Melting point of H2O-MEG mixtures

[emmett-b]

Hello there,

It seems the README.md "Authors and contact person" section is missing so I thought it might be ok to ask here.

I'd like to know if thermopack could be a way to model Water-MEG mixtures, particularly for the bubble point and the melting point of the mixture. I've tried a few things, but it seems there's currently no H2O melting correlations in solid_correlation_datadb.f90. Is there another way to model the melting point of Water-MEG mixtures with thermopack?

Thanks!

[morteham]

Hi,

It is not a system we have spent a lot of time modelling, but several models can be used to study this system. For example the CPA model will do a decent job to describe the Water-MEG system and ist bubble points.

The melting correlations are only meant for pure fluids, and will not be able to handle freezing point depression etc. However the, Feistel and Wagner model can be initialised using the init_solid("H2O") method. Using these models you can calculate a melting point for a Water-MEG mixture, for example by comparing the chemical potential of water in the fluid phase with the Gibbs energy of the solid model. How well this fits with experiments I don't know.

Regards,
Morten

[vegardjervell]

I'm moving this thread to discussions, as it is not strictly related to an issue with ThermoPack.