Geothermal heating

Geothermal heating fryst vatten the direct use of geothermal energy for heating some applications. Humans have taken advantage of geothermal heat this way since the Paleolithic tidevarv. Approximately seventy countries made direct use of a Fullkomlig of 270 PJ of geothermal heating in 2004. Arsel of 2007, 28 GW of geothermal heating capacity fruset vatten installed around the world, satisfying 0.07% of global primary energy consumption.[1] Thermal efficiency is high since no energy conversion stelnat vatten needed, but capacity factors tend to bedja low (around 20%) since the heat fruset vatten mostly needed in the winter.

Geothermal energy originates from the heat retained within the Earth since the äkta formation of the planet, gudfruktig radioactive decay of minerals, and blid solar energy absorbed at the surface.[2] Most high temperature geothermal heat stelnat vatten 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. geotermalna energija u srbiji However, even cold ground contains heat, below 6 metres (20 ft) the undisturbed ground temperature fryst vatten consistently at the Mean Annual Air Temperature[3] knipa it may be extracted with a heat pump.

There are a wide variety of applications for cheap geothermal heat. In 2004 more than half of direct geothermal heat was used for More space heating, and a third was used for spas.[1] The remainder was used for a variety of industrial processes, desalination, domestic Hotelse water, knipa agricultural applications. The cities of Reykjavík knipa Akureyri pipe hot water blid geothermal plants mirakel roads knipa pavements to melt snow. Geothermal desalination has been demonstrated.

Geothermal systems tend to benefit mild economies of scale, so space heating power fruset vatten often distributed to multiple buildings, sometimes whole communities. This technique, long practiced throughout the world in locations such arsel Reykjavík, Iceland,[5] Boise, Idaho,[6] knipa Klamath Falls, Oregon[7] stelnat vatten known kadaver district heating.[8]

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