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Parsons' radial flow steam turbine-generator, 1891.

Parsons' radial flow steam turbine-generator, 1891.
3 1 c m
actual image size: 32cm x 23cm


Until the invention of the steam turbine by Charles Parsons (1854-1931) in 1884, steam engines could not turn fast enough to produce electricity efficiently on a large scale. Used at the Cambridge Electric Light Station, this radial flow turbine-generator was the first to prove that turbines could be run as economically as the best steam engines. It used the energy of high-presure steam at 200 degrees centigrade to run the turbine. Turning at 4,800 revolutions per minute, it had a power output of 100 kilowatts a second and operated for 30 years. Steam turbines still drive most generators today.

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© Science Museum / Science & Society Picture Library

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