StatoilHydro building first offshore floating wind turbine
Posted: 22 May 2008
StatoilHydro has decided to build the world's first full scale floating wind turbine, Hywind, and test it over a two-year period offshore Karmøy.
The company is investing approximately 400 million NOK. Planned startup is autumn 2009.
The project combines known technology in an innovative way. A 2.3 MW wind turbine is attached to the top of a so-called Spar-buoy, a solution familiar from production platforms and offshore loading buoys.
"We have drawn on our offshore expertise from the oil and gas industry to develop wind power offshore," said Alexandra Bech Gjørv, head of New Energy in StatoilHydro.
The rotor blades on the floating wind turbine will have a diameter of 80 metres, and the nacelle will tower some 65 metres above the sea surface. The floatation element will have a draft of some 100 metres below the sea surface, and will be moored to the seabed using three anchor points. The wind turbine can be located in waters with depths ranging from 120 to 700 metres.
"Taking wind turbines to sea presents new opportunities. The wind is stronger and more consistent, areas are large and the challenges we are familiar with from onshore projects are fewer," said Alexandra Bech Gjørv.
The pilot project will be assembled in Åmøyfjorden near Stavanger and is to be located some 10 kilometres offshore Karmøy in the county of Rogaland. The wind turbine itself is to be built by Siemens. Technip will build the floatation element and have responsibility for the installation offshore. Nexans will lay cables to shore, and Haugaland Kraft will be responsible for the landfall. Enova is supporting the project with 59 million NOK.
StatoilHydro is allocating in excess of 400 million NOK to building and developing the pilot, as well as research and development of the wind turbine concept. The goal of the pilot is to reduce costs so that floating wind power can compete in the power market.
"Floating wind power is not mature technology yet, and the road to commercialization and large scale development is long. An important aspect of the project is therefore research and development," said Alexandra Bech Gjørv.
The company has entered into a technology development agreement with Siemens for the project. The wind turbines must function optimally even in large waves.
Posted by Richard Price, Editor EnergyME.com
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