The idea of taking advantage of the high temperatures that reign inside earth was generated after observing the great quantity of hot water and/or steam, or hot air (the so-called geothermal fluids) that is gushing from the ground, in many locations over the world. In other places, where there such a privilege does not exist, drillings are being made in great depths to find these geothermal fluids.
Geothermal is a mild and renewable energy source which, using today’s technological achievements, is able to cover the energy need for heating, and in some cases the need for power production too.
The temperature of the geothermal fluid differs from place to place and its value varies from 25 oC to 350 oC.
In cases where geothermal fluids have a temperature over 150 oC, geothermal energy can mainly be used for power production.
When the temperature is lower, geothermal energy can be used for heating houses and other buildings, for greenhouses, cattle-farms, fish-farms, e.t.c.
Greece, due to its subsoil, is rich in geothermal energy. This energy is being exploited today with an increasing rate. In South Aegean the deposits of geothermal fluids have very high temperatures, whereas all over the country there are regions with deposits of smaller temperatures.
What are the main features of geothermal energy of low temperature?
Compared to conventional methods for heating and cooling, it’s 50-70 % more efficient when heating and 20-40 % more efficient when cooling.
Free water during summertime.
Reliable and durable.
One unit for heating and cooling.
Very quiet operation.
Kind to the environment.
Inexhaustible and clean.
The most important considerations when choosing a geothermal heating/cooling system are convenience, comfort and economy. Too often, economy means sacrificing comfort. However, with a Geothermal Heat Pump (GHP) system, a homeowner can have both. Geothermic heat pumps provide maximum ease year-round and also reduce the energy cost. The GHP simply uses the earth as a heat sink to heat and cool a structure. With a GHP, residential owners can cut energy consumption by 20% to 50%, reduce maintenance costs, and improve the reliability of their heating and cooling systems while conserving natural resources.
What are the environmental benefits of geothermal systems?
Geothemal systems conserve energy and, because they move heat that already exists rather than burning something to create heat, they reduce the amount of toxic emissions in the atmosphere. They use renewable energy from the sun, and because the system doesn’t rely on outside air, keeps the air inside of buildings cleaner and free from pollens, outdoor pollutants, mold spores, and other allergens.
Ways of installation