Geothermal energy
Geothermal energy is heat from the Earth’s core. Denmark can exploit this renewable energy by pumping geothermal hot water up from depths of 1.5-3 km and then transferring the heat to the district heating grid through heat exchangers and heat pumps. The geothermal water is then returned to its underground stratum. Opportunities for exploiting geothermal energy depend on the geological structures and the temperature of the underground water.
A survey of the Greater Copenhagen region showed that there is enough geothermal energy to cover 30-50 per cent of Copenhagen’s district heating requirement for several thousand years. At the same time, there are good indications that it is possible to extract geothermal heat in large parts of the rest of Denmark.
Links regarding geothermal energy