District heating is a separate energy system that forms a natural part of the energy supply for towns and cities and densely populated areas. District heating based on renewable energy sources has a positive environmental effect.
District heating is about heating water. In practical terms, a district heating plant can be compared with a central heating installation that provides one or more buildings with hot water.
The hot water circulates between the heating plant and the customer’s premises in insulated, underground steel pipes. The pipes are laid in trenches, often with other infrastructure such as phone lines and power cables, and they suffer average heat losses of only five to ten percent. Customers use the water for heating through piped underfloor heating or radiators and for heating tap water.
Many different energy sources are used for district heating production, including waste, biofuel, heat pumps, landfill gas, natural gas, propane/butane, electricity and fuel oil. Several different energy sources may be used simultaneously in the district heating plant, which makes for stable and flexible supply of heat to customers.
For more information visit: www.statkraftvarme.no (in Norwegian).