Function to calculate some extra thermophysical properties in regions 1, 2, 3 and 5 as f(p,T)
function extraDerivs_pT extends Modelica.Icons.Function; input SI.Pressure p "Pressure"; input SI.Temperature T "Temperature"; output Modelica.Media.Common.ExtraDerivatives dpro "Thermodynamic property collection"; end extraDerivs_pT;