Values obtained for T above maximum for model

[Matt Yates]

What does CoolProp do when you ask it to calculate state properties outside the T range of the model?  For example the propane model:

https://coolprop.org/fluid_properties/fluids/n-Propane.html

says the maximum temperature is 650 K.  However, nothing in CoolProp stops me from calculating values well above that temperature.  Should I just assume calculated values above 650 K are meaningless?

I have been working on calculating enthalpy and Gibbs energy of chemical reactions.  I posted code on github to answer this issue:

https://github.com/CoolProp/CoolProp/issues/1360

It would be very useful for chemical reactions if higher T values outside the model limits could be used.  If CoolProp cannot be used above the T limit of each model, it would require switching to a different model (like ideal gas with a polynomial fit of Cp or an empirical correlation) when the T limit of the CoolProp model is reached.

-Matt Yates

[Ian Bell]

There are flags to skip the checks, but for consistency with REFPROP, you are permitted to evaluate up to 1.5*Tmax. The model is extrapolated, which may or may not be reasonable depending on the model, and caveat emptor

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