Geothermal Heating

Geothermal heating is the direct use of geothermal energy for heating applications. Humans have taken advantage of geothermal heat this way since the Paleolithic era. Approximately seventy countries made direct use of a total of 270 PJ of geothermal heating in 2004. As of 2007, 28 GW of geothermal heating capacity is installed around the world, satisfying 0.07% of global primary energy consumption. Thermal efficiency is high since no energy conversion is needed, but capacity factors tend to be low (around 20%) since the heat is mostly needed in the winter.

Geothermal energy originates from the heat retained within the Earth since the original formation of the planet, from radioactive decay of minerals, and from solar energy absorbed at the surface. Most high temperature geothermal heat is harvested in regions close to tectonic plate boundaries where volcanic activity rises close to the surface of the Earth. In these areas, ground and groundwater can be found with temperatures higher than the target temperature of the application. However, even cold ground contains heat, below 10 feet or 3 meters, the ground is consistently 12.8 °C (55 °F) in moderate climates, and it may be extracted with a heat pump.

Read more about Geothermal HeatingOne Subtype of Geothermal Heating Briefly and Simply Explained, Applications, Extraction, Geothermal Heat Pumps, History, Economics, Geothermal Drilling Risks

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Leading Renewable Heat Technologies - Geothermal Heating
... Heat from the Earth, or geothermal - Geo (Earth) + thermal (heat) - energy can be and already is accessed by drilling water or steam wells in a process similar to drilling for oil ... Geothermal energy is an enormous, underused heat and power resource that is clean (emits little or no greenhouse gases), reliable (average system availability of 95%), and ... A geothermal heating system takes advantage of the consistent temperature found below the Earth's surface and uses it to heat and cool buildings ...
Geothermal Heating - Geothermal Drilling Risks
... In geothermal heating projects the underground is penetrated by trenches or drillholes ... In the spring of 2007 an exploratory geothermal drilling operation was conducted to provide geothermal heat to the town hall of Staufen im Breisgau ...
Water Heating - Geothermal Heating
... In countries like Iceland and New Zealand, and other volcanic regions, water heating may be done using geothermal heating, rather than combustion ...
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... office by applying strategies such as daylighting, radiant heating/cooling with a ground-source heat pump and high energy performance lighting and computing ... daylighting, solar thermal panels for hot water and space heating, a photovoltaic (PV) system that generates more carbon-free electricity than the house requires, and an energy-re. 3.3 Kws of Photovoltaics,Solar Hot Water and Geothermal Heating and Cooling ...

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