returns specific entropy for a given p and h
function specificEntropy_ph extends Modelica.Icons.Function; input AbsolutePressure p "Pressure"; input SpecificEnthalpy h "Specific Enthalpy"; input FixedPhase phase = 0 "2 for two-phase, 1 for one-phase, 0 if not known"; output SpecificEntropy s "Specific Entropy"; end specificEntropy_ph;