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Condensation of R407C in a horizontal microfin tube.

Author(s) : HONDA H., WIJAYANTA A. T., TAKATA N.

Type of article: Article, IJR article

Summary

This article describes experimental results that show the effects of mass velocity and condensation temperature difference on the local heat transfer characteristics during condensation of R407C in a horizontal microfin tube. The experiments were performed at the saturation temperature of 40 °C, the refrigerant mass velocity of 50, 100, 200 and 300 kg/m2.s, and the condensation temperature difference of 1.5, 2.5 and 4.5 K. A superficial heat transfer coefficient for the vapour phase was obtained by subtracting the heat transfer resistance of condensate film estimated by using a previously developed theoretical model of film condensation of pure vapour from the overall heat transfer resistance. On the basis of the analogy between heat and mass transfer, an empirical equation for the superficial vapour phase heat transfer coefficient was developed. The heat transfer coefficient predicted by the combination of the previously developed theoretical model of film condensation of pure vapour and the empirical equation of the superficial vapour phase heat transfer coefficient agreed with the measured values with the r.m.s. error of 9.2%.

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Pages: 203-211

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Details

  • Original title: Condensation of R407C in a horizontal microfin tube.
  • Record ID : 2005-1634
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 2
  • Publication date: 2005/03

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