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A correlation for forced convective boiling heat transfer of non-azeotropic refrigerant mixture of HFC-22/CFC-114 in a horizontal smooth tube.

Author(s) : TAKAMATSU H., MOMOKI S., FUJII T.

Type of article: Article

Summary

Experiments are carried out on the boiling heat transfer of non-azeotropic refrigerant mixtures of R22/R114 flowing inside a 7.9 mm inner diameter horizontal smooth tube. Using a water-heated, double-tube type evaporator, the local heat transfer coefficients are measured for both counter and parallel flows. An empirical correlation equation is proposed for the data in the annular-flow regime, taking into account the mixture effect in the authors' previous correlation equation for pure refrigerants. The mean deviation between the calculated and measured heat transfer coefficients is 8.9% for the present experimental data and 7.1% for the data obtained by Jung. The equation reveals that the convection heat transfer is dominant due to the suppression of nucleate boiling for the mixtures.

Details

  • Original title: A correlation for forced convective boiling heat transfer of non-azeotropic refrigerant mixture of HFC-22/CFC-114 in a horizontal smooth tube.
  • Record ID : 1994-0153
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 36 - n. 14
  • Publication date: 1993/09

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