AndreaVIC

Thank you MadsFoged! It works perfectly! Andrea

Probably there is the same problem also here: my_fluid.UpdatePS(Pressure.FromBars(9), UnitsNet.Entropy.FromJoulesPerKelvin(1699.7)); Could you fix the issue? Thanks again Andrea

Thanks for the suggestion. It is probably more time-consuming procedure but it could work. Before moving to Refprop I am going to follow this approach and if you are interested...

Thanks, the new string for R513A works for me. Following my custom UpdatePS function: private void My_UpdatePS(ref Fluid my_fluid,double my_Entropy, double ref_Pressure) { // my_Entropy: J/(kg*K) // ref_Pressure: Pa double...