Are gas properties for common gasses (i.e. oxygen, nitrogen, CO2) defined anywhere for use in Simscape?

I'm trying to use the Moist Air component library to model a mixed gas system and need to populate the Moist Air Properties block with different gas properties for the 'Dry Air' and 'Trace Gas'. If there are pre-existing gas properties that can be used to populate these fields, I'd prefer to use those instead of defining them myself.

Answer 1

[Yifeng Tang]

REFPROP and CoolProp will be the best path forward. I'm not aware of such a library in Simscape.

If you are working with N2, O2, H2O, H2, CO2, there are shipping examples that contain the properties for these. But I don't think I've seen anything else.

[Thomas]

Any idea if this is a planned area of expansion for SimScape? The lack of native tools to easily model changing gas mixtures makes modeling my full system impractical.

[Ryan]

I would also appreciate this functionality... say a dropdown menu for common gasses with default properties for that gas within the simscape gas properties block.

[Yifeng Tang]

@Thomas are you talking about a gas mixture, instead of a single gas species? Check out this custom Simscape domain and see if it works for you want to do: https://www.mathworks.com/matlabcentral/fileexchange/180844-gas-mixture-domain

[Thomas]

@Yifeng Tang, that might be useful. I downloaded that toolbox and will give it a try. For my application, the gasses are stored in separate tanks and are mixed together in a common volume after a variety of valves and regulators. As a result, I'm using single gasses and a mixture.