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.
Facts
Classification
MaturityTRL 3: Experimental Proof of Concept 1 Technology TypeGround source heat pump 1 Connections
Uses Source
Source Wikipedia: Direct exchange geothermal heat pump
Sources
1. Wikipedia: Direct exchange geothermal heat pump
Introduction, sentence 1
a type of ground source heat pump
Uses Source: Geothermal Energy, Wikipedia article lead
A direct exchange (DX) geothermal heat pump is a type of ground source heat pump in which refrigerant circulates
In Group: Geothermal Heat Pumps and Direct Use, Lead
A direct exchange (DX) geothermal heat pump is a type of ground source heat pump in which refrigerant circulates through copper tubing placed in the ground unlike other ground source heat pumps where refrigerant is restricted to the heat pump itself with a secondary loop in the ground filled with a mixture of water and anti-freeze.
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