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Effect on boiling heat transfer of horizontal smooth microchannel for R410A and R407C.

Author(s) : PAMITRAN A. S., CHOI K. I., OH J. T., et al.

Summary

An experimental study of boiling heat transfer with refrigerants R410A and R407C is presented. The paper focuses on the pressure drop and the boiling heat transfer coefficient of the refrigerants inside a horizontal smooth microchannel. To evaluate the diameter size effect on pressure and heat transfer characteristics, microchannels with inner diameters of 1.5 mm and 3.0 mm and with lengths of 1500 mm and 3000 mm respectively were used. The pressure drop increases with mass flux and heat flux for both inner tube diameters and for both the refrigerants. The pressure drop of R407C is higher than that of R410A, but the heat transfer coefficient of R410A is higher than of R407C in the low quality region. The heat transfer coefficient in the tube with an inner diameter of 1.5 mm is higher than that of 3.0 mm diameter tube at the low quality region. The comparison of heat transfer coefficient between the results of this study and the predictions of some previous correlations shows a high percentage of deviation.

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Details

  • Original title: Effect on boiling heat transfer of horizontal smooth microchannel for R410A and R407C.
  • Record ID : 2004-1040
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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