How to calculate the bubble point of a mixture using PROII?
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How to use PROII to simulate the bubble point of mixtures? ? Can FLASH be used? How to set it up?
The setup is very simple: either set a temperature first or set a pressure first; for the remaining conditions, just specify the bubble point, and the corresponding bubble point pressure or temperature will be calculated.
In pro11, it is even possible to avoid setting up FLASH; only a logistics setup is required. The accuracy of the results depends heavily on sound thermodynamic methods and accurate interaction parameters (in other words, the results can be obtained easily, but careful consideration is needed to get them accurate).
There is also a more comprehensive approach, the HCurve heating curve method, which allows for the direct determination of the bubble point and dew point under various conditions, thereby generating bubble point lines and dew point lines.
It is also possible to calculate using simple hx
For a single stream, set the vapor mole fraction to 0; the temperature at which this stream operates is then the bubble point
It’s very simple to use PROII to simulate the bubble point of a mixture – just define the pressure and bubble point of the material, and then check the bubble point temperature. However, Aspen is much simpler than PROII.
I have also noticed that the properties of materials vary depending on the model, especially when there are two phases at a specific temperature, as the temperature is very sensitive to changes. The accuracy of the results can only be judged based on production experience.
That’s true; it’s essential to choose the appropriate thermodynamics, otherwise the data generated by the simulation will differ significantly from the actual data from the factory.
Yes, thermodynamic models are very important, especially when the mixtures are complex; it is necessary to determine the appropriate property evaluation methods for such systems.