Regulatory control of a chaotic nonisothermal CSTR

Applications of chaos and fractals in process systems engineering

A mathematical optimization approach for targeting the minimum utility consumption in heat-integrated process water networks is proposed in this paper. The linear programming formulations are developed for heat integration in fixed flow rate water allocation networks, for both single and multiple contaminants, incorporating isothermal mixing. Heat integration in water allocation networks is also addressed through nonisothermal mixing of streams, and this is formulated as a discontinuous nonlinear programming problem. Utility requirements, for isothermal as well as for nonisothermal mixing, are compared over a range of minimum approach temperatures to evaluate the energy performance using illustrative examples. The number of required heat exchangers is less in heat-integrated water allocation problems with nonisothermal mixing. Simultaneous optimization of the overall heat-integrated water allocation network, to minimize the operating cost, is also formulated and solved.

Heat Integration in Process Water Networks

Seamless chemical engineering science: The emerging paradigm

Seamless chemical engineering science : the emerging paradigm

Since many process control designs suffer degradation or failure from systems with input constraints and/or complex dynamic behavior, the control objective is to stabilize reactor systems which have constraints on both the magnitude and the rate of change of manipulated input. The developed constrained control schemes are composed of a nonlinear feedback for achieving the satisfactory tracking performance combined with a high-gain control to impair other possible large controller motions. On the basis of this two-input control scheme, the closed-loop stability can be guaranteed, and the bounded output regulation can also be achieved. Within the stable observation framework, the saturated output feedback control is developed. Finally, the proposed four designs are all evaluated through the simulations of the control of a nonisothermal CSTR with chaotic behavior.

Regulatory control of a chaotic nonisothermal CSTR

Citations

Applications of chaos and fractals in process systems engineering

Heat Integration in Process Water Networks

Seamless chemical engineering science: The emerging paradigm

Seamless chemical engineering science : the emerging paradigm

Nonlinear Bounded Control of a Nonisothermal CSTR

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