книги Наука, техника, медицина Техника ГОСТы, стандарты

Expansion valve (steam engine)

Код 3290349

  • ISBN: 978-5-5145-2919-3

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Аннотация к книге "Expansion valve (steam engine)"

High Quality Content by WIKIPEDIA articles! An expansion valve is a device in steam engine valve gear that improves engine efficiency. It operates by closing off the supply of steam early, before the piston has travelled through its full stroke. This cut-off allows the steam to then expand within the cylinder. This expanding steam is still sufficient to drive the piston, even though its pressure decreases as it expands. As less steam is supplied in the shorter time for which the valve is open, use of the expansion valve reduces the steam consumed and thus the fuel required. The engine (on 1875 figures) may deliver two-thirds of the work, for only one-third of the steam.

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ISBN: 978-5-5145-2919-3

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