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Effets de l'écoulement à pulsation sur l'évaporation du frigorigène dans un échangeur de chaleur à plaques.

Effects of pulsating flow on the evaporation of the refrigerant in a plate heat exchanger.

Auteurs : JUNG I. K., KANG B. H., KIM S.

Résumé

The evaporation heat transfer characteristics by pulsating flow in a plate heat exchanger were investigated experimentally in the study. R-134a is evaporated by receiving heat from the hot water in the plate heat exchanger. The pulsating frequency in refrigerant side of the plate heat exchanger is varied in the range of 5-25 Hz. The operating pressure or R-134a and mass flux of hot water were also varied. The experimental results indicated that the evaporation heat transfer coefficient of pulsating flow is improved up to 6.3% compared with that of the steady flow. It was also found that the evaporation heat transfer enhancement ratio was decreased with an increase in mass flux of hot water. The evaporation heat transfer enhancement is little influenced by the operating pressure of R-134a.

Détails

  • Titre original : Effects of pulsating flow on the evaporation of the refrigerant in a plate heat exchanger.
  • Identifiant de la fiche : 2007-0111
  • 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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