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REFRIGERATION LOADS IN A FREEZER DUE TO HOT GAS DEFROST AND THEIR ASSOCIATED COSTS.

Author(s) : COLE R. A.

Summary

THE BUILT-UP OF FROST ON UNIT COOLER SURFACES, IF NOT PERIODICALLY CLEARED, WILL EVENTUALLY CAUSE IMPAIRMENT OF THE UNIT'S PERFORMANCE, EVENTUALLY RENDERING IT USELESS. THUS IT IS NECESSARY, IN SPACES BELOW FREEZING, TO PROVIDE AN EXTERNAL SUPPLY OF HEAT TO WARM THE UNIT SUFFICIENTLY TO MELT THE FROST AND REMOVE IT. IN LARGE CENTRAL-PLANT-TYPE SYSTEMS THE MOST COMMON METHOD EMPLOYED FOR SUPPLYING HEAT IS REFERRED TO AS HOT GAS DEFROST. THE PAPER LOOKS AT THE HEAT AND MASS TRANSFER AND FLUID FLOW MECHANISMS INVOLVED IN THE HOT GAS DEFROST PROCESS IN LARGE COMMERCIAL FREEZERS. IT SUGGESTS SOME MATHEMATICAL MODELS FOR ANALYSIS OF THE PHENOMENON AND OFFERS NOMOGRAPHS.

Details

  • Original title: REFRIGERATION LOADS IN A FREEZER DUE TO HOT GAS DEFROST AND THEIR ASSOCIATED COSTS.
  • Record ID : 1991-0297
  • Languages: English
  • Publication date: 1989
  • Source: Source: ASHRAE Trans.
    vol. 95; n. 2; 1149-1154; 9 fig.; 1 tabl.; 8 ref.
  • Document available for consultation in the library of the IIR headquarters only.

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