Herreshoff steam generator in a Peruvian torpedo boat of 1879
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.[1]
Principles
For the sake of efficiency, it is desirable to minimise the steam 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,[2] but where this boiling does not disrupt the circulation. Otherwise they can use the Benson supercritical system, where the pressure is sufficient to prevent boiling (within the heated volume) altogether.[3]
Examples
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White steam car steam generator
Examples of Monotube steam generators include:
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 steam cars.
See also
References
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^ Newest on Process Equipments (2012-11-25). "Boilers circulation systems: natural circulation and forced circulation". Enggcyclopedia. Retrieved 2012-12-02.
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^ http://www.babcock.com/library/pdf/br-1658.pdf
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^ Clayton Thermal Products UK - Steam Generators Principle of Operation
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^ http://whitesteamcar.com/White_Steam_Car_Registry/Patents_files/Steam%20Generator%20%28US%20Pat%20659837%29.pdf
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