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A method enabling prediction of local heat and mass transfer characteristics of multi-component zeotropic refrigerant mixtures condensing in a horizontal smooth tube.

[In Japanese. / En japonais.]

Author(s) : KOYAMA S., LEE S. M.

Type of article: Article

Summary

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.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 2001-2677
  • Languages: Japanese
  • Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 17 - n. 4
  • Publication date: 2000
  • Document available for consultation in the library of the IIR headquarters only.

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