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EVAPORATION AND CONDENSATION HEAT TRANSFER COEFFICIENTS AND PRESSURE DROPS OF A TERNARY BLEND OF HCFC124/HCFC22/HCFC152A AND OIL MIXTURES.

Author(s) : ECKELS S. J., PATE M. B., BIVENS D. B.

Summary

EXPERIMENTAL HEAT TRANSFER COEFFICIENT AND PRESSURE DROPS ARE REPORTED FOR A TERNARY REFRIGERANT BLEND COMPOSED OF 40% R124, 36% R22, AND 24% R152A WITH VARIOUS CONCENTRATIONS OF A 150 SUS ALKYLBENZENE OIL. THE BLEND IS A VIABLE SUBSTITUTE FOR R12 IN VAPOR COMPRESSION REFRIGERATION CYCLES, ESPECIALLY SINCE ITS OZONE DEPLETION POTENTIAL IS ONLY A SMALL FRACTION OF THE R12 VALUE. COMPARED TO PURE REFRIGERANT VALUES, THE EVAPORATION HEAT TRANSFER COEFFICIENTS SHOWED INCREASES OF 10 TO 15% FOR OIL CONCENTRATIONS LESS THAN 2.5%. HOWEVER, THE COEFFICIENTS DECREASED 20 TO 30% AT THE HIGHEST OIL CONCENTRATION OF 5.5% THE ADDITION OF OIL CAUSED THE EVAPORATION PRESSURE DROPS TO INCREASE OVER THE WHOLE RANGE OF OIL CONCENTRATIONS, WITH A 20 TO 30% INCREASE AT 5.4% OIL. THE CONDENSATION HEAT TRANSFER COEFFICIENTS DECREASED AS OIL WAS ADDED TO THE SYSTEM WITH A 10 TO 15% DROP IN HEAT TRANSFER COEFFICIENTS AT 5.5% OIL. IN GENERAL, THE DDITION OF OIL.

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Pages: 464-468

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Details

  • Original title: EVAPORATION AND CONDENSATION HEAT TRANSFER COEFFICIENTS AND PRESSURE DROPS OF A TERNARY BLEND OF HCFC124/HCFC22/HCFC152A AND OIL MIXTURES.
  • Record ID : 1992-2112
  • Languages: English
  • Source: New challenges in refrigeration. Proceedings of the XVIIIth International Congress of Refrigeration, August 10-17, 1991, Montreal, Quebec, Canada.
  • Publication date: 1991/08/10
  • Document available for consultation in the library of the IIR headquarters only.

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