Conference article

Modeling and Validation of a Multiple Evaporator Refrigeration Cycle for Electric Vehicles

Andreas Varchmin
Technische Universität Braunschweig, Institut für Thermodynamik, Germany

Manuel Gräber
TLK-Thermo GmbH, Germany

Jürgen Köhler
Technische Universität Braunschweig, Institut für Thermodynamik, Germany

Download articlehttp://dx.doi.org/10.3384/ecp15118281

Published in: Proceedings of the 11th International Modelica Conference, Versailles, France, September 21-23, 2015

Linköping Electronic Conference Proceedings 118:30, s. 281-289

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Published: 2015-09-18

ISBN: 978-91-7685-955-1

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

Abstract

Multiple evaporator vapor compression cycles become relevant for thermal systems in electric vehicles since batteries and other electric components demand cooling for a secure operation. In difference to most other applications with parallel evaporators cooling demands and temperature levels vary between the different secondary fluids. This leads to a more complex system behavior that needs to be described for optimality and control analysis. In this paper a dynamic model for an automotive air conditioning cycle with an additional evaporator for battery cooling is developed and validated. A battery model library for calculating temperatures and waste heat flows of battery cells and modules is presented. Multi-evaporator effects and their consequences are discussed. Reasonable actuating and control variables are chosen and an analysis regarding possible control schemes is given.

Keywords

Multi-Evaporator Cycle; Parallel Evaporators; Vapor Compression Cycle; Electric Vehicle; Relative Gain Array

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