A monotube steam generator is a type of

steam generator A Steam generator is a device used to boil water to create steam. More specifically, it may refer to: *Boiler (steam generator), a closed vessel in which water is heated under pressure *Monotube steam generator *Supercritical steam generator or Ben ...

consisting of a single tube, usually in a multi-layer spiral, that forms a

once-through steam generator A heat recovery steam generator (''HRSG'') is an energy recovery heat exchanger that recovers heat from a hot gas stream, such as a combustion turbine or other waste gas stream. It produces steam that can be used in a process (cogeneration) or us ...

(OTSG). The first of these was the Herreshoff steam generator of 1873.

Principles

For the sake of efficiency, it is desirable to minimise the

steam Steam is a substance containing water in the gas phase, and sometimes also an aerosol of liquid water droplets, or air. This may occur due to evaporation or due to boiling, where heat is applied until water reaches the enthalpy of vaporization ...

content of the generator. Heat can then be transferred efficiently into liquid water, rather than into low-density steam. Monotube steam generators may either boil gradually along their length, usually pumped circulation systems, but where this boiling does not disrupt the circulation. Otherwise they can use the

Benson Benson may refer to: Animals *Benson (fish), largest common carp caught in Britain Places Geography Canada *Rural Municipality of Benson No. 35, Saskatchewan; rural municipality *Benson, Saskatchewan; hamlet United Kingdom * Benson, Oxfordshire ...

supercritical system, where the pressure is sufficient to prevent boiling (within the heated volume) altogether.

Examples

White steam car steam generator (Rankin Kennedy, Modern Engines, Vol III)

Examples of Monotube steam generators include: * Industrial

s * The water-tube boilers of the monotube type used in

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, such as: **

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Clayton Steam Generator Clayton may refer to: People *Clayton (name) *Clayton baronets *The Clayton Brothers, Jeff and John, jazz musicians *Clayton Brothers, Rob and Christian, painter artists *Justice Clayton (disambiguation), the judges Clayton Places Canada * Clayt ...

** Doble **

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.Locomobile Company of America The Locomobile Company of America was a pioneering American automobile manufacturer founded in 1899, and known for its dedication to precision before the assembly-line era. It was one of the earliest car manufacturers in the advent of the automo ...

White White is the lightest color and is achromatic (having no hue). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully reflect and scatter all the visible wavelengths of light. White on ...

, US patent 659,837 of 1900

Flash boilers

A flash boiler is a particular type of low-water-content monotube boiler. Modern use is confined to model steam boats but, historically, flash boilers were used in

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.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 ...

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, ...

* Steam generator (railroad)

References

Steam generators {{mech-engineering-stub