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METHOD AND APPARATUS FOR COOLING

  • US 20080245083A1
  • Filed: 06/11/2008
  • Published: 10/09/2008
  • Est. Priority Date: 08/15/2006
  • Status: Active Grant
First Claim
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1. A method of calculating net sensible cooling capacity of a cooling unit of the type comprising a compressor, a condenser in fluid communication with the compressor, a thermal expansion valve in fluid communication with the condenser, an evaporator in fluid communication with the thermal expansion valve, and a hot gas bypass valve in fluid communication with the compressor and the evaporator, the method comprising:

  • measuring a discharge pressure from of fluid from the compressor and a suction pressure from the evaporator;

    calculating a condensing temperature of fluid flowing from the compressor and an evaporating temperature of fluid flowing from the evaporator;

    calculating a mass flow rate of fluid flowing from the compressor;

    calculating enthalpy of fluid flowing from the compressor, of fluid flowing from the thermal expansion valve, and of fluid flowing from the evaporator;

    calculating a mass flow rate of fluid flowing through the hot gas bypass valve; and

    calculating net sensible cooling capacity.

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