gas mixture of nitrogen, hydrogen and water vapor

[Marcus Schaedler]

Dear all,

 to be honest I'm an newcomer in the field of CoolProp and gas mixtures and want to get for example the values of molar fractions, heat capacities, viscosity, density, etc. for a defined gas mixture of mainly Hydrogen (varies between 90 to 50 % of hydrogen) and Nitrogen (varies between 10 to 50 % of Nitrogen) with water vapor (varies between 0 to 100 % reletive humidity). Is it possible to get these values out for different mixtures of these three components and how? 

I only found out, that HEOS will be used for it in coolprop, but at this page I can't see, that there is any validation of the parameters (Helmholtz, reducing parameters), that were used in the formulas by the tool.

http://www.coolprop.org/fluid_properties/Mixtures.html

Every hint will be helpful for using approximations of these perameters mentioned at the beginning for the usage in CFD simulations of ejectors for fuel cell applications.

Best regards,

Marcus

[Ian Bell]

You will need REFPROP for mixtures such as these. The algorithms in CoolProp are basically useless for super asymmetric mixtures like these. Even REFPROP will struggle.

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[Marcus Schaedler]

Dear Dr. Bell,

thanks for your answer. We will buy one license for the profossorship of advanced powertrains at TU Chemnitz this week and will compare the results with CoolProp.

Best Regards,

Marcus