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Quality coming out of the turbine

  1. Nov 14, 2006 #1
    Another question. If your given the quality coming out of the turbine.

    Why do you use say H2 = Hl + xv(Hv - Hl) to determine a xv even though u hav one given?
  2. jcsd
  3. Nov 14, 2006 #2


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    Staff Emeritus
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    Well in a saturated 2 phase state, the total enthalpy is determined by the enthalpy in the liquid fraction and the enthalpy in the vapor one.

    h = (1-x) hl + x hv = hl + x (hv - hl) where x is the thermodynamic quality.

    Normally in a turbine, the steam entering is superheated and becomes saturated as work is extracted (momentum transfered) from the working fluid to the rotor and stator blades.
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