Horns Rev 2

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Horns Rev 2
Horns Rev 2 is located in North Sea
Horns Rev 2
Location of Horns Rev 2
Country Denmark
Location Horns Rev, East North Sea
Coordinates 55°36′00″N 7°35′24″E / 55.60000°N 7.59000°E / 55.60000; 7.59000Coordinates: 55°36′00″N 7°35′24″E / 55.60000°N 7.59000°E / 55.60000; 7.59000
Status Operational
Construction began May 2008
Commission date November 2009
Construction cost €448 million[1]
Owner(s) DONG Energy
Wind farm
Type Offshore
Max. water depth 9–17 m (30–56 ft)
Distance from shore 30 km (19 mi)
Hub height 68 m (223 ft)
Rotor diameter 93 m (305 ft)
Rated wind speed 10 m/s (33 ft/s)
Power generation
Units operational 91
Make and model Siemens Wind Power: SWP 2.3-93
Nameplate capacity 209 MW
Capacity factor 47.7%[2]
Horns Rev 2's location in relation to the wind farms of the German Bight

Horns Rev 2 is an offshore wind farm located on Horns Rev (Horns Reef) in a shallow area in the eastern North Sea, about 30 km (19 mi) off the westernmost point of Denmark, Blåvands Huk. When inaugurated in 2009, Horns Rev 2 was the largest offshore wind farm in the world until Thanet Wind Farm opened on 23 September 2010.[3][4]


In May 2008, Dong Energy began construction of the second wind farm in the Horns Rev area, Horns Rev 2. Construction was completed in September 2009[5] and was inaugurated on September 17, 2009 by Prince Frederik on the Poseidon accommodation platform.[3] For the year of 2012, HR2 reached a capacity factor of 52.0%.[2] It receives 51.8 øre/kWh for the first 50,000 hours, paid by electricity consumers.[6] The farm has had some cable outages,[7][8] and blades are being renovated.[9]

Technical description[edit]

The Horns Rev 2 consists of 91 Siemens Wind Power SWT 2.3-93 wind turbines with a total generating capacity of 209 MW.[4] The foundations are monopiles like on Horns Rev 1.

Accommodation platform[edit]

It has the first offshore wind farm accommodation platform in the world, named Poseidon. It is connected by walkway to the transformator platform,[10] and is 750 square metres (8,100 sq ft) large with 3 decks and weighs 422 tons. On-site accommodation is cheaper and more efficient than transporting service personnel by boat 2 hours from Esbjerg harbour 60 kilometres (37 mi) away. A turbine is visited 10 times a year on average, mostly for routine service, and 1-2 times for fixing faults.[11] Flying people by helicopter to turbines like on Horns Rev 1 is not possible on Horns Rev 2 as the turbines there are not built for it, although the transformator platform has a helipad.[12] Poseidon has 24 rooms of 12 square meters each fitted with TV and internet. There is a gym, kitchen, dining room, laundry room, and a study room. Inspired by Poseidon, a similar platform is being built at the DanTysk wind farm.[13]

See also[edit]


  1. ^ "Where the Wind Blows". Nordic Investment Bank. Retrieved 1 December 2011. 
  2. ^ a b Andrew (2017-01-26). "Capacity factors at Danish offshore wind farms". energynumbers.info. Retrieved 2017-02-11. 
  3. ^ a b Matthew McDermott. "Denmark Inaugurates World's Largest Offshore Wind Farm - 209 MW Horns Rev 2" Treehugger
  4. ^ a b Stromsta, Karl-Erik (17 September 2009). "DONG cuts the ribbon at 209MW Horns Rev 2 project". ReCharge. NHST Media Group. (subscription required). Retrieved 19 November 2010. 
  5. ^ James Kanter. Largest Offshore Wind Farm to Go Online Green Inc., 15 September 2009.
  6. ^ "Fremskrivning af PSO-udgifter" page 4. Danish Energy Agency, 19 May 2014. Retrieved: 17 January 2015.
  7. ^ http://ing.dk/artikel/soekabel-til-horns-rev-2-er-ude-af-drift-179590
  8. ^ http://energinet.dk/DA/El/Nyheder/Sider/Kabel-til-havmoelleparken-Horns-Rev-2-er-igen-i-drift.aspx
  9. ^ http://ing.dk/artikel/dong-og-siemens-giver-horns-rev-2-storstilet-vinge-makeover-173761
  10. ^ Accommodation Platform Archived 2011-07-19 at the Wayback Machine., DONG Energy. Retrieved February 2010.
  11. ^ Krøyer, Kent. I kamp mod bølgerne: Teknikere besøger hver havmølle 10 gange om året (in Danish) Ing.dk, 14 December 2009. Accessed: 14 January 2015.
  12. ^ Naming Ceremony Archived 2011-07-19 at the Wayback Machine., DONG Energy. Retrieved February 2010.
  13. ^ Wittrup, Sanne. Vattenfall bygger verdens største beboelsesplatform ved havmøllepark (in Danish) Ing.dk, 14 January 2015. Accessed: 14 January 2015.

External links[edit]