The project, called Hywind,is the world's first largescale deepwater wind turbine(涡轮发电机).Although it uses a fairly standard 152ton,2.3megawatt
turbine,Hywind represents totally new technology. The turbine will be fixed 213 feet above the water on a floating spar(see picture),a technology Hywind's creator,the Norwegian company StatoilHydro,has developed recently. The steel spar, which is filled with stones and goes 328 feet below the sea surface, will be tied to the ocean floor by three cables(缆索);these will keep the spar stable and prevent the turbine from moving up and down in the waves.Hywind's stability(稳定性)in the cold and rough sea would prove that even the deepest corners of the ocean are suitable for wind power. If all goes according to plan, the turbine will start producing electricity six miles off the coast of southwestern Norway as early as September.
To produce electricity on a large scale, a commercial wind farm will have to use bigger turbines than Hywind does, but it's difficult enough to balance such a large turbine so high on a floating spar in the middle of the ocean. To make that turbine heavier, the whole spar's centre of gravity must be moved much closer to the ocean's surface. To do that, the company plans to design a new kind of wind turbine, one whose gearbox(变速箱) sits at sea level rather than behind the blades(see picture).
Hywind is a test run, but the benefits for perfecting floating windfarm technology could be extremely large. Out at sea, the wind is often stronger and steadier than close to shore, where all existing off shore windmills are planted. Deepsea farms are invisible from land, which helps overcome the windmillaseyesore objection. If the technology catches on, it will open up vast areas of the planet's surface to one of the best lowcarbon power sources available.
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