function R134a_Helmholtz extends Modelica.Icons.Function; input Real delta "dimensionless density"; input Real tau "dimensionless temperature"; input Common.EOSResidualCoeff res "residual coefficient"; input Common.HelmholtzDerivs fid "ideal helmholtz coefficients"; output Common.HelmholtzDerivs f "helmholtz derivatives"; end R134a_Helmholtz;