To process this page used the WaterSteamPro function "wspXPH": vapor fraction [-] as function of pressure p [Pa], specific enthalpy h [J/kg].
It is a function. The range of the validity is within that described in IF-97. The IF-97 region is determined for given p and h (by function wspWATERSTATEAREAPH). If the region is double-phase the sought parameter is calculated. Since at some stages the function use iterations, to speed up calculations you may disable precision mode (functions wspGETTOLERANCEMODE and wspSETTOLERANCEMODE) or vary relative precision for internal iterations (functions wspGETTOLERANCE and wspSETTOLERANCE).
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.