BBC Environment & Technology — The world’s first floating wind turbine is to be towed out to sea this weekend. Statoil’s Alexandra Beck Gjorv told the BBC the technology, the Hywind, to be put off Norway’s coast - “should help move offshore wind farms out of sight”.
And it could lead to offshore wind farms eventually being located many miles offshore, away from areas where they cause disruption, Ms Gjorv added. This would benefit military radar operations, the shipping industry, fisheries, bird life and tourism.
“Taking wind turbines to sea presents new opportunities,” said Ms Gjorv, of Statoil’s new energy division. “The wind is stronger and more consistent [and] areas are large.”
Floating wind farms are set to be connected to mainland grids via cables across the seabed. The longer the cable, the more expensive it is, so the distance from land is not set to become unlimited, explained Ms Gjorv.
The Hywind, a 2.3 megawatt (MW) wind turbine built by Siemens, combines technologies from both the wind farming industry and the oil and gas sectors, and will be tested off the coast of Norway for two years. In a similar way to how large parts of icebergs are hidden below the sea surface, the turbine has a 100 metre draft that is anchored to the seabed with cables, that can be up to 700 metres long. …
Floating wind farms could later be established off both coasts of North America and off the Iberian peninsula and the coasts of Norway and the United Kingdom, she said. These farms could provide an additional source of energy for countries that have run out of space for their onshore wind farms, or where there is not enough wind on land, Ms Gjorv added. (06/08/09)