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Etude numérique et comparaison expérimentale : analyse comparative du cycle sous-critique au R134a par rapport au cycle transcritique au CO2.

Comparative analysis of R134a subcritical cycle vs CO2 transcritical cycle: numerical study and experimental comparison.

Auteurs : RIGOLA J., RAUSH G., ABLANQUE N., et al.

Résumé

The article is a numerical and experimental comparative study of the whole refrigerating cycle in general, and the hermetic reciprocating compressors in particular, between an R134a conventional refrigerating cycle and a carbon dioxide transcritical refrigerating system. The comparative case presented has been specially designed for small cooling capacities and an evaporation temperature around 0 °C. A detailed numerical simulation model for hermetic reciprocating compressors performance has been used to numerically compare both a conventional R134a hermetic compressor and a first carbon dioxide compressor prototype. In order to validate this laboratory setup, a detailed numerical simulation of the thermal and fluid-dynamic behaviour of a single-stage vapour compression refrigerating unit has been developed and used. The numerical and experimental results obtained show a good agreement, while the comparative global values show very similar efficiencies under the same working conditions.

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Pages : 2004-2

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Détails

  • Titre original : Comparative analysis of R134a subcritical cycle vs CO2 transcritical cycle: numerical study and experimental comparison.
  • Identifiant de la fiche : 2005-1796
  • Langues : Anglais
  • Source : Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
  • Date d'édition : 01/08/2004

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