Superheated steam

Superheated steam

Superheated steam is steam at a temperature higher than its saturation temperature. If saturated steam is heated at constant pressure, its temperature will rise, producing superheated steam. This may occur in a boiler/autoclave if saturated steam is exposed to a surface with a higher temperature such as a boiler wall.

The steam is then described as superheated by the number of temperature degrees through which it has been heated above saturation temperature.

Superheated steam and liquid water cannot coexist under thermodynamic equilibrium, as any additional heat simply evaporates more water and the steam will become saturated steam. However, under dynamic conditions some degree of superheating is often possible.

Superheated steam is not suitable for sterilization.

Superheated steam is used in steam locomotives to improve efficiency and is generated using a superheater.


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  • superheated steam —       water vapour at a temperature higher than the boiling point of water at a particular pressure. For example, at normal atmospheric pressure, superheated steam has a temperature above 100 °C (212 °F). Use of superheated steam permits more… …   Universalium

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  • superheated steam — perkaitintasis garas statusas T sritis Energetika apibrėžtis Garas, kurio temperatūra aukštesnė už sauso sočiojo garo temperatūrą esant tam pačiam slėgiui. atitikmenys: angl. superheated steam vok. überhitzter Dampf, m rus. перегретый пар, m… …   Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas

  • Steam — (st[=e]m), n. [OE. stem, steem, vapor, flame, AS. ste[ a]m vapor, smoke, odor; akin to D. stoom steam, perhaps originally, a pillar, or something rising like a pillar; cf. Gr. sty ein to erect, sty^los a pillar, and E. stand.] 1. The elastic, a[… …   The Collaborative International Dictionary of English

  • Steam blower — Steam Steam (st[=e]m), n. [OE. stem, steem, vapor, flame, AS. ste[ a]m vapor, smoke, odor; akin to D. stoom steam, perhaps originally, a pillar, or something rising like a pillar; cf. Gr. sty ein to erect, sty^los a pillar, and E. stand.] 1. The… …   The Collaborative International Dictionary of English

  • Steam boiler — Steam Steam (st[=e]m), n. [OE. stem, steem, vapor, flame, AS. ste[ a]m vapor, smoke, odor; akin to D. stoom steam, perhaps originally, a pillar, or something rising like a pillar; cf. Gr. sty ein to erect, sty^los a pillar, and E. stand.] 1. The… …   The Collaborative International Dictionary of English

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