wind power
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The wind turbine is the modern counterpart of the windmill. The rotor blades are huge – up to 100 m/330 ft across – in order to extract as much energy as possible from the wind. Inside the turbine head, gears are used to increase the speed of the turning shaft so that the electricity generation is as efficient as possible.
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Wind turbines at the Delabole Wind Farm, in Cornwall, the first wind farm in the United Kingdom. Its ten turbines have a total generating capacity of 4 megawatts. There are now six wind farms in the county of Cornwall, with a combined total output of more than 31 megawatts of electricity, enough to meet the annual needs of 19,500 homes.
Power produced from the harnessing of wind energy. The wind has long been used as a source of energy: sailing ships and windmills are ancient inventions. After the energy crisis of the 1970s wind turbines began to be used to produce electricity on a large scale.
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