Nesjavellir Geothermal Power Station

Coordinates: 64°06′29″N 21°15′23″W / 64.10806°N 21.25639°W / 64.10806; -21.25639
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Nesjavellir Geothermal Power Station
Nesjavellir Geothermal Power Station
LocationGrímsnes- og Grafningshreppur
Coordinates64°06′29″N 21°15′23″W / 64.10806°N 21.25639°W / 64.10806; -21.25639
Commission dateMay 1990
Owner(s)ON Power
Geothermal power station
TypeFlash steam
Min. source temp.190 °C (374 °F)
Wells21 in use
Max. well depth2,000 m (6,600 ft)
Hot water output
  • 1,100 L/s
Combined cycle?Yes
Thermal capacity300 MWt
Power generation
Units operational4 × 30MW
Nameplate capacity120 MWe
External links
CommonsRelated media on Commons

The Nesjavellir Geothermal Power Station (Icelandic: Nesjavallavirkjun, Icelandic pronunciation: [ˈnɛːsjaˌvatlaˌvɪr̥cʏn]) is the second-largest geothermal power station in Iceland. The facility is located 177 m (581 ft) above sea level in the southwestern part of the country, near Þingvellir National Park and the Hengill mountain range, about 30 km east of central Reykjavík. The power station is owned and operated by ON Power.

Plans for utilizing the Nesjavellir [ˈnɛːsjaˌvɛtlɪr̥] area for geothermal power and water heating began in 1947, when boreholes were drilled to evaluate the area's potential for power generation. Research continued from 1965 to 1986. In 1987, construction of the plant began, and the cornerstone was laid in May 1990. The station produces approximately 120 MW of electrical power; it also delivers around 1,100 litres (290 US gal) of hot water 82–85 °C (180–185 °F) per second - with a heating capacity of 150 MWt, serving the space heating and hot water needs of the Capital Region.

Panoramic view of the power station complex.
Penstocks at the power station complex.

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