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Étude de systèmes de conditionnement d’air et pompe à chaleur au R744 équipés d’éjecteur pour les véhicules électriques.

Investigation of R744 AC and heat pump systems for electric vehicles with ejectors.

Numéro : 0656

Auteurs : NIROOMAND R., PIESCH N., HAFNER A., BANASIAK K., AYAD F.

Résumé

R744 is considered a highly promising alternative to PFAS-based refrigerants in electric vehicle air conditioning/heat pump systems. However, the throttling loss in an AC/HP cycle using R744 is relatively higher than in a cycle using PFAS producing refrigerants. It is possible to address this challenge by using a two-phase ejector that uses the expansion work of the high-pressure refrigerant to boost and compress the low-pressure refrigerant. In this article, a thermodynamic analysis is carried out to investigate the advantages of integrating a two-phase ejector into the electric vehicle AC/HP cycle. In this study, three cabin cooling modes, two cabin heating modes, and one battery cooling mode are investigated. The results show that the ejector provides up to 10.5 bar pressure lift and 26% compressor power saving potential. Furthermore, the required compressor displacement is reduced by about 22%. With the same compressor for baseline and ejector systems, the ejector system provides 24% more cooling capacity.

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Format PDF

Pages : 9 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Investigation of R744 AC and heat pump systems for electric vehicles with ejectors.
  • Identifiant de la fiche : 30033402
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 11th IIR Conference on Compressors and Refrigerants.
  • Date d'édition : 09/2024
  • DOI : http://dx.doi.org/10.18462/iir.compr.2024.0656

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