Triple-expansion engine | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-07-07

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Compound_steam_engine


00:00:45 1 Compound systems
00:02:46 1.1 Compounding engines
00:06:36 1.2 Multiple-expansion engines
00:07:35 2 History
00:07:44 2.1 Early work
00:08:30 2.2 Double-expansion
00:09:56 2.3 Multiple-expansion
00:11:16 3 Applications
00:11:25 3.1 Pumping engines
00:11:35 3.2 Mill engines
00:13:00 3.3 Marine applications
00:15:25 3.4 Application to railway locomotives
00:17:29 4 Notes
00:18:51 5 See also



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SUMMARY
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A compound steam engine unit is a type of steam engine where steam is expanded in two or more stages.
A typical arrangement for a compound engine is that the steam is first expanded in a high-pressure (HP) cylinder, then having given up heat and losing pressure, it exhausts directly into one or more larger-volume low-pressure (LP) cylinders. Multiple-expansion engines employ additional cylinders, of progressively lower pressure, to extract further energy from the steam.Invented in 1781, this technique was first employed on a Cornish beam engine in 1804. Around 1850, compound engines were first introduced into Lancashire textile mills.