CAPE-OPEN

Ghadi, I suspect the PSRK fitted group interaction parameters (GIPs) does not extrapolate to temperatures above 300 degrees C. Your incoming stream is 1400 C! I checked and the PSRK model flash worked up to 500 C but then its limits are reached, most likely because one of the GIPs approaches to valu...

I computed the first ratio incorrectly and as a result the product slate changed. I corrected the calculation and saw the flow ratio's needed to be 7.85 and 0.17. I then noticed that the rich liquid feed to the low pressure column was changing its quality (i.e. the ratio of L/V). This is because I h...

Yes it is possible but you need to carefully adjust two specifications for the low pressure column that is flow rate specific, namely the side stream rates out of the low pressure column to (1) the waste and (2) the argon side rectification column. I suggest you to first replace them by relative flo...

This is fixed with release 8v25 of ChemSep of 17th Feb 2021
-Harry

an interesting idea. I guess this should be fixed at the PME level? I mean CS/copp makes a whole set of properties available like the K values, enthalpies and entropies, as well as physical properties but it is the PME that should offer the choice to not all use a cocktail of propeties i.e. K values...

Why don't you share the collected validation data on the forum? Then there is more information to help you.

Harry

Please download and install a new ChemSep LITE. This weekend an update was made available that should help to fix the problem of not storing information.
-Harry

You should consider running parametric studies inside ChemSep. To do so, open up the column and go to the cape-open panel. First switch off Cape-Open properties. This will allow you to run parametric studies on the column. Then define your thermo again. Once you defined that, you can solve inside th...

Enter ChemSep gui. Please start the PCD manager by clicking on the Benzene ring icon. Now close the existing opened library with File-Close. Navigate to Edit-Add Pseudo. Select Kesler-Lee 1976 for the Tc and Pc, w and Mw. Use Riazi-Daubert 1980 for the Vc and CpIG. You can use Twu 1984 for viscosity...

There was a bug in the most recent version of ChemSep that caused the assignment of CAPE-OPEN parameters to fail. This is fixed. It is better to reconnect all information to ensure the parameters are passed on. I don't know whether your operation can work though, that is something you need to check ...