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A flash boiler is a type of
A flash boiler is a type of water-tube boiler
A high pressure watertube boiler (also spelled water-tube and water tube) is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which boils water in the steam-gen ...
. The tubes are close together and water is pumped through them. A flash boiler differs from the type of monotube steam generator in which the tube is permanently filled with water. In a flash boiler, the tube is
kept so hot that the water feed is quickly flashed into steam and superheated
A superheater is a device used to convert saturated steam or wet steam into superheated steam or dry steam. Superheated steam is used in steam turbines for electricity generation, steam engines, and in processes such as steam reforming. There are ...
. Flash boilers had some use in automobile
A car or automobile is a motor vehicle with wheels. Most definitions of ''cars'' say that they run primarily on roads, seat one to eight people, have four wheels, and mainly transport people instead of goods.
The year 1886 is regarde ...
s in the 19th century and this use continued into the early 20th century.
History
There is disagreement about the exact definition of a flash boiler. Some writers use the term interchangeably withmonotube boiler
A monotube steam generator is a type of steam generator consisting of a single tube, usually in a multi-layer spiral, that forms a once-through steam generator (OTSG). The first of these was the Herreshoff steam generator of 1873.
Principles
F ...
and there is even use of the term ''semi-flash boiler''. However, the flash boiler is generally attributed to Léon Serpollet
Léon Serpollet (4 October 1858 – 1 February 1907) was a French engineer and developer of flash steam boilers and steam automobiles.
Léon Serpollet was born in Culoz, in the Ain department of France in 1859, son of the carpenter August ...
who used a flash boiler in the Gardner-Serpollet
Gardner-Serpollet was a French manufacturer of steam-powered cars in the early 20th century. Léon Serpollet is credited with inventing and perfecting the flash boiler in the late 1800s.steam car
A steam car is a car (automobile) propelled by a steam engine. A steam engine is an external combustion engine (ECE) in which the fuel is combusted outside of the engine, unlike an internal combustion engine (ICE) in which fuel is combusted ins ...
s, where rapid steam-raising was an advantage. During the Second World War they were used in Royal Navy Steam Gun Boats (SBGs). Modern use is largely confined to model steam boats.
See also
* Du Temple Monoplane *List of boiler types, by manufacturer
There have been a vast number of designs of steam boiler, particularly towards the end of the 19th century when the technology was evolving rapidly. A great many of these took the names of their originators or primary manufacturers, rather than a m ...
* Monotube steam generator
* Pop-pop boat
* Steam generator (boiler)
A steam generator is a form of low water-content boiler, similar to a flash steam boiler. The usual construction is as a spiral coil of water-tube, arranged as a single, or monotube, coil. Circulation is once-through and pumped under pressure, ...
References
Bibliography
* * Boilers Steam generators {{mech-engineering-stub