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A COMPARISON OF R134A AND R12 IN-TUBE HEAT TRANSFER COEFFICIENTS BASED ON EXISTING CORRELATIONS.

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

Summary

HEAT TRANSFER COEFFICIENTS FOR EVAPORATION AND CONDENSATION OF R134A AND R12 ARE COMPARED FOR A RANGE OF CONDITIONS TYPICALLY FOUND IN HEAT EXCHANGERS USED FOR REFRIGERATION AND AIR-CONDITIONING APPLICATIONS. THE CORRELATIONS HAVE BEEN PREVIOUSLY ECS IE.N RC AO5%. EVAPORATION CORRELATIONS PREDICT INCREASES FROM 28 TO 40%, DEPENDING ON THE REFRIGERANT TEMPERATURE, TUBE DIAMETER, AND TUBE LENGTH. CONDENSATION CORRELATIONS PREDICT INCREASES FROM 33 TO 38%, DEPENDING ON THE REFRIGERANT TEMPERATURE.

Details

  • Original title: A COMPARISON OF R134A AND R12 IN-TUBE HEAT TRANSFER COEFFICIENTS BASED ON EXISTING CORRELATIONS.
  • Record ID : 1991-0596
  • Languages: English
  • Publication date: 1990
  • Source: Source: ASHRAE Trans.
    vol. 96; n. 1; 256-265; 16 fig.; 2 tabl.; 13 ref.; 3 append.
  • Document available for consultation in the library of the IIR headquarters only.

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