HeatX block

The volume of the tubes is estimated by assuming tubes 0.05 m in diameter and 5 m in length. The number of tubes required to give the necessary heat-transfer area is calculated and the inside volume of these tubes (35 m ) is used to give dynamics in the HeatX model. Shell volume is set equal to tube volume. In the Dynamics section of the HeatX block, the default is Instantaneous. Use the drop-down arrow to select Dynamics, and enter the inlet and outlet volumes on both hot and cold sides of the heat exchanger. 

The HEATX subroutine (block) of the ASPEN PLUS simulator is used to make the calculations. It has built-in correlations of the type described above for estimating shell-side and tube-side heat transfer coefficients and pressure drops. The following results are obtained (both streams are liquid) ... 

Process simulation units (that is, blocks, modules, or subroutines) are mapped into more descriptive models of process equipment (e.g., mapping a HEATX simulation unit into a floating-head, shell-and-tube heat exchanger mapping a RADFRAC simulation unit into a tray tower, complete with reboiler, condenser, reflux accumulator, etc.) and associated plant bulks, which include installation items, such as piping, instrumentation, insulation, paint, etc. 

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