| 释义 |
ˈsuperheat, v.
[f. super- 9 b + heat v.]
trans. To heat to a very high temperature; esp. to raise the normal temperature of (steam); more widely, to heat (a substance) above the temperature of a phase transition without the change of phase occurring.
1859Times 23 Apr. 10/4 The various proposed methods of superheating steam. 1861Leeds Mercury 2 Nov., It is found most advantageous to superheat the steam to about 100 degrees above the temperature of plain steam. 1869Amer. Jrnl. Sci. XCVII. 12 To subject the oils to a temperature above their boiling points, or in other words, to super-heat their vapors. 1875Knight Dict. Mech. 2333/1 Steam-chimney, an annular chamber around the chimney of a boiler-furnace for superheating steam. 1939Carpenter & Robertson Metals II. xiv. 1194 Marked changes in the structure of cast iron could be produced by superheating the melt, i.e. heating to a temperature considerably higher than that required to melt the metal.
Hence ˈsuperheat n., the state of being superheated; the excess of temperature of a vapour above its temperature of saturation.
1884Methodist Mag. 787 Solubility is increased by heat, superheat, and pressure. 1903Engineering Mag. Feb. 756 A superheat of 100° F., or 55° C. |