Geothermal energy is found in the form of heat beneath the solid surface of the planet. In most parts of Europe, no frost is encountered the whole year round at a depth of 1.5 m. At a depth of 10 m, we have a constant temperature of approx. 10°C in any season and that typically increases by 3°C with every 100 m of depth. The geothermal heat is brought to a temperature suitable for heating purposes by a heat pump. In most cases, it is possible to obtain 50% of required heat from the ground, thereby emitting 50% less CO2 than a conventional oil heating system. Concrete core activation is a heating and cooling system based on simple physical principles to create a low cost process. Concrete has a large heat storage capacity and water is a good heat conductor.
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