Geothermal Electricity – Wikipedia, The Free Encyclopedia
Then they pump water or liquefied carbon dioxide down one borehole, and it comes up the other borehole as a gas. This approach is called hot dry Desalination; Geothermal heat pump; District heating; Binary Cycle; EGS; Heat pump … Read Article

Geothermal Energy – Wikipedia, The Free Encyclopedia
A geothermal heat pump can extract enough heat from shallow ground anywhere in the world to provide home heating, but industrial applications need the higher temperatures of deep resources. The thermal efficiency and profitability of electricity generation is particularly sensitive to temperature. … Read Article

Geothermal heating – Wikipedia, The Free Encyclopedia
A ground-source heat pump uses the shallow ground or ground water (typically starting at 10–12 °C, 50–54 °F) as a source of heat, thus taking advantage of its seasonally moderate temperatures. In contrast, an air-source heat pump draws heat from the air (colder outside air) and thus requires … Read Article