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Wind energy penetration is the fraction of energy produced by wind compared with the total generation. Wind power's share of worldwide electricity usage in 2021 was almost 7%, [ 55 ] up from 3.5% in 2015.
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 ]
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 ...
Wind energy generates almost 10% of U.S. electricity and in a land of endless plains that appears likely to increase. Unlike some emerging technologies, wind energy is also a relatively mature ...
Wind-energy advocates contend that less than 1% of the land is used for foundations and access roads, the other 99% can still be used for farming. [12] A wind turbine needs about 200–400 m 2 for the foundation. With the increasing size of the wind turbine the relative size of the foundation decreases. [93]
In Denmark, wind energy met more than 40% of its electricity demand while Ireland, Portugal and Spain each met nearly 20%. [82] Globally, the long-term technical potential of wind energy is believed to be five times total current global energy production, or 40 times current electricity demand, assuming all practical barriers needed were overcome.
The Energy Department has tallied nearly $6 billion of investments to develop offshore wind over the last few years, including in 17 manufacturing sites and at 15 ports.
Wind power is considered a sustainable, renewable energy source, and has a much smaller impact on the environment compared to burning fossil fuels. Wind power is variable, so it needs energy storage or other dispatchable generation energy sources to attain a reliable supply of electricity. Land-based (onshore) wind farms have a greater visual ...
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