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THE COST OF FROST.

Author(s) : COLEY M. B.

Type of article: Article

Summary

THE AUTHOR COMPARES TWO AIR COOLING SYSTEMS FOR A HOG CARCASS CHILLING ROOM. ONE SYSTEM USES DRY COILS WITH HOT GAS DEFROSTING, THE OTHER USES COILS SPRAYED WITH A GLYCOL SOLUTION ON WHICH NO FROST FORMS. THE CONCLUSION IS THAT THE FIRST REQUIRES ALMOST THREE TIMES THE INSTALLED COMPRESSOR CAPACITY AND THAT THE SECOND REQUIRES AND USES APPROXIMATELYTWICE THE ENERGY CONSUMPTION FOR A TWENTY HOUR CHILLING PERIOD. THE DIFFERENCES ARE DUE MAINLY TO THE ASSUMPTION THAT MUCH OF THE DEFROSTED ICE RE-ENTERS THE ROOM AIR AS WATER VAPOUR, COUPLED WITH FACTORS LIKE THE NECESSARY LOWERING IN EVAPORATION TEMPERATURE DUE TO FROST ACCUMULATION ON THE COIL SURFACE. A WORKED EXAMPLE ILLUSTRATES THE ARGUMENT. D.W.H.

Details

  • Original title: THE COST OF FROST.
  • Record ID : 1984-0971
  • Languages: English
  • Source: ASHRAE Journal - vol. 25 - n. 9
  • Publication date: 1983/09
  • Document available for consultation in the library of the IIR headquarters only.

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