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The energy needed to build a wind farm divided into the total output over its life, Energy Return on Energy Invested, of wind power varies, but averages about 20–25. [ 85 ] [ 86 ] Thus, the energy payback time is typically around a year.
Wind power is the use of wind energy to generate useful work. Historically, wind power was used by sails , windmills and windpumps , but today it is mostly used to generate electricity. This article deals only with wind power for electricity generation.
A wind turbine is a device that converts the kinetic energy of wind into electrical energy. As of 2020 [update] , hundreds of thousands of large turbines , in installations known as wind farms , were generating over 650 gigawatts of power, with 60 GW added each year. [ 1 ]
Wind power is now one of the main sources of renewable energy, and its use is growing rapidly, driven by innovation and falling prices. [98] Most of the installed capacity in wind power is onshore, but offshore wind power offers a large potential as wind speeds are typically higher and more constant away from the coast. [99]
Wind power in Russia – Russia has a long history of small-scale wind power use, but the country has not yet developed large-scale commercial wind energy production. Wind power in Scotland – wind power is Scotland's fastest growing renewable energy technology, with 2,574 MW of installed capacity as of April 2011. Wind power in Serbia
The United States, though, has very large offshore wind energy resources due to strong, consistent winds off the long U.S. coastline. [54] The 2011 NREL report, Large-Scale Offshore Wind Power in the United States, analyzes the current state of the offshore wind energy industry. According to the report, offshore wind resource development would ...
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The windmills at Kinderdijk in the village of Kinderdijk, Netherlands is a UNESCO World Heritage Site. A windmill is a structure that converts wind power into rotational energy using vanes called sails or blades, by tradition specifically to mill grain (), but in some parts of the English-speaking world, the term has also been extended to encompass windpumps, wind turbines, and other applications.