iea-annex60/modelica-annex60 — pull request #47 by mwetter (2014-03-26 05:11:01+00:00)
Title: Issue42 expansion vessel

This branch contains the new expansion vessel that is needed for grundA and grundC.
It sets the port pressure to a constant, and adds a mass and energy balance for the expansion vessel, as discussed during the Lund meeting.
The model has been tested in the Buildings library and leads to almost identical results as the previous expansion vessel of the Buildings library, which will be replaced by this simpler version.