What is Geothermy

Knowing about Geothermy

Geothermal energy is a Renewable Energy Source (RES) and exploits the energy that is stored inside the Earth. The existence of this energy is due to the energy emitted by the Sun and stored inside the Earth. It is an inexhaustible and of course pure form of energy. Depending on the geology of each region and the processes that take place inside the Earth, it is divided into the following categories:

Shallow Geothermal (2-25 °C)

It takes advantage of the constant temperature found in the upper geological layers without requiring the existence of a geothermal field. This constant temperature is called the Undisturbed Soil Temperature and is found just 1.5 m below the Earth’s surface. Used for heating, cooling and production of domestic hot water. Shallow geothermal systems are recognized worldwide as the most efficient and environmentally friendly heating-cooling systems available today.

Geothermal resources (Τ > 25 °C)

Based on the temperature level prevailing inside the Earth, geothermal fields are divided into the following categories:

Low enthalpy (25-80 °C)

Used for heating applications (premises, greenhouses), in fish farms and for the production of fresh water.

Medium enthalpy (80-150 °C)

It is used in applications for heating or drying of wood and agricultural products. It is also possible to generate electricity using a closed circuit with freon, which has a low boiling point.

High enthalpy (Τ>150 °C)

Mainly used to produce electrical power .