Direct refrigerant geothermal heat exchange or multiple source subcool/postheat/precool system therefor

  • US 6,167,715 B1
  • Filed: 10/06/1998
  • Issued: 01/02/2001
  • Est. Priority Date: 10/06/1998
  • Status: Expired due to Term
First Claim
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1. A direct geothermal heat exchange refrigerant subcool system comprising in combination:

  • a) a subcooler connected in fluid communication with an output of a condenser of an air conditioner, refrigeration unit, or heat pump enabling a refrigerant to flow through said subcooler;

    b) a secondary fluid refrigerant subcool system for subcooling the refrigerant that had previously passed through the condenser including at least one secondary tube thermally connected to a tube carrying the liquid refrigerant;

    c) said subcooler and secondary thermally connected tubes being buried in the ground for direct geothermal heat exchange between the refrigerant and the earth; and

    d) means for controlling the rate of flow of fluid through said secondary tube for purposes of additional auxiliary sub-cooling or for purposes of preventing geothermal saturation, to provide the maximum available subcooling of the liquid refrigerant.

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