To process this page used the WaterSteamPro function "wspJOULETHOMPSONSTX": joule-Thomson coefficient in double-phase area [K/Pa] as function of temperature t [K], vapor fraction x [-].
Function calculate the Joule-Thomson coefficient in double-phase area by equation at saturation line: JT = (dT/dP)h. Until version 5.6 the function used wspJOULETHOMPSONSST and wspJOULETHOMPSONSWT and returned value from following formula: JTx = (1 - X)·JOULETHOMPSONw + X·JOULETHOMPSONs, where JOULETHOMPSONs = wspJOULETHOMPSONSST, JOULETHOMPSONw = wspJOULETHOMPSONSWT and X - vapor vapor fraction that did not conform to definition of Joule-Thomson coefficient. Now it calculates correctly. The range of validity is double-phase (water-vapor) area.
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Copyright (c) MPEI (TU), 1999-2010.
Copyright (c) Konstantin A. Orlov, 1999-2010.