Definition of superheat in English:

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Pronunciation: /ˌso͞opərˈhēt/


[with object]
1Heat (a liquid) under pressure above its boiling point without vaporization.
Example sentences
  • Water below the surface is not directly exposed to the atmosphere and can remain a liquid as it superheats above this temperature.
  • The nonstop operation also tends to superheat oil used in equipment, breaking down its viscosity.
1.1Heat (a vapor) above its temperature of saturation.
Example sentences
  • It is common ground that superheating of the fuel gas was necessary.
  • For decades, steelmakers have used highly polluting ovens to turn powdery coal and iron ore into chunks called coke and sinter, which are melted with superheated air to make iron.
  • They processed starch and an oil, such as soy oil, together in superheated steam under pressure and noted the unusual nature of a gel that came out of the jet cooker.
1.2Heat to a very high temperature.


The excess of temperature of a vapor above its temperature of saturation.
Example sentences
  • Mold conditions, pouring rate, and other process variables being equal, the fluidity of commercial gray irons depends primarily on the amount of superheat above the freezing temperature (liquidus).
  • More importantly, propane will vaporize and absorb superheat at low ambient temperatures - not possible with water.
  • The gas from the two dedicated Zechstein wells is currently of sufficiently high pressure to drive the turbine. A fuel gas heater is being used to supply superheat to the gas.



Pronunciation: /ˈso͞opərˌhēdər/
Example sentences
  • Firstly, they were in regular service for 20 years with nothing more drastic than the provision of standard boilers and superheaters.
  • Larger superheaters and eventually double chimneys were aids to improved performance over the years.
  • At a convenient high point above the water level is the regulator valve, which admits steam to a main steam pipe carrying it forward to the smokebox and then through the superheater, and so to the cylinders.
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