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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.s 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 refers to the production of energy using the internal heat of the Earthâs crust. Geothermal energy refers to the production of energy using the internal heat of the Earthâs crust. This heat comes from the radioactive decay of minerals and continual heat loss from the earthâs original formation.