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Prediction of in-tube condensation heat transfer characteristics of binary refrigerant mixtures.

Author(s) : JIN D. X., KWON J. T., KIM M. H.

Type of article: Article, IJR article

Summary

This study presents a prediction model for the condensation heat transfer characteristics of binary zeotropic refrigerant mixtures inside horizontal smooth tubes. In this model, both the vapour-side and liquid-side mass transfers were considered, and the high flux mass transfer correction factor was used to evaluate mass transfer coefficients. The model was applied to the binary zeotropic refrigerant mixture R134a/R123, which has a large temperature glide. Calculations showed that the heat transfer degradation of R134a/R123 due to gradients in the mass fraction and temperature was considerable, and depended on the mass fraction of the more volatile component and the vapour mass quality of the refrigerant mixture. By comparison with experimental data, incorporating the present finite mass transfer model for the liquid film side into the calculation algorithm was shown to predict reasonably well the condensation heat transfer coefficients of binary refrigerant mixtures with a mean deviation of about 10.3%. In the present calculations, however, it was also found that the high flux mass transfer correction factor had only a slight effect on the condensation heat transfer.

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Pages: 593-600

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Details

  • Original title: Prediction of in-tube condensation heat transfer characteristics of binary refrigerant mixtures.
  • Record ID : 2003-2171
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 26 - n. 5
  • Publication date: 2003/08

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