A problem in PRO for simulating the operation of extractors and distillation columns within a single simulation file
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Hello everyone, I am running an extraction column and a distillation column in a PRO file, and there is a conflict regarding the property methods. Is there any solution to this? The image below shows the error indicated by the software.
Isn’t the hint already very clear?
Adding VLLE to NRTL doesn’t work either
The property method you set is of the VLE type, but VLLE is set for the column; this is contradictory and makes calculation impossible. You can change the property method to the VLLE type, or roughly determine whether VLLE exists in the tower; if not, change it to VLE. Based on my experience, VLLE and VLE in the distillation column have little impact on the calculation results, but they have a significant influence on analyzing the distillation process using residual curves and ternary phase diagrams.
You’re absolutely right, but later I changed the material properties, and that didn’t work either. In the end I reopened the software and created a new model, and then it worked. It’s probably some kind of conflict with the software or the computer. Thank you! !