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Diagram of a steam locomotive. Superheater is #10.

Etymology edit

superheat +‎ -er

Noun edit

superheater (plural superheaters)

  1. A component of a boiler system that heats the steam above its saturation temperature to prevent it condensing, and in the case of a steam engine to improve its efficiency.
    • 1944 November and December, Lord Monkswell, “The French Four-Cylinder Compound Engine”, in Railway Magazine, page 326:
      In addition to all this, the fluidity of the steam itself was much increased by high superheat, usually achieved by means of the Houlet superheater. [] When the engine is working hard, the temperature of the steam is usually raised by the superheater to about 750° F.

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