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Distribution de R-134a dans le collecteur d'un échangeur de chaleur à écoulement parallèle.

R-134a distribution in a header of a parallel flow heat exchanger.

Auteurs : KIM N. H., LEE E. R.

Résumé

Two-phase flow distribution of R-134a was experimentally investigated in a parallel flow heat exchanger comprised of two horizontal headers and ten vertical channels. For the test range, most of the flow in the header inlet was identified as stratified flow. Both upward and downward configurations were tested. The effect of tube protrusion depth was also investigated. It was observed that, for downward flow, most of the liquid was extracted from the frontal part of the header. For upward flow, on the contrary, significant portion of liquid was forced to rear part of the header. The effect of mass flux, quality and protrusion depth on the liquid distribution was not significant as compared with the air-water counterpart.

Détails

  • Titre original : R-134a distribution in a header of a parallel flow heat exchanger.
  • Identifiant de la fiche : 2007-0583
  • 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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