Newbie seeking help: How can I determine the supercritical gas-liquid phase ratio of LNG?
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In the supercritical state, Hysys assigns vapor fractions of only 0 and 1; is there any other way to determine the vapor fraction of LNG in the supercritical state?
Check the definition of the supercritical state: it is a state that is neither gas nor liquid, but rather a state where gas and liquid coexist. Therefore—form is emptiness, and emptiness is form; gas is liquid, and liquid is gas. In such a state, whether it’s 0 or 1 no longer has any meaning. HYSYS determines whether the gas phase fraction is 0 or 1 based on the compression coefficient Z and density, but in supercritical conditions this approach loses its physical significance; therefore it’s unnecessary to consider it – it’s more intuitive to look at the density instead.