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The biggest benefit of windmills is that they use a free source of energy to make more energy. As the wind blows, it turns the blades on the windmill, forcing the gears down below to react. Depending on what the windmill's specific purpose is, a windy day can provide a significant amount of energy for free.
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www.essortment.com/articles/windmill-power-work_871.htm
www.essortment.com/articles/windmill-power-work_871.htm
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A windmill is a machine which harnesses wind energy for a purpose like grinding grain, pumping water, or generating electricity. ... The axis connects to a system of gears to turn machinery which can do things like operate a millstone for the purpose of grinding grain, or pumping water.
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www.wisegeek.com/what-is-a-windmill.htm
www.wisegeek.com/what-is-a-windmill.htm
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The windmill was introduced into England in the 12th century - probably by Crusaders returning from the wars in the Holy Land. These early Mills were quite small and we can glimpse some of their details from mediaeval manuscripts, stained glass and carved representations.
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www.garfnet.org.uk/new_mill/autumn96/jv_mill.htm
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From this beginning the windmill spread steadily around the globe. ... areas in the United States in terms of windmill history. (Dennis, 58) ... The purpose of a windmill is to efficiently harness the kinetic energy in air...
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condor.wesleyan.edu/soconnell/wescourses/2003s/ees199/f...
condor.wesleyan.edu/soconnell/wescourses/2003s/ees199/finalprojects/windpower/McCrea-Windpower_199_2003.htm
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A windmill electric heater converts wind energy to heat energy. A windmill drives a rotor of an eddy current heater. Magnetic fields are provided at an air gap between the rotor and a stator of the eddy current heater.
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www.devileye.net/catalog/multi-purpose_lockout/windmill...
www.devileye.net/catalog/multi-purpose_lockout/windmill_driven_eddy_current_heater.html
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An extensive illustrated site about windmills, (especially in the UK). Includes mills for grinding, pumping, and electricity generation ... Windmill World logo...
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www.windmillworld.com/
www.windmillworld.com/
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History and development of windmills, especially in England ... Quite where and when these two came together in the first windmill is unknown, but a likely scenario suggests a Persian origin, from where (tradition has it) the knowledge spread back into Northern Europe as a result of the Crusades.
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www.windmillworld.com/windmills/history.htm
www.windmillworld.com/windmills/history.htm
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Water Pumping Windmill Businesses in the United States. A comprehensive renewable energy buyers guide and business directory to more than 15,000 renewable energy businesses worldwide. ... Water Pumping Windmill Businesses in the United States by State...
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energy.sourceguides.com/businesses/byGeo/US/byP/water/w...
energy.sourceguides.com/businesses/byGeo/US/byP/water/wPumpMills/wPumpMills.shtml
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To pump water out of low lying areas that would be flooded otherwise.
http://wiki.answers.com/Q/What_is_the_Purpose_of_dutch_...
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