water wheel

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water wheel,

device for utilizing the power of flowing or falling water. The Norse wheel is the oldest type known. Despite its name it probably originated in the Middle East, where the swift stream required by this type of wheel is common. The Norse wheel has a vertical shaft directly connected at the top to a millstone; the lower end of the shaft, with vanes or paddles attached, dips into the flowing stream. In the 1st cent. B.C. a horizontal shaft came into use; the wheel attached to it had radial vanes around its edge. Among the early forms of this wheel are the overshot wheel, used where water falls from a height, striking the vanes from above; the breast wheel, employed where the height of the water is less than the height of the wheel so that the water strikes the wheel about midway; and the undershot wheel, usable where the water flows more or less on a level but with a swift current and strikes the vanes on the under part of the wheel. One of the first uses of the steam engine was to drive a pump that raised water into a millpond whose spillway drove a water wheel. Today the water wheel has been largely replaced by the turbineturbine,
rotary engine that uses a continuous stream of fluid (gas or liquid) to turn a shaft that can drive machinery.

A water, or hydraulic, turbine is used to drive electric generators in hydroelectric power stations.
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. See hydraulic machinehydraulic machine,
machine that derives its power from the motion or pressure of water or some other liquid. Hydraulic Engines

Water falling from one level to a lower one is used to drive machines like the water wheel and the turbine.
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water wheel

1. a simple water-driven turbine consisting of a wheel having vanes set axially across its rim, used to drive machinery
2. a wheel with buckets attached to its rim for raising water from a stream, pond, etc.
References in periodicals archive ?
The technology for producing electricity from a water wheel is the same as producing it from a windmill, but, as we can count on the streams and rivers flowing which we can't for the wind blowing, they are more cost effective.
The hotel garden includes streams, pathways, bridges - and a working water wheel, above.
The water wheels, part of an old Cistercian Abbey founded in 1184, are a huge tourist attraction.
They reckon the water wheels must be 200-250 years old,' says Hayward, who lives just a short distance from the forge.
One of the water wheels already powers a generator which supplies heat and light and we are currently fund-raising to restore the other wheel.
Eventually, the children in this project begin to build water wheels to test in a water basin.
The product segments analyzed in the data reports include: Hydraulic turbines and water wheels (power less than 1000 kW) Hydraulic turbines and water wheels (power 1000-10000 kW) Hydraulic turbines and water wheels (power more than 10000 kW) Parts of hydraulic turbines and water wheels
The large-scale development of water wheels would depend upon numerous planning and logistical issues.
These include water wheels, underwater turbines and so on.
In this valley there were over 30 woollen mills that were, in Victorian times, powered by water wheels.
It's grassroots stuff, of course, and listening to Dibnah wax lyrical about James Brindley's water wheels and the Newcomen steam engine has a similar appeal to spending a couple of hours visiting the Black Country Museum and getting in touch with your industrial roots.
Currently, parts of hydraulic turbines and water wheels account for 79.