Return isentropic enthalpy
function isentropicEnthalpy extends Modelica.Icons.Function; input AbsolutePressure p_downstream "downstream pressure"; input ThermodynamicState refState "reference state for entropy"; input Boolean exact = false "flag wether exact or approximate version should be used"; output SpecificEnthalpy h_is "Isentropic enthalpy"; end isentropicEnthalpy;