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USING STRUCTURED SURFACE TO ENHANCE HEAT TRANSFER IN FALLING FILM FLOW.

Author(s) : FAGERHOLM N. E.

Summary

HEAT TRANSFER WAS STUDIED EXPERIMENTALLY ON THE EVAPORATION OF A FALLING FILM (R114)AND THE IMPROVEMENT OF THIS ON THE WALLS OF TUBES WITH A POROUS SURFACE. SMOOTH AND SAND-BLASTED TUBES WERE ALSO TESTED. A DISTORSION OF THE FILM AND A DROPLET ENTRAINMENT WERE OBSERVED, INCREASING WITH THE INCREASE IN THE THERMAL FLOW. ON TUBES WITH A POROUS SURFACE, THE MAIN FORM OF HEAT TRANSFER WAS NUCLEATE BOILING FOR ALL DENSITIES OF THERMAL FLOW. THE PERFORMANCE OF THESE TUBES WAS ABOUT TEN TIMES HIGHER THAN THAT OF SMOOTH TUBES.

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Pages: 1985-3

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Details

  • Original title: USING STRUCTURED SURFACE TO ENHANCE HEAT TRANSFER IN FALLING FILM FLOW.
  • Record ID : 1987-0884
  • Languages: English
  • Source: Systems and components for large heat pumps.
  • Publication date: 1985/06/19
  • Document available for consultation in the library of the IIR headquarters only.

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