Thermo Special Interest Group met on September 27, 2022 from 10 am till noon Central European Summer Time.



AmsterCHEM (represented by Jasper van BATEN), KBC Advanced Technologies (represented by Richard SZCZEPANSKI), University of Cape Town (represented by Klaus MÖLLER),  Michel PONS (Consultant as Chief Technology Officer).


Presentations and discussions at the CAPE-OPEN 2022 Annual Meeting have highlighted the need for the Thermo SIG to invest time and resources in the specification of tests pertaining to the implementation of Thermodynamic and Physical Properties interfaces. KBC Advanced Technologies has expressed its interest in joining this effort.

During the conference call today, means to conduct this development have been discussed and experimented. One “Best Practice” test currently implemented in CO-LaN Test Suite v0.2.0 has been validated within the Test Category “Universal_Constants_Best_Practices“. It is the test ICapeThermoUniversalConstants_Existence. Implementation of ICapeThermoUniversalConstants interface by a Property Package is non-mandatory but is recommended (“It is recommended that it is implemented by Property Package components and Material Objects being used by CAPE-OPEN Unit Operations“). This “Best Practice” test succeeds if ICapeThermoUniversalConstants is implemented on the software component under test.

Next, another defined “Best Practice” test (KnownCapeThermoUniversalConstants), in the same Test Category, was discussed and its enhancement initiated.

This “Best Practice” test, as initially outlined by CO-LaN CTO, within the process described by Malcolm WOODMAN at the CAPE-OPEN 2022 Annual Meeting, checks if any of the Universal Constant identifiers returned in the list of supported Universal Constants are from the list of identifiers defined in the CAPE-OPEN standard, and succeeds if at least one such identifier is returned.

After discussion, it seems that the support of “molarGasConstant” as a Universal Constant is a best practice if the critical compressibility factor is supported as a constant property for Compounds supported by the Property Package. Also the support of the ideal Gas State Reference Pressure (“idealGasStateReferencePressure“) as a Universal Constant is a best practice if ideal gas entropy is supported as a temperature-dependent property.

Till next meeting, scheduled on October 4, 2022, Thermo SIG will review what is the relationship between Universal Constants and other properties supported by a Property Package so that this”Best Practice” test can be better defined.

A few comments, still not addressed so far, have been addressed in the current version of the Manager interface specification. An inconsistency between text and a Use Case was resolved regarding the Category Ids carried by a Manager.

Thermo SIG defined then a set of diagrams to be included in the specification in order to help the developer figure out how the Manager object falls within the entire CAPE-OPEN scope. The defined set of diagrams needs further work in Modelio before being introduced into the Manager Common Interface specification.

Next meeting is scheduled for October 4, 2022.


Picture of Sergej BLAGOV, BASF (2018)Picture of Jasper van BATEN (AmsterCHEM)Any CO-LaN Member interested in the Thermo SIG activities is welcome to join this Special Interest Group. Contact the co-leaders of the SIG for further information: Sergej BLAGOV at BASF () and Jasper van BATEN at AmsterCHEM (). The Thermo SIG is looking for additional parties, well versed into any aspect of thermodynamics applied to process simulation and willing to contribute to the maintenance and development of CAPE-OPEN interface specifications related to thermodynamical aspects.