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Condensation of CFC-12 and its substitute HFC-134a inside a horizontal smooth tube.

[In Japanese. / En japonais.]

Author(s) : KOYAMA S., GAO L., FUJII T.

Type of article: Article

Summary

Condensation heat transfer coefficient and pressure drop of R12 and its substitute R134a were measured inside a horizontal smooth tube with an inner diameter of 7.9 mm. The mass velocity ranged from 113 to 340 kg/m2.s, and the saturation temperature ranged from 40 to 60 deg C. The local heat transfer coefficient of R134a is 10 to 25% higher than that of R12 at the same values of saturation temperature, mass velocity, heat flux and vapour quality.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1994-0133
  • Languages: Japanese
  • Source: Trans. JAR - vol. 10 - n. 1
  • Publication date: 1993
  • Document available for consultation in the library of the IIR headquarters only.

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