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  2. Closed-loop geothermal - Wikipedia

    en.wikipedia.org/wiki/Closed-loop_geothermal

    Closed-loop geothermal systems (also known as “advanced geothermal systems” or “AGS”) are a type of engineered geothermal energy system containing subsurface working fluid that is heated in a hot rock reservoir without direct contact with rock pores and fractures.: [1] [2] [3] Instead, the subsurface working fluid stays inside a closed loop of deeply buried pipes that conduct Earth’s ...

  3. Ground-coupled heat exchanger - Wikipedia

    en.wikipedia.org/wiki/Ground-coupled_heat_exchanger

    Earth-air heat exchangers can be analyzed for performance with several software applications using weather gage data. These software applications include GAEA, AWADUKT Thermo, EnergyPlus, L-EWTSim, WKM, and others. However, numerous earth-air heat exchanger systems have been designed and constructed improperly, and failed to meet design ...

  4. Eavor Technologies - Wikipedia

    en.wikipedia.org/wiki/Eavor_Technologies

    Eavor-Loop is a closed-loop geothermal energy extraction system. It is a buried well system consisting of two vertical wells several kilometers deep connected by an extended system of interconnected multilaterals. Multilaterals are drilled connecting the vertical wells, parallel to each other.

  5. File:Ellis wormhole loop geodesics.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Ellis_wormhole_loop...

    Ellis_wormhole_loop_geodesics.pdf (720 × ... terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software ...

  6. Ground source heat pump - Wikipedia

    en.wikipedia.org/wiki/Ground_source_heat_pump

    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 ...

  7. Glossary of geothermal heating and cooling - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_geothermal...

    Unlike the closed loop in a Ground Source Heat Pump, which is used for small-scale residential heating and cooling, Closed-Loop Geothermal Systems are used for utility-scale energy production (typically >1 megawatt). A Closed-Loop Geothermal System is sometimes referred to as an Advanced Geothermal System (AGS).

  8. Direct exchange geothermal heat pump - Wikipedia

    en.wikipedia.org/wiki/Direct_exchange_geothermal...

    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.

  9. National Geothermal Data System - Wikipedia

    en.wikipedia.org/wiki/National_Geothermal_Data...

    The National Geothermal Data System (NGDS) is an American distributed data network that collects and provides public access to digital geothermal exploration and development information. Data includes borehole temperature measurements, geothermal gradients , active faults , and geochemical analyses.