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Predicting fractionator dynamics by using a frequency domain solution technique
Author(s) -
Bollinger R. E.
Publication year - 1970
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.690160427
Subject(s) - frequency domain , control theory (sociology) , algebraic equation , transformation (genetics) , feed forward , variety (cybernetics) , domain (mathematical analysis) , computer science , frequency response , dynamics (music) , biological system , time domain , control engineering , mathematics , engineering , nonlinear system , mathematical analysis , chemistry , physics , artificial intelligence , acoustics , biochemistry , control (management) , electrical engineering , quantum mechanics , biology , computer vision , gene
Abstract Methods are described for predicting the dynamic behavior of high purity fractionators. The paper shows how to model both the composition and hydraulic response in towers with many trays and in towers which are subject to a variety of disturbances. The technique involves the transformation of the linear dynamic equations to the frequency domain and the solution of the resulting complex algebraic equations for specific values of frequency. The paper includes a description of the model formulation, solution, and validation, and applications including the design of feedforward controllers.