steam engine summary

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Below is the article summary. For the full article, see steam engine.

steam engine, Machine that uses steam power to perform mechanical work through the agency of heat (hence a prime mover). In a steam engine, hot steam, usually supplied by a boiler, expands under pressure, and part of the heat energy is converted into work. The rest of the heat may be allowed to escape, or, for maximum engine efficiency, the steam may be condensed in a separate apparatus, a condenser, at comparatively low temperature and pressure. For high efficiency, the steam must decrease substantially in temperature as it expands within the engine. The most efficient performance (i.e., the greatest output of work in relation to the heat supplied) is obtained by using a low condenser temperature and a high boiler pressure. See also Thomas Newcomen, James Watt.

George Stephenson Summary

George Stephenson was an English engineer and principal inventor of the railroad locomotive. Stephenson was the son of a mechanic who operated a Newcomen atmospheric-steam engine that was used to pump out a coal mine at Newcastle upon Tyne. The boy went to work at an early age and without formal

James Watt on the steam engine Summary

Among the pleasures to be derived from venturing through the early editions of Britannica is the one we think of as “being present at the creation.” Steam engines had been around as novelties for centuries, but the first practical ones were invented by the Englishmen Thomas Savery in 1698 and

Richard Trevithick, detail of an oil painting by John Linnell, 1816; in the Science Museum, London.

Richard Trevithick Summary

Richard Trevithick British mechanical engineer and inventor who successfully harnessed high-pressure steam and constructed the world’s first steam railway locomotive (1803). In 1805 he adapted his high-pressure engine to driving an iron-rolling mill and to propelling a barge with the aid of paddle

Oliver Evans Summary

Oliver Evans was an American inventor who pioneered the high-pressure steam engine (U.S. patent, 1790) and created the first continuous production line (1784). Evans was apprenticed to a wheelwright at the age of 16. Observing the trick of a blacksmith’s boy who used the propellant force of steam