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FILM CONDENSATION OF BINARY REFRIGERANT VAPOURS ON A HORIZONTAL TUBE.

[In Japanese. / En japonais.]

Author(s) : GOTO M., FUJII T.

Type of article: Article

Summary

HEAT TRANSFER COEFFICIENTS HAVE BEEN OBTAINED FOR A BINARY REFRIGERANT (MIXTURES OF R12-R114 AND R11-R114) VAPOUR CONDENSATION ON AN HORIZONTAL TUBE CONTAINED IN A CLOSED VESSEL, THE EXPERIMENTS BEING CARRIED OUT OVER A WIDE RANGE OF MASS FRACTIONS FOR EACH COMPONENT. THE CONDENSATE FOR THE R11-R114 MIXTURE REVEALED A RING-WISE FILM ON THE TUBE WHEN THE MASS FRACTION FOR R114 WAS BETWEEN 0.3 AND 0.8 AT A MODERATE HEAT FLUX DENSITY. WHEN THE HEAT FLUX INCREASED THE FILM TOOK ON A SMOOTH FEATURE, CHANGED TO A TURBULENT RING-WISE FORMATION WHICH GRADUALLY BECAME FAINTER AND RETURNED TO A SMOOTH FORMATION. THE HEAT TRANSFER COEFFICIENTS FOR THE SMOOTH FILM AGREE WELL WITH THOSE PREDICTED BY EQUATIONS, BUT THE COEFFICIENTS FOR THE TURBULENT RING-WISE FILM ARE 50% HIGHER THAN THE PREDICTED VALUES.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1983-1703
  • Languages: Japanese
  • Source: Refrigeration - vol. 57 - n. 660
  • Publication date: 1982
  • Document available for consultation in the library of the IIR headquarters only.

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