Kvaerner Turbin AB is working on a concept for a third generation of megawatt scale wind turbines in Sweden. Utility Vattenfall has commissioned a SEK 2.5 million study for development of Näsudden III -- a 3 MW wind turbine with a rotor diameter of 80 metres. The machine must produce power at the same cost as 500 kW wind turbines currently on the market, insists Vattenfall. Kvaerner Turbin engineers Bengt Göransson and Anders Wickström say Näsudden III will be quite different from Näsudden II where the main shaft is integrated in the gearbox and the generator is placed at the top of the tower at a right angle. On Näsudden III all the components will be separated and lined up -- main shaft, gearbox, generator -- in a typically Danish standard layout. The rotor will have two wooden blades made by the Wind Energy Group of Britain instead of the expensive and lightweight carbon fibre blades used on Näsudden II. The designers say that use of standard components will bring down the price and assembly will be far simpler.
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