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THE EFFECT OF OIL CONTAMINATION ON THE NUCLEATE POOL-BOILING PERFORMANCE OF R114 FROM A POROUS-COATED SURFACE.

Author(s) : WANNIARACHCHI A. S., MARTO P. J., REILLY J. T.

Summary

THE EXTERNAL, NUCLEATE POOL-BOILING HEAT TRANSFER COEFFICIENT IN R114 WITH UP TO 10% OIL (BY MASS) WAS MEASURED ON A SMOOTH COPPER TUBE AND ON A POROUS-COATED COPPER-NICKEL TUBE. THE POROUS-COATED SURFACE WAS FOUND TO IMPROVE THE HEAT TRANSFER COEFFICIENT OVER THE SMOOTH SURFACE BY A FACTOR OF 7 TO 10 IN OIL-FREE R114. THE PRESENCE OF UP TO 3% OIL CAUSED ABOUT A 35% REDUCTION IN THE HEAT TRANSFER COEFFICIENT OF THE POROUS-COATED SURFACE AT ALL HEAT FLUXES. WITH 6% OR MORE OIL, THE BOILING PERFORMANCE DECLINED DRASTICALLY AT HEAT FLUXES IN EXCESS OF 30 KILOW/M2.

Details

  • Original title: THE EFFECT OF OIL CONTAMINATION ON THE NUCLEATE POOL-BOILING PERFORMANCE OF R114 FROM A POROUS-COATED SURFACE.
  • Record ID : 1987-2132
  • Languages: English
  • Publication date: 1986
  • Source: Source: ASHRAE Trans.
    vol. 92; n. 2B; 525-538; 12 fig.; 15 ref.
  • Document available for consultation in the library of the IIR headquarters only.

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