# TTC Technologies

## Concentric Tubes Heat Exchanger (Click image to enlarge)

#### Capabilities

• Calculation of the heat transfer rate
• Calculation of the outlet temperatures
• Single-phase analysis
• Two-phase analysis
• Boiling in tube
• Boiling in annulus
• Condensation in tube
• Condensation in annulus
• Multi-component analysis
• Plain tubes, Integral low, Finned tubes
• Hot fluid in annulus or tube?
• Parallel or counterflow?
• Tube length
For each fluid:
• Density, specific heat, viscosity, thermal conductivity (or selection of a fluid from the Database)
• Tube/annulus mass or volume flow rate
• Tube/annulus diameter
• Absolute roughness of tube inner and outer tube walls
• Thermal conductivity of tubes
• Fouling resistance in inner and outer tube walls
• Heat transfer rate
• Heat transfer area
• U and UA
• Effectiveness
• LMTD
• NTU
For each fluid:
• Velocity
• Reynolds number
• Heat transfer coefficient
• Nusselt number
• Friction factor
• Pressure loss
• Power
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