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Prévision de la performance d'un cycle transcritique au CO2 pour le conditionnement d'air.

Performance prediction of a R744 transcritical cycle for air conditioning.

Numéro : pap. NS07

Auteurs : XUE J., KOYAMA S., KUWAHARA K.

Résumé

From the viewpoint of global environmental protection and energy-saving, the research and development on high-efficiency heat pump systems using environment-friendly refrigerants have become one of the most important issues in the air-conditioning and refrigeration sector. Carbon dioxide (R744) is regarded as a candidate for alternative refrigerant, and R744 heat pump water heater has already been commercialized. However, due to its low critical temperature and high operating pressure, there are still many problems that remain to be solved. One of the agenda is the prediction method for cycle performance when R744 is used as the working fluid of air conditioning equipment. In this study, a steady-state model of the R744 transcritical cycle for air conditioning has been developed to estimate the cooling and heating performance. This cycle consists of a rotary compressor, a fin-tube gas cooler, a fin-tube evaporator, an expansion valve and connecting tubes. The cycle performance has been examined by varying the specifications of heat exchangers and the degree of refrigerant superheat.

Documents disponibles

Format PDF

Pages : 8 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : Performance prediction of a R744 transcritical cycle for air conditioning.
  • Identifiant de la fiche : 30000460
  • Langues : Anglais
  • Source : Measures to address climate change. 2010 International Symposium on Next-generation Air Conditioning and Refrigeration Technology: February 17-19, Tokyo, Japan.
  • Date d'édition : 17/02/2010

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