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Abstract

The invention is a heat exchange system and method relying on circulation of a fluid through a loop to exchange thermal energy with the ground. A metallic shell pipe, optionally inserted into the ground by the direct push method, is in intimate thermal contact with the ground and accommodates one or two U-tube loops placed internally followed by introduction of a thermally conductive filler to occupy remaining volume and to thermally connect the outer radii of the U-tube pipes to the inner radius of the shell pipe. The U-tube loops are formed of either metallic pipes for lowest thermal resistance or plastic pipes for lowest cost. Shell pipe volume is precisely known, allowing for precise metering of filler, either liquid or particulates suspended in a liquid. The semi-sealed shell pipe provides superior environmental protection, eliminating potential for ground water contamination and allowing use of corrosion-susceptible pipe materials such as copper.

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First Claim