Steam Cooler Buggy when outlet Vapour Fraction selected
Simulate chemical processes using advanced thermodynamic models
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I am using Steam-97 basis & the cooler throws a buggy value when outlet vapour fraction is selcted to be 0 (meaning only latent heat is to be extracted); while the same cooler UO calculates OK when cooling condensates (sensible heat is extracted)
Apart from sign error the value extracted from 1000kg/hr of steam at 14barg with quality=1 ..is highly under-reported by DWSIM ...other simulators (plus manual check via steam tables) gives a value of 537kW whereas DWSIM 144kW?
Last edit: ioncube 2018-09-07
Thanks for the report. I'll investigate this issue.
You are mixing two different Property Packages and this will break the energy balance across the cooler. DWSIM does not recalculate inlet streams, so you must make sure that inlet streams use the same property package as the unit operation to which they are connected to.
Cannot find the package selection for a material stream? Plus also give me advice of a package selection while dealing with lye systems (such as this)
Sorry Daniel, I had tinkered with DPI settings ..sorry problem resolved