Conference article

A Medium Model for the Refrigerant Propane for Fast and Accurate Dynamic Simulations

Roozbeh Sangi
Institute for Energy Efficient Buildings and Indoor Climate, E.ON Energy Research Center, RWTH Aachen University, Aachen, Germany

Pooyan Jahangiri
Institute for Energy Efficient Buildings and Indoor Climate, E.ON Energy Research Center, RWTH Aachen University, Aachen, Germany

Freerk Klasing
Institute for Energy Efficient Buildings and Indoor Climate, E.ON Energy Research Center, RWTH Aachen University, Aachen, Germany

Rita Streblow
Institute for Energy Efficient Buildings and Indoor Climate, E.ON Energy Research Center, RWTH Aachen University, Aachen, Germany

Dirk Müller
Institute for Energy Efficient Buildings and Indoor Climate, E.ON Energy Research Center, RWTH Aachen University, Aachen, Germany

Download articlehttp://dx.doi.org/10.3384/ecp140961271

Published in: Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden

Linköping Electronic Conference Proceedings 96:135, p. 1271-1275

Show more +

Published: 2014-03-10

ISBN: 978-91-7519-380-9

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

Abstract

Investigating the use of different fluids and their advantages in new energy systems has increased the need for faster and more robust simulation models. The need to explore the potential of new fluids in different systems requires dynamic simulations for longer periods of time. In this paper; development of a medium model for propane is discussed. Besides being fast and accurate; the propane model should also be stable in different dynamic simulation scenarios.

First; existing libraries are tested and in some cases modified to increase the stability. Since the simulation speeds were not in an acceptable range in the existing models; a new propane model is introduced. The new model is then tested as a refrigerant in a direct exchange heat pump system. A comparison between an existing propane model and the new model shows that much faster simulations; up to 35 times; are possible with the new propane model.

Keywords

Media Library; Propane; Refrigerant; Helmholtz Media

References

[1] C. Heinrich, K. Berthold “A Modelica Library for Simulation of Household Refrigeration Appliances Features and Experiences”. In: Proceedings of the 5th International Modelica Conference, 2006, pp. 677-684.

[2] T. Pfafferott, G. Schmitz “Modeling and Simulation of Refrigeration Systems with the Natural Refrigerant CO2” In: Proceesings of the International Refrigeration and Air Conditioning Conference, 2002.

[3] T. Pfafferott, G. Schmitz “ Implementation of a Modelica Library for Simulation of Refrigeration Systems” In: Proceedings of the 3rd International Modelica Conference, 2003, pp. 197-206.

[4] I. Bell, S. Quoilin, J. Wronski, V. Lemort “CoolProp: An Open-Source Reference-Quality Thermophysical Property Library” In: 2nd ASME ORC International eminar, 2013.

[5] M. Thorade, A. Saadat “Partial Derivatives of Thermodynamic State Properties for Dynamic Simulation”. In: Environmental Earth Sciences (online first), 2012. DOI:
10.1007/s12665-013-2394-z.

[6] M. Thorade, A. Saadat “HelmholtzMedia – A Fluid Properties Library”. In: Proceedings of the 9th International Modelica Conference, 2012, pp. 63-69. DOI: 10.3384/ecp1207663

[7] E. W. Lemmon, M. O. McLinden, W. Wagner “Thermodynamic Properties of Propane. III. A Reference Equation of State for Temperature from Melting Line to 650 K and Pressures up tp 1000 MPa”. In: Journal of Chemical Engineering Data 54, 2009, pp. 3141-3180.

[8] K. Lucas, “Thermodynamik, Die Grundgesetze der Energie- und Stoffumwandlungen”, Sprinter Verlag Berlin, 7. Edition, 2008. ISBN-13: 9783540686453

Citations in Crossref