returns specific enthalpy for a given p and d
function specificEnthalpy_pd extends Modelica.Icons.Function; input AbsolutePressure p "Pressure"; input Density d "Density"; input FixedPhase phase = 0 "2 for two-phase, 1 for one-phase, 0 if not known"; output SpecificEnthalpy h "specific enthalpy"; end specificEnthalpy_pd;