Automatically assigned DDC number: 6602815

Manually assigned DDC number: 6602815

Title: CSTR Performance Limitations Due to Cooling Jacket Dynamics



Subject: Louis P. Russo,B. Wayne Bequette CSTR Performance Limitations Due to Cooling Jacket Dynamics

Description: . The classical exothermic CSTR is known to exhibit complex static and dynamic behavior, although only a two-state (reactor concentration and temperature) model is used. Adding a third state to account for the cooling jacket temperature dynamics has an important influence on the open and closed-loop behavior of exothermic CSTR's. In this paper we show that a stabilizing inner-loop cascade controller is implicitly assumed in the two-state model, because the three-state model may be open-loop unstable in regions where the two-state model is open-loop stable. The affect of process parameters on the open-loop stability of the two-state and three-state CSTR models is examined. We show that when the CSTR is operated at an open-loop unstable operating point, there are right-half-plane zeros in the secondary process transfer function, causing an inherent performance limitation in the closed-loop system. Keywords. CSTR Dynamics, Nonlinear Systems, Cascade Control, Multiplicities, NonminimumPhas...

Contributor: The Pennsylvania State University CiteSeer Archives

Publisher: unknown

Date: 1998-04-06

Pubyear: 1992

Format: ps



Language: en

Rights: unrestricted


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