Density derivative by specific enthalpy
function ddhp_props extends Modelica.Icons.Function; input SI.Pressure p "Pressure"; input SI.SpecificEnthalpy h "Specific enthalpy"; input Common.IF97BaseTwoPhase aux "Auxiliary record"; output SI.DerDensityByEnthalpy ddhp "Density derivative by specific enthalpy"; end ddhp_props;