Refrigeration – Structural installation – Geographic – e.g. – subterranean feature
Patent
1995-05-02
1996-10-08
Bennett, Henry A.
Refrigeration
Structural installation
Geographic, e.g., subterranean feature
165 45, F25D 2312
Patent
active
055619851
ABSTRACT:
A ground-coupled direct expansion heat pump apparatus includes an earth tap heat exchanger including a plurality of earth contacting tubes connected together in side-by-side relation. A first earth contacting tube defines a vapor refrigerant passageway and a second earth contacting tube provides additional heat transfer with the first earth contacting tube. Moreover, the earth tap heat exchanger includes a liquid refrigerant insulated passageway positioned within the second earth contacting tube. Each of the earth contacting tubes preferably comprises a thermal conductor, such as copper or a non-metallic material suitable for contact with refrigerant, to transfer heat with surrounding earth and with an adjacent earth contacting tube. The liquid refrigerant passageway and the vapor refrigerant passageway are preferably connected together in fluid communication adjacent lower ends thereof. Multiple vapor refrigerant passageways may be provided by additional earth contacting tubes. Method aspects of the invention are also disclosed.
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Bennett Henry A.
Doerrler William C.
ECR Technologies, Inc.
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