Scotland Bids for First Floating Windfarm

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Written by Martin Lynch, European News Editor for Industrial Info (Galway, Ireland)--Scotland has approached Norwegian oil and gas company Statoil ASA (NYSE:STO) (Stavanger, Norway) in an effort to become the home of the first commercial-scale floating offshore windfarm.

Scotland's First Minister Alex Salmond met with Statoil this week to discuss locating the windfarm at one of two Scottish sites. In September 2009, the first floating Hywind turbine was installed in waters 200 metres deep at Karmoy, which is about 10 kilometres off Norway's coast. The turbine has a generating capacity of 2.3 megawatts (MW). The company says that the turbine, which it introduced last June, has exceeded expectations for performance and stability. For additional information, see June 4, 2009, article - StatoilHydro to Develop World's First Floating Wind Turbine in Norway.

Statoil is known to be interested in Scottish sites off the coasts of Lewis and Aberdeenshire. Between three and five Hywind turbines are expected to be installed at the chosen site. Others competing to host the first commercial-scale floating farm include Maine in the United States.

"The Hywind II windfarm project would see a Scotland-Norway collaboration push the boundaries of deepwater offshore wind beyond the 100-metre mark and open up vast areas of the world's oceans to the development of wind energy for the first time," said Salmond. "Today's meeting with Statoil was very positive, building on Scottish Development International's ongoing engagement with the company. This is exciting technology, and I was extremely interested to hear more about the ongoing success of Hywind, and about Statoil's future plans for the project."

Statoil said it will choose one of the locations early next year.

In June, Norway's Vestavind Kraft AS (Bergen, Norway) announced that it plans to invest 1.94 billion euros ($2.5 billion) to construct Norway's first commercial-scale floating windfarm. The massive windfarm will consist of six modules, each consisting of 36 floating pylons, each with capacities of 5 MW. With steady winds, the facility is anticipated to produce 1,080 MW. Construction is expected to begin in January 2015. The windfarm will be located 56 kilometres from the Stadlandet shore in the North Sea. For additional information, see June 23, 2010, article - Norwegian Company Announces Ambitious Wind Plans.

Floating wind turbines are seen as the only feasible method of harnessing the greater wind power experienced further out at sea, where water depths are too great for traditional offshore wind turbines. Underneath the Hywind turbine is a steel and concrete buoy that extends about 100 metres below the surface and contains ballast tanks. This allows for a deep center of gravity that offsets any unnecessary movement. The buoy is anchored to the ocean floor by a three-point mooring spread and can be deployed in waters up to 700 metres deep.

The buoy was constructed by Technip SA (EPA:TEC) (Paris, France), which has extensive experience in oil, gas and petrochemical engineering. Siemens AG (NYSE:SI) (Munich, Germany) provided the 2.3-MW turbine, which has 80-metre diameter blades. The turbine is mounted about 65 meters above the surface of the sea on a surface tower structure that is also supplied by Siemens.

Other companies with smaller operational floating wind turbines include Dutch company Blue H Technologies (Oosterhout, Netherlands), which installed the world's first floating wind turbine prototype off the coast of Puglia in southern Italy in December 2007. The company has since received the green light for a 90-MW floating offshore windfarm off the southern Italian coast. Norwegian company Sway (Radal, Norway) is also working on its own floating wind turbines. The company is currently conducting onshore testing of a 10-MW floating wind turbine--the world's largest--but it will not be ready for deployment in deep water for a number of years.

IIR's Renewable Energy Database provides extensive coverage on the wind energy, geothermal, hydroelectric, landfill gas-to-energy and utility-scale solar power plants throughout North America, and is now expanding coverage across the world.

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