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Pelton wheel, c 1900.

Pelton wheel, c 1900.
2 6 c m
actual image size: 32cm x 18cm


Model (scale 1:5). The Pelton wheel was designed by the American mining engineer Lester Pelton (1829-1908) and was often used to produce electricity in hydroelectric power stations. Water held in a reservoir above the turbine is released and enters the turbine through two nozzles. It hits hemispherical cups arranged round the circumference of a wheel, causing the wheel to turn. This model shows a Pelton wheel connected to a generator - a very effective arrangement giving 80% efficiency over a wide range of loads.

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© Science Museum / Science & Society Picture Library

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