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Condensing heat transfer characteristics of R134a and R12 inside a smooth tube in low mass velocity range.

[In Japanese. / En japonais.]

Author(s) : ITOH M., KOBAYASHI C., HARA T., SHIBAYAMA M., KUNUGI Y.

Type of article: Article

Summary

The mass velocity of refrigerant ranged from 60 to 170 kg/m2.s and the saturation temperature was about 45 deg C. Condensing heat transfer coefficients in low mass velocity range (below 100 kg/m2.s) were ranked as follows: horizontal higher than vertical upward higher than vertical downward tubes. Condensing heat transfer coefficient of R134a was 15-20% lower than that of R12 with both horizontal and vertical tubes.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1996-0097
  • Languages: Japanese
  • Source: Trans. JAR - vol. 11 - n. 3
  • Publication date: 1994
  • Document available for consultation in the library of the IIR headquarters only.

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