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FIELD-MEASURED CYCLING, FROSTING AND DEFROSTING LOSSES FOR A HIGH-EFFICIENCY AIR-SOURCE HEAT PUMP.

Author(s) : BAXTER V. D., MOYERS J. C.

Summary

AN AIR-TO-AIR HEAT PUMP WAS INSTALLED IN AN UNOCCUPIED SINGLE-FAMILY RESIDENCE AND OPERATED IN A TEST TO CHARACTERIZE DYNAMIC LOSSES IN CAPACITY AND EFFICIENCY DUE TO CYCLING, FROSTING, AND DEFROSTING. DURING THE HEATING SEASON, DEFROSTING LOSSES WERE RESPONSIBLE FOR 10.2% OF THE TOTAL ENERGY CONSUMPTION, FROSTING LOSSES FOR 3.7%, START-UP TRANSIENT LOSSES FOR 8.5%, AND OFF-CYCLE PARASITICS FOR 3.3%. COOLING MODE STEADY STATE PERFORMANCE WAS DEGRADED FROM THE MANUFACTURER'S RATINGS DUE MOST LIKELY TO A SMALL REFRIGERANT LEAK. HOWEVER, IT WAS FOUND THAT START-UP TRANSIENT LOSSES ACCOUNTED FOR 2.8% OF THE TOTAL ENERGY USE AND OFF-CYCLE PARASITICS FOR 4.4%.

Details

  • Original title: FIELD-MEASURED CYCLING, FROSTING AND DEFROSTING LOSSES FOR A HIGH-EFFICIENCY AIR-SOURCE HEAT PUMP.
  • Record ID : 1987-0288
  • Languages: English
  • Publication date: 1985
  • Source: Source: ASHRAE Trans.
    vol. 91; n. 2B; 537-554; 11 fig.; 13 tabl.; 20 ref.; discuss.
  • Document available for consultation in the library of the IIR headquarters only.

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