"External combustion" redirects here. For the album, see External Combustion.
Type of reciprocating heat engine
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An external combustion engine (EC engine) is a reciprocating heat engine where a working fluid, contained internally, is heated by combustion in an external source, through the engine wall or a heat exchanger. The fluid then, by expanding and acting on the mechanism of the engine, produces motion and usable work.[1] The fluid is then dumped (open cycle), or cooled, compressed and reused (closed cycle).
In these types of engines, the combustion is primarily used as a heat source, and the engine can work equally well with other types of heat sources.
^external combustion - Definition from the Merriam-Webster Online Dictionary
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