Derivative of vapor density in two-phase region w.r.t pressure
function dDewDensity_dPressure_der_sat extends Modelica.Icons.Function; input SaturationProperties sat "saturation properties | pressure is used for interpolation"; input SaturationProperties der_sat "derivative of saturation properties"; output Real ddvdp "derivative of vapor density in two-phase region w.r.t pressure"; end dDewDensity_dPressure_der_sat;