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A convection superheater is located in the convective zone of the furnace, in the path of the hot flue gases, usually ahead of an economizer. A convection superheater is also called a primary superheater. A separately fired superheater is a superheater that is placed outside the main boiler and has its own separate combustion system.
Superheater Provides additional heat – as much as 300 °F (167 °C) hotter – to steam that has been generated in the boiler by sending it back through superheat tubes located in the boiler tubes (28), thus increasing engine efficiency and power. [2] [8] [3]: 78 See also Superheater tubes (30). Smokestack (US+) Chimney, Funnel (UK+)
A smokebox is one of the major basic parts of a steam locomotive exhaust system. Smoke and hot gases pass from the firebox through tubes where they pass heat to the surrounding water in the boiler. The smoke then enters the smokebox, and is exhausted to the atmosphere through the chimney (or funnel). Early locomotives had no smokebox and relied ...
While this limited the capacity of the locomotive's boiler, the locomotive itself had a higher power, due to the presence of the superheater. Some superheater-fitted engines did not perform as well as was expected, entirely due to a misunderstanding of the needs of a superheated engine [5] By the mid-1920s, designers understood that ...
On leaving the superheater, the steam exits the dry header of the superheater and passes down a steam pipe, entering the steam chests adjacent to the cylinders of a reciprocating engine. Inside each steam chest is a sliding valve that distributes the steam via ports that connect the steam chest to the ends of the cylinder space.
The square cover beneath is another distinctive LNER feature, covering the end of the superheater header. A snifting valve (sometimes snifter valve) is an automatic anti-vacuum valve used in a steam locomotive when coasting. The word Snift imitates the sound made by the valve.
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The Locomotive Superheater Company was founded in 1910 to further the use of superheated steam in locomotives. The Superheater Company's primary manufacturing facility was located in East Chicago, Indiana. In December 1948 stockholders approved a merger between the Combustion Engineering Company and Superheater Company.
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