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Corrected flowrates estimation by using θ convergence promoter for distillation columns
Author(s) -
Pierucci S. J.,
Ranzi E. M.,
Biardi G. E.
Publication year - 1983
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690290116
Subject(s) - convergence (economics) , tray , distillation , fractionating column , column (typography) , instability , mathematics , chromatography , chemistry , computer science , mechanics , engineering , geometry , mechanical engineering , physics , connection (principal bundle) , economics , economic growth
Abstract The main task of the θ convergence promoter is to afford a better estimate of liquid and vapor molar fractions in each tray of the column. The assumptions implied by the promoter prove to be reliable for conventional columns, while they may cause numerical instability when dealing with nonconventional configurations. In these cases, corrected molar fractions may be computed only after making a supplementary assumption, which in principle is not unique. So, the paper presents a new methodology which gives rather satisfactory results.