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Mesure du coefficient de transfert de chaleur du frigorigène dans un évaporateur sous des conditions réelles de fonctionnement.

Measurement of the heat transfer rate of refrigerant evaporator under real operating conditions.

Auteurs : PARK J., LEE J., KIM M. H., et al.

Résumé

The heat transfer rates of refrigerant evaporators were measured and compared in order to obtain better performance in a given condition which is simulated using real operating conditions of commercial refrigerators in a temperature-controlled chamber. To achieve the operating conditions of very low temperature like -30°C, the experimental facility was newly made up, and refrigerant R-134a was used as the working fluid instead of a single-phase working fluid. Thus, the thermal resistance and temperature profile inside the evaporator would be similar with the actual evaporator in a refrigerator. The working fluid R-134a was circulated by a pump, not a compressor. It improved the reproducibility of the experiment by preventing the effect of compressor oil. The uncertainty of the measurement was within 3%. It was shown that the several types of evaporators are able to be selected, and have better heat transfer rates in spite of relatively low heat transfer areas.

Détails

  • Titre original : Measurement of the heat transfer rate of refrigerant evaporator under real operating conditions.
  • Identifiant de la fiche : 2007-0077
  • Langues : Anglais
  • Source : ACRA-2006. Proceedings of the 3rd Asian conference on refrigeration and air conditioning.
  • Date d'édition : 21/05/2006

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