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Our planet constantly produces energy in the form of heat; from the deepest areas it spreads towards the surface: this is the so called flow of heat or geothermal flow. The heat of the sun heats the Earth’s surface with a flow that is almost 6,000 times greater than what is produced from inside the Earth. However the geothermal flow, that is constant and continuous, is an important source of energy, with an average of 0.06 watts per square metre; from the entire surface of the Earth, a quantity of heat, equal to approximately 30,000 billion watts is radiated.
Use of geothermal energy for domestic heating, up to only a few years ago, suffered from two severe limitations which drastically prevented its diffusion: it was possible only at relatively high temperatures (60 – 80°C) and only in the direct vicinity of the geothermal fields because it was not possible to transport the heat too far away from the source, nor use it at low temperatures.
Recent technological developments now enable, through the use of particular equipment known as heat pumps, to exploit the Earth’s heat also when the temperatures are not particularly high (12-.14°C). This has determined a new and very important step forward in the geothermal sector: with the new systems it is possible in any area of the Earth, in any geological or climatic condition to obtain energy that is sufficient for a normal family’s domestic heating and hot water consumption.

subjects dealt with in Geothermal

energia_400x225_0051_conoscere la geotermia

Geothermal knowledge

Our planet constantly emits energy in the form of heat, which propagates from deeper ground towards the surface. This is…

energia_400x225_0049_i campi geotermici

Geothermal fields

Zones that are characterised by a high and anomalous heat flux are those where the release of energy from the…

energia_400x225_0048_impianti geotermici

Geothermal plants

Geothermal electricity power plants can be of different types; “back pressure system” if the steam, after being exploited , is…

energia_400x225_0052_ambiente e territorio

Subsoil heat for our home

A practically inexhaustible source of energy to heat our homes at a very low cost and in a clean and…

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  • Green maple leaves

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    7miliardi

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  • carbon_foot

    23 October 2013 / Air

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from the Multimedia section

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curiosities

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