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2. Ground source heat pump - Wikipedia

   en.wikipedia.org/wiki/Ground_source_heat_pump

   A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.

3. Geothermal heating - Wikipedia

   en.wikipedia.org/wiki/Geothermal_heating

   In geothermal heating projects the underground is penetrated by trenches or drillholes. As with all underground work, projects may cause problems if the geology of the area is poorly understood. In the spring of 2007 an exploratory geothermal drilling operation was conducted to provide geothermal heat to the town hall of Staufen im Breisgau.

4. Little-known but efficient, a different way to heat and cool ...

   www.aol.com/news/little-known-efficient...

   Residential geothermal heat pumps currently make up just 1% of the U.S. heating and cooling market. But they're 20% of the European market, due to a long history of higher fossil fuel prices and ...

5. 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 ...

6. Geothermal energy will heat and cool this Cudahy home. Find ...

   www.aol.com/geothermal-energy-heat-cool-cudahy...

   Beginning construction and how the geothermal system works. He began construction on the home in early December with the installation of a horizontal loop field by G. O. Loop of Fox Lake about 8 ...

7. District heating - Wikipedia

   en.wikipedia.org/wiki/District_heating

   The Spittelau incineration plant is one of several plants that provide district heating in Vienna, Austria. Animated image showing how district heating works. District heating (also known as heat networks) is a system for distributing heat generated in a centralized location through a system of insulated pipes for residential and commercial heating requirements such as space heating and water ...