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Ebullition en écoulement de R-22, R-134a et de CO2 dans un évaporateur horizontal avec des microcanaux. 1. Chute de pression d'écoulement diphasique.

Flow boiling of R-22, R-134a and CO2 in horizontal evaporator with minichannels. 1. Two-phase flow pressure drop.

Auteurs : PAMITRAN A. S., CHOI K. I., OH J. T., et al.

Résumé

Two-phase flow pressure drop during evaporation process of R-22, R-134a and CO2 were studied in horizontal minichannels of 1.5 and 3.0 mm inside diameters with heated length of 2 m. Experiments were performed at mass flux ranges from 200 to 600 kg/m2.s, heat flux from 10 to 40 kW/m2, and the inlet saturation temperature of 10°C. The experimental results were drawn on the Wang et al. (1997) and the Wojtan et al. (2005) flow pattern maps; the flow patterns of the study appear earlier compared with both maps. The experimental results are compared with six existing two-phase pressure drop prediction methods.

Détails

  • Titre original : Flow boiling of R-22, R-134a and CO2 in horizontal evaporator with minichannels. 1. Two-phase flow pressure drop.
  • Identifiant de la fiche : 2007-0524
  • 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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