Specific isochoric heat capacity in double-phase area

To process this page used the WaterSteamPro function "wspCVSTX": specific isochoric heat capacity in double-phase area [J/(kg·K)] as function of temperature t [K], vapor fraction x [-].

Function uses functions wspCVDPSST and wspCVDPSWT which return specific heat capacities at constant volume (Cv) of steam and water at saturation line in the double-phase region area. The function uses following formula: CVx = (1 - X)·CVDPw + X·CVDPs, where CVDPs = wspCVDPSST, CVDPw = wspCVDPSWT and X - vapor fraction. This function used functions wspCVSST and wspCVSWT until version 5.6 which is not conform to thermodynamic, because it neglects the jump of properties at saturation line. The range of validity is double-phase (water-vapor) area.

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