Is the Hysys database incomplete? Is Aspen difficult to converge? How to have it both ways
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When I was in school, I first came into contact with Aspen Plus; it felt quite good to use, and I also built a few not-too-complex simulations involving cyclic processes (using process package data). The circuit convergence during that period took quite a long time. After starting work, my colleagues used Hysys for process simulation and found that it performed well in terms of calculating degrees of freedom and achieving rapid convergence; as a result, they began to use Hysys for simulations as well. Currently, I am working with colleagues on developing a full-process simulation for a manufacturing process. I encountered a very awkward problem: 1) The Hysys database is incomplete and does not contain many key substances. When trying to import those key substances using Aspen Property, parameter transmission is incomplete (values such as enthalpy cannot be calculated), which may result in inaccurate simulations + an inability to simulate the reactor ； 2) When using Aspen Plus, the material data is complete (it is necessary to access the NIST property database), but it is difficult to achieve convergence during simulation—especially in terms of loops and columns. Regarding the above issues, I would like to ask the forum members: how can we overcome the dilemma that arises during the simulation of the process flow? First of all, thank you all for your valuable experience and sharing~
HYSYS+Aspen Properties
This post was last edited by sjl_nb on 2016-10-14 09:11. Thank you to 522**. I have tried “HYSYS+Aspen Properties”. However, one particular substance is special; Aspen Properties is used for it (and the NIST property database must be accessed to find it), but some of its properties are not transferred to HYSYS, which prevents the reactor’s enthalpy value from being calculated. How should this situation be handled? Additionally, there is a substance for which, in the AP reactor calculations, an error is indicated indicating the lack of DHFORM or DHAQFM. Is it appropriate to simply add the DHFORM or DHAQF values in the Property Review? Is it still necessary to enter the complete information separately in parameter→pure components? There’s relatively little information available on this topic~ Thank you again, 522**~