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A water wheel in Erlangen, Germany The reversible water wheel powering a mine hoist in De re metallica (Georgius Agricola, 1566) The sound of the Otley waterwheel, at Manchester Museum of Science and Industry. A water wheel is a machine for converting the kinetic energy of flowing or falling water into useful forms of power, often in a watermill.
Typical efficiency of water wheels exploiting only the kinetic energy was around 30%. [1] These wheels are called stream water wheels, or kinetic water wheels. Instead, undershot water wheels are used in low head sites, like less than 1.5 m, and they also exploit the potential energy of the flow, with efficiencies of up to 84%.
Function (video) of the flatrod system in Sördalen, Sweden. The flatrod system dates to the period before the invention of the steam engine and electricity.Using flatrods it was possible to operate man engines and pumping systems, even though the water wheel in question had a rotary, not a reciprocal, motion.
Pelton patented his wheel as well as his novel design of the double cup runner, and in 1888 formed the Pelton Water Wheel Company in San Francisco to supply the growing demand for hydropower and hydroelectricity throughout the West and world-wide. [6] 'Pelton' is a trademark name for the products of that company, but the term is widely used ...
The norias of Hama on the Orontes River in Syria ().. A noria (Arabic: ناعورة, nā‘ūra, plural نواعير nawāʿīr, from Syriac: ܢܥܘܪܐ, nā‘orā, lit. "growler") is a hydropowered scoop wheel used to lift water into a small aqueduct, either for the purpose of irrigation or to supply water to cities and villages.
A tide mill is a water mill driven by tidal rise and fall. A dam with a sluice is created across a suitable tidal inlet, or a section of river estuary is made into a reservoir . As the tide comes in, it enters the mill pond through a one-way gate, and this gate closes automatically when the tide begins to fall.
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