The UNIT SIG held a conference call from 4:30 pm till 5:30 pm Central European Time.


Modifications to revised Petroleum Fractions interface specification.


AVEVA (represented by Krishna Murthy PENUKONDA), Bryan Research & Engineering (represented by Michael HLAVINKA), AmsterCHEM (represented by Jasper van BATEN), Cesar PERNALETE (University of Ghent), Michel PONS (as CTO from CO-LaN, contractor), Shell (represented by Richard BAUR), ChemSep (represented by Harry KOOIJMAN).


UNIT Special Interest Group reviewed modifications proposed by CTO to the revised Petroleum Fractions interface specification:

The above modifications were approved as part of version 5.46:

  • version 1.0 of the Thermodynamic and Physical Properties interface specification has been deprecated by CO-LaN and still making reference to it would defeat the purpose of the deprecation,
  • choosing a Boolean type for the Compound Constant designating a Compound as a Petroleum Fraction is considered as a better solution than relying on a Compound Constant expressed as a string (it leaves the possibility to define new Compound Constants if the need arises for other types of Compounds to be identified, and it is easier to deal with the situation where real Compounds do not carry this Compound Constant),
  • UNIT SIG recognizes the possibility for a Refinery Unit Operation to have Ports connected for example to a stream carrying only steam, where support for Petroleum Fractions is not necessary,
  • the definition of what is a Refinery Unit Operation may have been dropped from the document at some point in time, and needs to be reinstated.

Categorizing a Refinery Unit Operation differently from a CAPE-OPEN Unit Operation within the Windows registry was discussed as an additional modification. Use Cases supporting the need for a separate category of CAPE-OPEN Component will be developed to help decide if such a category needs really to be defined, so that a decision on this proposal can be made before or at the next meeting of the UNIT Special Interest Group.


Picture of Krishna Murthy PENUKONDA (AVEVA), 2018.As Member of CO-LaN, should you want to join the UNIT Special Interest Group, please contact its leader, Krishna Murthy PENUKONDA (representative of AVEVA). The charter of the UNIT Special Interest Group is to develop, maintain and promote unit operation interface specifications. Since the merger of the Refinery Reactors Special Interest Group in the UNIT Special Interest Group, activities have progressively focused on the revision of the Petroleum Fraction interface specification which is closely linked to the UNIT interface specification.