To process this page used the WaterSteamPro function "wspXSTU": vapor fraction [-] as function of temperature t [K], specific internal energy u [J/kg].
This function uses formula: X = (U - Uw)/(Us - Uw), where Uw = wspUSWT, Us = wspUSST. The range of validity is double-phase (water-vapor) area.
WaterSteamPro is a registered trademark of Moscow Power Engineering Institute (Technical University).
Copyright (c) MPEI (TU), 1999-2010.
Copyright (c) Konstantin A. Orlov, 1999-2010.