Geothermal Energy-An Attractive Alternative Energy

geothermal alternative energy
According to the German standard VDI 4640 geothermal energy is stored energy as heat beneath the Earth’s solid surface, encompasses the heat stored in rocks, soils and groundwater.

The main energy sources charge of the land are two: the first is the heat recovery of the Earth that can be assessed by the thermal gradient (variation of temperature versus depth), usually increase of 3.3 º C per 100 m depth. (more…)