specific enthalpy as function or pressure and temperature
function h_props_ps extends Modelica.Icons.Function; input Units.SI.Pressure p "pressure"; input Units.SI.SpecificEntropy s "specific entropy"; input ThermoSysPro.Properties.WaterSteam.Common.IF97BaseTwoPhase aux "auxiliary record"; output Units.SI.SpecificEnthalpy h "specific enthalpy"; end h_props_ps;