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usnistgov / REFPROP-issues

A repository solely used for reporting issues with NIST REFPROP
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Plot > T-x Diagram and P-x Diagram always in mole fraction #674

Open ThukeS opened 1 month ago

ThukeS commented 1 month ago

When either mole or mass basis is chosen in Options > Units > Composition, plots rendered in Plot > T-x Diagram or P-x Diagram are always in mole fraction, however, the x-axis label will reflect the choice. So when mass fraction is chosen, the display is in spurious.

The attached image shows this for the arbitrarily chosen binary R-134a / Propane. The python plots are what I would expect to be rendered.

image mole_v_mass_frac_REFPROP-TPxy

ianhbell commented 1 month ago

Yes, this a known bug in the GUI; the plots are always on a molar basis.