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AN EXPERIMENTAL COMPARISON OF EVAPORATION AND CONDENSATION HEAT TRANSFER COEFFICIENTS FOR HFC-134A AND CFC-12.

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

Type of article: Article, IJR article

Summary

EXPERIMENTAL HEAT TRANSFER COEFFICIENTS ARE REPORTED FOR R134A AND R12 DURING IN-TUBE SINGLE-PHASE FLOW, EVAPORATION AND CONDENSATION. EVAPORATION TESTS WERE PERFORMED FOR A REFRIGERANT TEMPERATURE RANGE OF 278-288 K (5-15 DEG C) WITH INLET AND EXIT QUALITIES OF 10 AND 90%, RESPECTIVELY. FOR CONDENSATION TESTS, THE REFRIGERANT TEMPERATURE RANGED FROM 303 TO 323 K (30 TO 50 DEG C), WITH INLET AND EXIT QUALITIES OF 90 AND 10%, RESPECTIVELY. R134A SHOWED A 35-45% INCREASE OVER R12 FOR EVAPORATION AND A 25-35% INCREASE OVER R12 FOR CONDENSATION.

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Pages: 70-77

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Details

  • Original title: AN EXPERIMENTAL COMPARISON OF EVAPORATION AND CONDENSATION HEAT TRANSFER COEFFICIENTS FOR HFC-134A AND CFC-12.
  • Record ID : 1991-1478
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 14 - n. 2
  • Publication date: 1991/03

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