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Document IIF

Etude d'un système réversible de refroidissement et de chauffage pour véhicules électriques utilisant le CO2 comme fluide actif sous des conditions de givrage.

Investigation of a reversible cooling and heating system for electric vehicles using CO2 as working fluid under frosting conditions.

Numéro : pap. n. 228

Auteurs : STEINER A., RIEBERER R.

Résumé

For electric vehicles the heat demand during the cold season is crucial since only little waste heat is available for heating the passenger compartment. Resistance heating with PTC elements reduces significantly the cruising range of electric vehicles. The use of the A/C system as a heat pump is a much more energy efficient solution. However, in heat pump mode the frost formation on the exterior heat exchanger reduces the performance and efficiency of the system. A reversible cooling and heating system for an electric city car using CO2 as working fluid was measured under frosting conditions. This paper discusses the effects on the system behavior at the chosen operating conditions. In order to simulate the system behavior, a transient simulation model in Modelica, which can handle frost growth on a discretised heat exchanger, was adapted and compared to experimental data.

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Pages : 8 p.

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Détails

  • Titre original : Investigation of a reversible cooling and heating system for electric vehicles using CO2 as working fluid under frosting conditions.
  • Identifiant de la fiche : 30004696
  • Langues : Anglais
  • Source : 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
  • Date d'édition : 25/06/2012

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