).areas(area_num);
write ' Area: '||area.name;
char_defs = area.batchdefinition.characteristicdefinitions;
for char_num = 1 to char_defs.count do
write ' Characteristic: '||char_defs.item(char_num);
end
end
end
Keywords: Batch.21
Integration
code
API
Application programming interface
References: None |
Problem Statement: I want to specify a power law kinetic which depends on the reactants and on a catalyst concentration (homogeneous catalyst which is flowing with the other components). Suppose I am considering the following reaction: A + B --> C and I have a catalyst, which is D. The kinetic that I want to specify is, for example:
r = k * [A]^1 * [B]^2 * [D]^1
How can I specify that dependence on the catalyst concentration in Aspen Plus? | Solution: To define a reaction in Aspen Plus which is taking into consideration the catalyst concentration for a power-law kinetic, one has to create the reaction as POWERLAW or GENERAL type. You can select the catalyst as a reactant, but the stoichiometric Coefficient should be set to 0, so that it will not be consumed by the reaction, and specify the Kinetic exponent can be set to the desired value, which in this case equal to 1, according to the kinetic expression considered (see the image below).
For details about the component concentration and the pre-exponential factor units considered in the power-law expression, see theSolution 3781: 'What are the units for pre-exponential factor? Where is it documented?'
Keywords: catalyst, power-law
References: None |
Problem Statement: How do I set up a Particle Size Distribution (PSD) for solids modeling in Aspen Plus? | Solution: The attached Aspen Plus V8.8 demo will show you how to define a PSD and use user-guidance diagrams to ensure that the PSD mesh is appropriate for the defined distribution. There is an associated PDF to guide you through the steps.
Click here to play the demo.
This example will cover
· Creating a PSD mesh
· Defining a Particle Size Distribution (PSD) using data or a distribution function
· Checking PSD diagrams to make sure the mesh is appropriate for the PSD
Keywords: Solids Capabilities, Unit Operations, Set Up, Particle size distribution
References: None |
Problem Statement: How do I resolve the error Unable to Rename File TEMP.MPS to MPSPROB.MPS when I run a model in PIMS? | Solution: You could be seeing this message because the operating system might be temporarily locking the file. Please try to turn off the indexing and virus scanning for the model folder and this should help resolve the issue.
To turn off File indexing, follow the steps below:
Press Windows Key + S and enter indexing. Select Indexing Options from the menu. If this option isn’t available from the Search bar, you’ll need to access it from Control Panel.
Now you’ll see the list of indexed locations. Click on Modify button.
Uncheck the locations that you don’t want to index and click on OK to save changes. If needed, you can also check a new location from the file tree to add it to your index.
Keywords: None
References: None |
Problem Statement: Can V8 co exist with V7.3.2 on same computer? | Solution: Generally, major versions of Aspen Plus can run at the same time on the same machine. We have tested AES V7.3.2 and V8 running on same machine and both versions work in the presence of each other. AES V7.3 and earlier versions can also coexist with AES V7.3.2 and V8 and do not interfere with one another.
Keywords: Version inter operability, Version compatibility
References: None |
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