[Solved] How to set Aspen to use mass as the basis for calculations
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This post was last edited by Roupan on 2019-2-26 11:27. In AspenV8.4, if I select \"fraction basis\" as \"mass\" in the report options, will the calculations of the gas fraction of the phases all be based on mass? If not, how should it be set to be quality-based? I’m a newcomer to Aspen and need some guidance from those who are more experienced.
It doesn’t matter what basis is used for the calculation; you can fill it in as needed when entering the data. Choosing between quality and moles for the report is done to make it easier to view
For example, in the case of flashing, I set the ITID ratio at the top of the tank to 0.5, which means that the moles of product discharged are 50% of those of the feed. But what I want is for the mass to account for 50% – how should I adjust it?
Where the molar fraction can be adjusted, it’s usually possible to choose mass; or you can take a screenshot to check – I don’t have Aspen available
It’s the red part; usually this is calculated on a molar basis, and I want to change it to a mass basis
This probably can’t be changed. If it’s a mixture, conduct a sensitivity analysis and let it iterate several times until the desired result is achieved; or, more simply, adjust it manually to see whether the quality of the logistics is half as good.
Okay, understood. Thanks, big guy :lol