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Release v8.47: Improved Matthias-Coppman parameters |
20 April 2025 |
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On Easter we released a new version with improved support for the Matthias-Coppman (MC) parameters, particularly for Peng-Robinson.
The PCD manager can now compare the vapor pressure temperature correlations with the predictions of the equations of state.
It can also fit the MC parameters for the SRK and PR and store the MC parameters for the PR-eos in a dedicated text file.
This resulted in much improved performance for the UMR-PR.
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Release v8.45: Improved Liquid-Liquid Equilibria Capabilities |
5 January 2025 |
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We improved the stability check of the Liquid-Liquid (LL) flash calculations and added support for LLE Cape-Open Property Packages such that Liquid-Liquid eXtraction columns (LLX) can acquire their properties via cape-open calls.
The LLX columns now perform a density calculation on all the feeds to assign them as either a light or a heavy phases.
Other improvements include the drawing of column internals in the panel of the operation, as well as icons on flowsheets for didactic purposes.
We increased the number of points that can be computed in the parametric study option and we added new compounds in our libraries with Pure Component Data (PCD).
Minor fixes include improvements for the phase diagrams and for the UMR methods as well as updated PCD data.
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Release v8.44: Maintenance update |
3 March 2024 |
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This version of ChemSep has improvements for the handling of more than six different functional groups per molecule (for methods like UNIFAC).
Total Reflux columns can now be dropped onto COCO flowsheets. The Interface can read X-files for a quick setup of a new simulation.
Plots can be saved as SVG files. PCDman can read Stenutz information from the web and can load/save component list files (CLF) and various
compressed formatted files (e.g. xlsx files). Finally, various Tall oil compounds, Pyridines, Anisoles, Chloro-compounds to our PCD libraries.
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Release v8.41: Easy and Fast Dividing Wall Column Setup |
23 July 2023 |
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ChemSep LITE 8v41 extends the number of predefined divided wall columns (DWCs) and we added a new, simple pressure specification for that makes setting up a DWC simulation a breeze compared to other commercial tools. We also improved the Matthias-Copeman (MC) parameters for all compounds in our libraries. This will significantly enhance the performance of the PPR78, PSRK, and UMR-SRK Equations of State.
For the UMR-PR all new parameters were determined, which now reside in its own library file mc-pr.lib.
Editing PSRK and NIST UNIFAC groups is now supported, as well as entering up to 12 groups per molecule.
Furthermore, our binary phase diagrams for Vapor-Liquid Equilibrium are improved and now feature an export to the Veusz drawing tool for producing diagrams ready for publishing.
Finally, missing alkanal compounds were added to our PCD libraries.
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Copyright © Thu May 22 22:00:16 2025 ChemSep
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