It is a windmill. It is used for pumping water from different places. Like fresh water from wells or for giving water to the lower areas. Windpumps are still used where they can not use electric power or if the area can not afford money.
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A windmill (wind pump) is a structure or machine that converts wind into usable energy through the rotation of a wheel made up of adjustable blades. (How Products are Made) For the source and more detailed information concerning your request, click on the related links section (Answers.com) indicated at the bottom of this answer box.
A typical wind pump has between 3 to 5 blades. The number of blades can vary depending on the design and purpose of the wind pump.
Wind turbines
using wind to drive a water pump using wind to drive a generator using knowledge of fluid dynamics to make wind power more efficient
None. A windmill is turned BY the wind, and can do work like generate electricity or operate a pump for raising water out of a well.
Windmills!
Wind energy is made by spinning turbines. The wind spins the wind turbines and they generate energy.
A windmill was a structure that used wind to power a mill (or sometimes to pump water), and a wind turbine is a structure that uses wind to create electrical power.
The normal use of a wind turbine is to generate electricity or to pump water. It could be used to measure wind speed but there are very inexpensive devices that do the job better.
Wind energy is formed from the force of the wind on a propellar.
Wind energy
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