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HEAT TRANSFER IN BUILDING THERMAL INSULATION: THE THICKNESS EFFECT.

Author(s) : FINE H. A.

Summary

HEAT TRANSFER WITHIN INSULATION IS EXAMINATED, USING THE RESULTS OF A NUMERICAL SOLUTION TO THE COUPLED CONDUCTION AND RADIATION HEAT TRANSFER PROBLEM ASSOCIATED WITH AN ABSORBING AND EMITTING SINGLE-PHASE GRAY MEDIUM CONTAINED BETWEEN INFINITE PARALLEL BLACK ISOTHERMAL PLATES. A THREE-REGION APPROXIMATE SOLUTION TO THE SAME PROBLEM IS ALSO DEVELOPED AND SHOWN TO AGREE TO WITHIN ABOUT 0.5% TO THE NUMERICAL SOLUTION FOR MOST CASES. THIS APPROXIMATE SOLUTION TO THE COUPLED PROBLEM AND THE EXACT SOLUTION TO THE UNCOUPLED PROBLEM ARE USED TO ESTABLISH THE EFFECT OF TEST CONDITIONS ON THE MEASURED APPARENT THERMAL PROPERTIES OF A SPECIMEN. A MEANS TO EXTRAPOLATE THERMAL RESISTANCE DATA FROM THIN TO THICK SPECIMENS IS SUGGESTED.

Details

  • Original title: HEAT TRANSFER IN BUILDING THERMAL INSULATION: THE THICKNESS EFFECT.
  • Record ID : 1984-0896
  • Languages: English
  • Publication date: 1981
  • Source: Source: ASHRAE Trans.
    vol. 87; n. 2; 89-107; 4 fig.; 8 tabl.; 16 ref.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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