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Méthode permettant la prévision des caractéristiques de transfert de chaleur et de masse des mélanges de frigorigènes lors de la condensation dans un tube lisse horizontal.

[In Japanese. / En japonais.]

Auteurs : KOYAMA S., LEE S. M.

Type d'article : Article

Résumé

The paper deals with a prediction method for the condensation of a multi-component refrigerant mixture inside a horizontal smooth tube. The present method is obtained by extending the prediction method for a binary zeotropic refrigerant mixture to a multi-component one. The governing equations for the local heat and mass transfer characteristics are derived based on the some reliable assumptions such as the phase equilibrium that is established only at the vapour-liquid interface. In order to demonstrate the present method, the local heat and mass transfer characteristics of ternary zeotropic refrigerant mixtures composed of HFC-32/HFC-125/HFC-134a, including R407C, are evaluated for a counterflow double-tube condenser cooled by water. Then, the local values of vapour quality, thermodynamic states at bulk vapour, vapour-liquid interface and bulk liquid, heat flux and condensation mass flux are obtained. The effects of the composition of HFC-32/HFC-125/HFC-134a on the total pressure drop and the heat transfer characteristics are also examined.

Détails

  • Titre original : [In Japanese. / En japonais.]
  • Identifiant de la fiche : 2001-2677
  • Langues : Japonais
  • Source : Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 17 - n. 4
  • Date d'édition : 2000
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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