Geothermal energy system and method of operation
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United States of America Patent
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Mar 13, 2018
Issued Date -
N/A
app pub date -
Jul 3, 2008
filing date -
Jul 6, 2007
priority date (Note) -
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Abstract
In an embodiment, a method of operating a geothermal energy system includes selectively connecting each of a plurality of borehole heat exchangers to any other of the plurality of borehole heat exchangers thereby to permit flow of a working fluid between the borehole heat exchangers and to selectively distribute the working fluid within the plurality of borehole heat exchangers. Each borehole heat exchanger has an elongate tube having a closed bottom end and first and second adjacent elongate coaxial conduits interconnected at the bottom end, the first conduit being tubular and surrounded by the second conduit which is annular. Each borehole heat exchanger has a major portion thereof extending in a substantially inclined orientation at an angle of from 3 to 95 degrees from vertical, the borehole heat exchangers being connected to a manifold for the working fluid.
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