Wind turbine

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windmill, apparatus that harnesses wind power for a variety of uses, e.g., pumping water, grinding corn, driving small sawmills, and driving electrical generators. Windmills were probably not known in Europe before the 12th cent., but thereafter they became familiar landmarks in Holland, England, France, and Germany. The typical Dutch windmill, also called the tower type, has a huge tower of stone, brick, or wood, in contrast to the German, or post, mill, the distinctive feature of which is that the whole building revolves on a central post. At the top of either type there is a revolving apparatus to which four to six arms are attached. The arms, usually 20 to 40 ft (6–12 m) long, bear sails constructed of light wood, or of canvas attached to a frame. A small fan serves as a rudder to keep the wheel facing the wind.

More modern American windmills have high towers of light steel girders; at the top is a wheel with many sheet-metal concave and “warped” vanes (sails) about 4 ft (1.2 m) long. The wheel is kept automatically facing the wind by a broad tail geared to a shaft. They have been widely used for pumping water in rural parts of the United States. Such windmills can also be used to generate about one kilowatt of elecricity.

Larger windmills, such as the modern propellerlike wind turbines, can have rotors (the blade assembly) that span 200 ft (60 m) or more. These wind turbines, often joined together in wind farms, can produce 1.5 MW or more of electricity and can serve as a significant source of electric energy in plains. coastal areas (including offshore locations, either on supports rising from the seafloor or on floating platforms anchored to the seafloor), and elsewhere. Wind turbines have been most extensively used in Europe, where Denmark, for example, is undertaking to generate 50% of its electricty using wind power by 2030. By 2018, wind turbines represented 18% of the installed energy generating capacity in the European Union, and provided 14% of the electricity demand. Thousands of small wind turbines are used in Inner Mongolia to provide local electric power to nomadic people.

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Wind turbine

A device that converts the kinetic energy of the wind into mechanical energy that can be used to drive equipment such as pumps. The addition of a generator allows the wind’s kinetic energy to be converted into electricity. There are two types of wind turbines: horizontal axis turbines, with blades that rotate about a horizontal axis, and vertical axis turbines, with blades rotate about a vertical axis.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

wind turbine

[′win ′tər‚bīn]
An advanced type of windmill designed to convert wind energy into electrical energy.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The global players in the wind turbines market include Vestas, Goldwind, Suzlon, Guodian United Power, Sinovel, Gamesa, General Electric, Siemens, DHI DCW Group, Global Castings, Ningo Riyue, Wind Power, Seforge, Eisengiesserei Torgelow GmbH and Patel Alloys.
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