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I would like to change the EoS used by REFPROP to the PR EoS for several calculations.

It's stated that the Flags function must be used.

"

Peng-Robinson or PR 0: Turn off the Peng-Robinson equation of state (default). 2: Use Peng-Robinson equation for all calculations. 3: Use Peng-Robinson with translation term deactivated. This option is never reset.

"

I guess I have to use Flags["PR", 3] However, I'm unsure where to place/call it within the typical Refprop[] function.

T = 290 K;
P = 2036 kPa;
RefProp["CO2", "TP", "H", T, P]

Also, I get an error when I try the Flags function examples:

Flags["Dir search", -999]

NET::methodargs: Improper arguments supplied for method named FLAGSdll.

Could someone guide me on how to use the Flags function to switch the EoS to the PR EoS and also where to place or call the Flags function?

Thank you.

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  • $\begingroup$ Link to documentation for the stated software is here. $\endgroup$
    – Syed
    Commented Dec 13, 2022 at 10:07
  • $\begingroup$ Welcome to the Mathematica Stack Exchange. I initially suggested that this question could be answered on the Chemistry SE due to my ignorance of the Chemistry features in Mathematica. Please wait for an answer. Regards. $\endgroup$
    – Syed
    Commented Dec 13, 2022 at 11:51

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