"I love Let's rethink heating -"

2022-08-01 22:44:55

ProjectsFactsAboutJobsContact EnEnglish DkDanish Let's rethink heating Geothermal energy is an untapped renewable energy source with great potential. Originating from the Earth’s interior, geothermal energy can be used for district heating. Essentially, it entails harnessing subsurface heat – similar to how we harness energy from the sun and wind today – to serve as a sustainable heating alternative to fossil fuels such as coal and gas. In Denmark, 40% of current electricity consumption is provided by wind turbines. Worldwide, hydroelectric power is widely used. However, in Denmark it plays a minor role – mainly as ‘electricity storage’ at hydroelectric plants in Sweden and Norway. We draw on these stocks when the supply from for example wind turbines or solar cells does not meet our needs. Approximately 10% of Denmark’s current electricity consumption is covered by hydroelectric power. 2% of Denmark’s current electricity consumption as well as 2% of Denmark's district heating is covered by solar power. Out planet's core is almost as hot as the sun’s surface, with a temperature of around 5.400 degrees Celsius. The heat emitted from the core radiates towards the surface and is stored in rocks and subterranean water. This warm water is a massive yet unexploited resource that can be used to heat up our homes. If deployed on a large scale, geothermal energy could potentially provide around 30% of Denmark’s district heating consumption, which corresponds to the heating supply of approximately 600,000 households. Explore geothermal energy in two minutes The geothermal plant Radiators with green heating In the geothermal plant, the heat from the subsurface is transferred to the district heating grid in a closed circuit: First, the hot water is pumped up from the subsoil. Then, the heat from the water is transferred to the district heating system. If the water from the subsoil is not quite hot enough for district heating, heat pumps deliver the final degrees. Finally, the cooled water is pumped back into the subsoil. .st0{fill:url(#SVGID_1_);} .st1{fill:url(#SVGID_2_);} .st2{fill:url(#SVGID_3_);} .st3{fill:url(#SVGID_4_);} .st4{fill:url(#SVGID_5_);} .st5{fill:url(#SVGID_6_);} .st6{fill:url(#SVGID_7_);} .st7{fill:url(#SVGID_8_);} .st8{fill:url(#SVGID_9_);} District heating is the most common form of heating in Denmark, covering approximately 64% of all Danish households. With geothermal energy, thousands of district heating customers can have a sustainable source of heated water running through their radiators. This transition to geothermal energy would not require households to make any changes or adjustments. A geothermal plant consists of at least two underground wells and an above-ground installation. The geothermal water is circulated in a closed loop: The water is pumped up through a production well, and the energy is transferred to the district heating system through a heat exchanger and heat pumps. A heat pump ensures that the water has the right temperature and draws any excess heat out of the geothermal water. Then, the cooled geothermal water is pumped directly back into the underground through an injection well. Two wells are drilled: a production well, from which the hot water is pumped up, and an injection well, into which the cooled water is pumped down again. The wells are placed approximately 1.500 meters apart. The exact distance depends on a number of subsurface factors, and the wells are always placed so as to ensure optimal pressure and temperature conditions in the subsurface. The warm water is pumped up from geothermal underground sandstone reservoirs, i.e., soil layers that lie 1.000-3.000 meters below the Earth's surface. In (or rather under) Denmark, the water temperature in these soil layers ranges from 40-80 degrees Celsius. Get answers on all your questions about geothermal energy here Learn more about geothermal energy Innargi A/S Lyngby Hovedgade 85DK-2800 Kgs. LyngbyDenmark © Innargi A/S Privacy Policy Innargi A/S Lyngby Hovedgade 85DK-2800 Kgs. LyngbyDenmark For general inquiries +45 32 26 88 00 [email protected] Administration Annette Henriksen, Secretary [email protected] For press Asbjørn Haugstrup +45 26 72 94 21 [email protected]