Density derivative by specific enthalpy
function ddhp extends Modelica.Icons.Function; input Modelica.SIunits.Pressure p "Pressure"; input Modelica.SIunits.SpecificEnthalpy h "Specific enthalpy"; output Modelica.SIunits.DerDensityByEnthalpy ddhp "Density derivative by specific enthalpy"; end ddhp;