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DX system being drilled in the 1980s. 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.
The direct exchange geothermal heat pump (DX) is the oldest type of geothermal heat pump technology where the refrigerant itself is passed through the ground loop. Developed during the 1980s, this approach faced issues with the refrigerant and oil management system, especially after the ban of CFC refrigerants in 1989 and DX systems now are ...
Established in 1987, the International Ground Source Heat Pump Association (IGSHPA) is a nonprofit, membership-based organization that promotes geothermal heat pump technology. It was a outreach unit of the College of Engineering, Architecture and Technology (CEAT) at Oklahoma State University until 2020. In June 2020, the OSU Board of Regents ...
Dandelion is an American geothermal heating supplier in the Northeast United States. [1] Prior to 2017, the company was part of Google X, before turning into an independent company. [2] Dandelion targets providing geothermal heating and cooling (HVAC). The system consists of a heat pump that pipes energy to or from a house. [3]
Direct use of geothermal heat by category in 2015 as adapted from John W. Lund [5] Category GWh/year Geothermal heat pumps 90,293 Bathing and swimming 33,164 Space heating 24,508 Greenhouse heating 7,407 Aquaculture pond heating 3,322 Industrial uses 2,904 Cooling/snow melting 722 Agriculture drying 564 Others 403 Total 163,287
Specifically, the heat pump transfers thermal energy using a heat pump and refrigeration cycle, cooling the cool space and warming the warm space. [1] In winter a heat pump can move heat from the cool outdoors to warm a house; the pump may also be designed to move heat from the house to the warmer outdoors in summer.