Refrigeration – Structural installation – Geographic – e.g. – subterranean feature
Patent
1997-08-20
1999-09-07
Bennett, Henry A.
Refrigeration
Structural installation
Geographic, e.g., subterranean feature
165 45, F25D 2312
Patent
active
059469285
ABSTRACT:
A direct expansion geothermal heating/cooling system wherein the interior air handler is sized via 100 cubic inches of interior heat exchange tube volume per 12,000 BTUs of maximum design capacity; wherein the thermal expansion valves are sized to the tonnage capacity of the air handler's design; wherein the subterranean heat exchange tubing consists of 1/8 inch to 3/16 inch outside diameter tubing with outside diameter to tube length ratios of between 1/6,400 and 1/9,600, and where the interior diameter to length ratios are between 1/9,411 and 1/18,462; wherein the interior volume of the subterranean heat exchange tubing is within 1% of the interior volume of the interior air handler's heat exchange tubing; wherein at least 40 square feet of subterranean heat exchange tubing is proportionately exposed to a 500 square foot area of earth per 12,000 BTUs of system design capacity; wherein one or more of the subterranean heat exchange tubes are finned, with fins spaced at least 1/4 inch apart; wherein the compressor's design capacity is between 20% and 33.33% less than the interior air handler's design; where the receiver and accumulator are about 20% to 50% smaller than conventionally sized; and where the geothermal heat exchange tubing is accessed via dual, or multiple, distributors and/or is installed in a vertical or angled slot from 1 inch to 1 foot wide, which is backfilled with powdered stone, heat conductive fill, flowable fill, concrete or the like.
REFERENCES:
patent: 2503456 (1950-04-01), Smith
patent: 3183675 (1965-05-01), Schroeder
patent: 5025634 (1991-06-01), Dressler
patent: 5224357 (1993-07-01), Galiyano
patent: 5461876 (1995-10-01), Dressler
patent: 5671608 (1997-09-01), Wiggs
patent: 5758514 (1998-06-01), Genung
Bennett Henry A.
Jones Melvin
Patterson Mark J.
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