Tuesday, 28 August 2012

steam engine

steam engine is a heat engine that performs mechanical work using steam as its working fluid. Water turns to steam in a boiler and reaches a high pressure. When expanded through pistons or turbines, mechanical work is done.The idea of using boiling water to produce mechanical motion has a very long history, going back about 2,000 years. Early devices were not practical power producers, but more advanced designs producing usable power have become a major source of mechanical power over the last 300 years, beginning with applications for removing water from mines using vacuum engines.
File:Rankine cycle layout.png
this is a diagram of how the steam engine works.

the idea of a steam engine started with the water wheel.The first steam engine was created by James Watt (1736-1819) James Watt was a Scottish inventor and mechanical engineer, born in Greenock, who was renowned for his improvements of the steam engine. In 1765, James Watt while working for the University of Glasgow was assigned the task of repairing a Newcomen engine, which was deemed inefficient but the best steam engine of its time. That started the inventor to work on several improvements to Newcomen's design.

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