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Separation Process Engineering: Includes Mass Transfer Analysis, Fourth Edition by Phillip C. Wankat

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Appendix A. Aspen Plus Troubleshooting Guide for Separations

Although specific for Aspen Plus, many of these suggestions are helpful for other simulators. Although Aspen Plus is not perfect, probably 99% of problems with Aspen Plus are due to operator error. If Aspen Plus is too slow, close other programs, and close extra windows within Aspen Plus. If none of the correlations fit the equilibrium data, see Appendix B.

If something is not working, check the following:

1. Probably the most common error occurs when specifying streams. You must specify total flow and the composition of each component. The default for composition is molar flows. If the sum of the component molar flows is not equal to the total flow, Aspen Plus still runs the simulation ...

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