A direct exchange, or DX, geothermal heat pump is a type of ground source heat pump in which refrigerant circulates directly through copper tubing buried in the ground, rather than being confined to the indoor unit with a separate water-and-antifreeze loop carrying heat between the ground and the refrigerant, as in other ground source heat pumps. Running the refrigerant itself through the buried tubing removes the need for that secondary heat-transfer loop and its associated plumbing.
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Classification
MaturityTRL 3: Experimental Proof of Concept 1 Technology TypeGround source heat pump 1 Sources
1. Wikipedia: Direct exchange geothermal heat pump
Introduction, sentence 1Quote, Introduction, sentence 1
a type of ground source heat pump
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