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STABILITY AND DYNAMIC PERFORMANCE OF PLANTS WITH RECYCLE
Abstract
The introduction of material recycle and heat integration in a chemical plant causes an increase of the dominant eigenvalue of the plant and can even result in instability. The stability of complete chemical plants is examined in three domains; time, Laplace and frequency domain. The time domain was found appropriate mainly for the study of the dynamic behavior of integrated processes and not for stability evaluations. In the Laplace domain, a method is developed for the evaluation of stability of complete chemical plants. The method is simple and can be used during the preliminary design stages of a plant. Stability studies in the frequency domain were found to be of limited applicability. The effect of recycle loops on the Relative Gain Array (RGA) for a unit is examined. It is found that for the calculation of the RGA for a unit, the coupling of the unit with the rest of the units in the plant should be taken into account. Guidelines are given for the development of a Dynamic "Expert" System to be used for stability, dynamic and control studies of complete chemical plants.
Subject Area
Chemical engineering
Recommended Citation
PAPADOURAKIS, ANTONIS, "STABILITY AND DYNAMIC PERFORMANCE OF PLANTS WITH RECYCLE" (1985). Doctoral Dissertations Available from Proquest. AAI8602670.
https://scholarworks.umass.edu/dissertations/AAI8602670