Conference article

Application of a Real Gas Model by Van-der-Waals for a Hydrogen Tank Filling Process

Maximilian Kormann
Dassault Systèmes, Germany

Imke Lisa Krüger
Dassault Systèmes, Germany

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Published in: Proceedings of the 13th International Modelica Conference, Regensburg, Germany, March 4–6, 2019

Linköping Electronic Conference Proceedings 157:68, p. 6

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Published: 2019-02-01

ISBN: 978-91-7685-122-7

ISSN: 1650-3686 (print), 1650-3740 (online)


Hydrogen fuel tanks operate at high system pressure levels. In these regions effects occur, which cannot be handled by an ideal gas model. One of these is the Joule-Thomson effect. It describes an adiabatic throttling without change in enthalpy, but a change in temperature. The tank filling process can be simplified to a throttling valve, so the effect is of interest. In this investigation the van der Waals equations are implemented in a real gas model for the Hydrogen Library and the Pneumatic Systems Library (PSL) by Dassault Systèmes and the model is applied to a hydrogen tank filling process. Performance and accuracy are compared to the CoolProp fluid properties library, which is imported with the ExternalMedia library.


Hydrogen, Pneumatic Systems Library, Tank Filling Process, Medium Models, Real Gas, van der Waals, Joule-Thomson-Effect, CoolProp


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