Barrow Offshore Wind Farm

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Barrow Offshore Wind Farm
Barrow Offshore wind turbines NR.jpg
Barrow Offshore Wind Farm is located in England
Barrow Offshore Wind Farm
Location of Barrow Offshore Wind Farm off the coast of England
Country England, United Kingdom
Location East Irish Sea, south west of Walney Island, Barrow-in-Furness, Cumbria
Coordinates 53°59′N 3°17′W / 53.983°N 3.283°W / 53.983; -3.283Coordinates: 53°59′N 3°17′W / 53.983°N 3.283°W / 53.983; -3.283
Status Operational
Commission date 2006
Owner(s) DONG Energy
Wind farm
Distance from shore 7 km (4 mi)
Hub height 75 m (246 ft)
Rotor diameter 90 m (300 ft)
Power generation
Units operational 30
Make and model Vestas Wind Systems
Nameplate capacity 90MW

The Barrow Offshore Wind Farm is a 30 turbine 90MW capacity offshore wind farm in the East Irish Sea approximately 7 kilometres (4.3 mi) south west of Walney Island, near Barrow-in-Furness, Cumbria, England.

Construction of the wind farm took place between 2005 and 2006. The farm is operated by Barrow Offshore Wind Limited, owned by Dong Energy.

Planning and design[edit]

Barrow wind farm was a UK Round 1 wind farm development originally developed by Warwick Energy Limited.[1] A planning application was submitted in 2001,[2] and planning consent given in March 2003;[3] the project was sold to Centrica (25%, c.£22.5million), Dong Energy (37.5%), and Statkraft (37.5%) in Sep. 2003.[4][5] The estimated cost of developing the project was £100million, of which £10million was provided by a UK government grant.[5][6] In 2004 Centrica and Dong Energy bought the Statkraft stake, forming a 50:50 joint venture in the development.[7]

The initial Warwick Energy proposal was for a 30 turbine wind farm 7 km southwest of Walney Island (Cumbria), with a generating capacity of up to 108MW; electrical power supply to the mainland was to be via a ~25 km long 132kV cable making groundfall near Heysham, with connection to the mainland electrical grid at an extension to an existing electricity substation south of Heysham nuclear power station.[8] Turbines were expected to have ~50m radius blades, with a 75m hub height, and be situated in water at a depth of ~20m, with a ~32.5m sub-sea bed monopile foundation; the turbines were to be spaced approximately 500m apart in four rows aligned to face the prevailing southwestery winds, with a row spacing of ~750m.[9]

Construction[edit]

Offshore substation, with jackup ship and wind turbine in background (2006)

In July 2004 Kellogg Brown & Root Ltd and Vestas-Celtic Wind Technology Ltd were awarded the contract to install and commission the wind farm, and to operate the wind farm for 5 years.[10] A 30 turbine wind farm with a capacity of 90MW was constructed by the consortium between July 2005 and May 2006. The main construction base was at Harland and Wolff's shipyard in Belfast.[11] In exceptions where pile driving of monopile foundations failed drilling was used to form the monopile foundations.[11][12]

IEC 1A class Vestas V90-3.0MW wind turbines were used, mounted on a 75m tower connected to 4.75 m (15.6 ft) monopiles supplied by a Sif/Smulders joint venture.[13] Turbine to offshore substation electric connection were at 33kV, with the voltage stepped up to 132kV at an offshore substation supplied by Areva T&D (transformer), Sif/Smulders (superstructure and monopile) and designed by KBR and Mott MacDonald. Cables were supplied by Prysmian (33kV) and Nexans (132kV).[14]

Construction of the wind farm was completed in June 2006 with the first power generated in March 2006.[15] The operator is Barrow Offshore Wind Limited, owned by Centrica and Dong.[1]

Operation[edit]

Since 2008 (to 2012) the farm operated at between 30 and 40% capacity factor, generating between 240 and 320 GWh of electrical energy per year.[16]

In 2011 regulatory changes required Dong/Centrica to divest the electrical transmission assets of the wind farm, which were sold to TC Barrow OFTO Ltd. for £34 million.[17]

In 2014 Dong Energy acquired Centrica's 50% holding in the wind farm.[18]

See also[edit]

References[edit]

  1. ^ a b Barrow (4C Offshore) Developers/Owners/Operators
  2. ^ Barrow Offshore Wind Farm (LORC) Timeline & Track Records
  3. ^ "Barrow Offshore Wind Farm", www.warwickenergy.com, archived from the original on 10 December 2003 
  4. ^ "Offshore Wind Farms", www.warwickenergy.com, archived from the original on 15 October 2004 
  5. ^ a b Johnston, Lachlan (13 September 2003), "Centrica backs windfarm in the Irish Sea", www.telegraph.co.uk 
  6. ^ Centrica forms joint venture to acquire offshore windfarm company (press release), Centrica, 12 September 2003 
  7. ^ "Centrica pays £2 million to increase stake in Barrow windfarm project", www.icis.com, 23 July 2004 
  8. ^ Barrow wind farm (Non technical summary) (Warwick Energy) pp.1–2
  9. ^ Barrow wind farm (Non technical summary) (Warwick Energy) pp.2–3
  10. ^ Centrica announces construction contracts for Barrow windfarm (press release), Centrica, 23 July 2004 
  11. ^ a b "Barrow Offshore Wind Farm", www.mpi-offshore.com, 15 June 2006 
  12. ^ Beyer, Manfred; Brunner, Wolfgang G., New BAUER Flydrill system drilling monopiles at Barrow Offshore Wind Farm UK, BAUER Maschinen GmbH. 
  13. ^ Barrow Offshore Wind Farm (LORC) Turbine, Tower & Substructure
  14. ^ Barrow Offshore Wind Farm (LORC) Substations, Inter-Array & Export Cables
  15. ^ Barrow Offshore Wind Farm (Dong)
  16. ^ Barrow Offshore Wind Farm (LORC) Production and Performance
  17. ^ Disposal of Barrow offshore wind farm transmission assets (press release), Centrica, 27 September 2011 
  18. ^ "Centrica exits Barrow", renews.biz, 19 December 2014 

Sources[edit]

External links[edit]