The European Geothermal Energy Council (EGEC) defines geothermal energy as the energy stored in form of heat beneath the surface of the earth . This definition covers heat stored in rocks, soil and groundwater, whatever its temperature, depth or origin.

To this definition he could add energy that is stored in surface water, either inland or marine.

The Geological and Mining Institute of Spain defines geothermal energy as the abundant renewable energy sources, exploitation viable, technically and economically, avoiding emissions of greenhouse gases and the existence in our subsoil is tested.


Economic: The initial investment is very similar wing of a classic heating and cooling, but operating costs are much lower, 50-70% less energy consumption
-. DHW heating and swimming pools for free to allocate the heat generated
-. Absence of external equipment fireplaces.
- significant space savings, as a single team, and trouble location

Green and clean:. a geothermal exploitation leaves little waste and does not degrade as climate They do fossil fuels.

Renewable 100%: The requirement of the CTE DB HE-4

Efficient fulfilled as we generate 100% of the energy demand with geothermal, making it possible to dispense with solar collectors. Allows up to 70% savings over conventional air conditioning systems, cooling and ACS.
Outperform classical conditioning systems enabling energy savings of 30-70% on heating and 20-50% in cooling (www.igme .com, May 2010) or the technology they use geothermal heat pumps has been classified by the Agency for Environmental Protection of the United States as the most efficient heating and cooling existing today (, May 2010 ).

Continuous power: The main advantage over solar thermal is that this system is not affected by weather or seasonal conditions. It is available 24 hours a day, 365 days a year

Energy for everybody. Unlike fossil reserves most commonly used today, these reserves are not located in some particular areas. The underground heat is present on all continents. Of course, according to the geological formation or composition of the rocks, this energy will be more or less easy to extract.


Forecasts of geothermal energy in Spain are good: in the case of the production of electricity and thermal uses, has a great potential to be a competitive source of energy over other renewable energy sources that are already more established in Spain.


Regarding the sites of low and very low temperatures (GHP), provides a major growth sector in both real estate and industry, because it is an efficient technology for heating, cooling and water hot with some outstanding energy savings. Crediting this great efficiency, the Environmental Protection Agency of the United States, has classified geothermal heat pumps (GHP) as the most efficient technologies for heating and cooling.

Other considerations suggest that growth in the sector are:

- The entry into force in March 2006 of the Technical Building Code, where the new housing is required are requirements in energy savings.

- Market development has led to the existence of a wide range of heat pumps with a significant range of powers, affordable prices, with high reliability and does not require highly qualified personnel for installation and maintenance.

- The vastness of areas suitable for the installation of such systems.

- Subsidies that already exist in some regions.










Geothermal heat pumps

In general, a geothermal heat pump is a machine that transfers heat from a cold reservoir to a warm using a relatively small amount of work (25% than a conventional system). Therefore, the advantage possessed heat pumps over other systems is its ability to generate hot and cold at the same time and use them so changed, the energy in the room (bit cold) water or both the earth, and that allows you to be heated interior rooms (hot spot) with a relatively small input power.


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