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HEAT PUMPS - CAPACITY CONTROL AND DEFROST PERFORMANCE TESTS USING DEMAND AND TIME-TEMPERATURE DEFROST CONTROLS.

Author(s) : MERRILL P.

Summary

THE OBJECTIVES WERE TO DEVELOP SIMULATIONS FOR USE IN SEASONAL PERFORMANCE MODELS. FOR - CYCLING AND DEFROST CYCLES, IT WAS FOUND THAT COP AS A FRACTION OF STEADY STATE COP COULD BE PREDICTED WITH POWER LAW RELATIONSHIPS INVOLVING CAPACITY AS A FRACTION OF STEADY STATE CAPACITY. FROST BUILDUP OCCURRED IN A TWO-STEP PROCESS, WITH INITIAL GRADUAL FROST BUILDUP TO A TRANSITION POINT FOLLOWED BY RAPID FROST BUILDUP UNTIL A DEFROST CYCLE WAS INITIATED. HEAT CAPACITIES UNDER FROST BUILDUP CONDITIONS WERE PREDICTED AS A FUNCTION OF OUTDOOR AIR TEMPERATURE AND DIFFERENCE BETWEEN SPECIFIC HUMIDITY OF THE OUTDOOR AIR AND SPECIFIC HUMIDITY OF SATURATED AIR AT OUTDOOR COIL TEMPERATURES.

Details

  • Original title: HEAT PUMPS - CAPACITY CONTROL AND DEFROST PERFORMANCE TESTS USING DEMAND AND TIME-TEMPERATURE DEFROST CONTROLS.
  • Record ID : 1982-0963
  • Languages: English
  • Publication date: 1981
  • Source: Source: ASHRAE Trans.
    vol. 87; n. 1; 381-393; 6 fig.; 5 tabl.; 2 ref.
  • Document available for consultation in the library of the IIR headquarters only.

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