In-tube evaporation heat transfer or refrigerant mixtures.

Author(s) : DOERR T. M., PATE M. B.


Heat transfer coefficient data was taken during in-tube evaporation of five different refrigerant mixtures. These measurements were performed in a 9.7 mm outside-diameter smooth copper tube at refrigerant temperatures of -2 and 4 deg C. Four different mass fluxes ranging from 125 to 375 kg/s.m2 were tested. On a mass basis, the five different mixtures tested were: R125 (40%)-R32 (60%); R32 (30%)-R125 (10%)-R134a (60%); R134a (90%)-R32 (10%); R125 (44%)-R143a (52%)-R134a (4%), and R134a (75%)-R32 (25%). The evaporative heat transfer coefficients for the mixtures were also compared to data for R22. Results are given.


  • Original title: In-tube evaporation heat transfer or refrigerant mixtures.
  • Record ID : 1995-0834
  • Languages: English
  • Source: Proceedings of the 1994 International Refrigeration Conference at Purdue.
  • Publication date: 1994/07/19
  • Document available for consultation in the library of the IIR headquarters only.


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