How to estimate binary interaction parameters when HYSYS calls the Aspen fluid package?
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I have a question for everyone. When I use HYSYS for simulations, I invoke Aspen’s component and thermodynamic methods; the NRTL method is chosen for thermodynamics. In HYSYS, it is possible to use UNIFAC to estimate the missing binary interaction parameters, but this option is not available when using Aspen’s NRTL method. How can I then estimate these binary interaction parameters?
Copy the components of Aspen properties to the HYSYS components
Well, I’m a bit confused by your question. It is of course possible to perform estimations in ASPEN (using either NRTL or UNIFAC methods), but this is only feasible in the data regression mode, by using regression analysis based on certain gas-liquid or liquid-vapor phase equilibrium data. Several activity coefficient model equations (Wilson, NRTL, Unifac are all acceptable; select the appropriate one for the relevant terms) ； And in the first half you said to call? Is it in analysis mode? If you call it directly, it means you are using the binary parameters in the system database directly, and no further estimation is possible.