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INFLUENCE OF OIL ON REFRIGERANT EVAPORATOR PERFORMANCE. 1. LOCAL HEAT TRANSFER COEFFICIENTS.

[In Japanese. / En japonais.]

Author(s) : KIM J.

Type of article: Article

Summary

AN EXPERIMENTAL INVESTIGATION WAS CARRIED OUT ON AN ELECTRICAL LY HEATED HORIZONTAL TUBE TO MEASURE LOCAL HEAT TRANSFER COEFFICIENTS FOR VARIOUS FLOW RATES AND HEAT FLUXES DURING FORCED CONVECTION BOILING OF PURE R12 AND REFRIGERANT-OIL MIXTURES (0-11% OIL CONCENTRATION BY WEIGHT) AND THE RESULTS WE RE COMPARED WITH OIL FREE PERFORMANCE. LOCAL HEAT TRANSFER COEFFICIENTS INCREASED IN THE REGION OF LOW VAPOUR QUALITY BY THE ADDITION OF OIL AND GRADUALLY DECREASED AS THE VAPOUR QUALITY BECAME HIGHER. AVERAGE HEAT TRANSFER COEFFICIENT REACHED A MAXIMUM AT ABOUT 4% OIL CONCENTRATION AND THIS TREND AGREED WELL WITH THE RESULTS OF GREEN AND FURSE. NEW CORRELATION MODIFIED BY OIL CONCENTRATION FACTOR WAS DEVELOPED.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1989-0552
  • Languages: Japanese
  • Source: Trans. JAR - vol. 5 - n. 1
  • Publication date: 1988
  • Document available for consultation in the library of the IIR headquarters only.

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