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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2523

Title: Model reduction and robust control of multi-stage flash (MSF) desalination plants
Authors: Ali, Emad
Alhumaizi, Khalid
Ajbar, Abdelhamid
Keywords: Model reduction
Robust control
Multi-Stage Flash
MSF
Desalination plants
Issue Date: Jan-1999
Publisher: Elsevier
Citation: Desalination: 121(1); 65-85
Abstract: An orthogonal collocation method is used for the reduction of a large nonlinear model of a multi-stage flash (MSF) desalination plant. The real plant located in Saudi Arabia consists of nineteen stages in the heat recovery section and three in the heat rejection section. It is shown that three collocation points. i.e. two for the heat recovery section and one for the heat rejection section are sufficient for a good representation of the full order model for both steady state and dynamic behavior. The reduced model is then used for a robust controller design of the plant using a constrained non-linear model predictive control (NLMPC) strategy. Numerical simulations show that the controlled system obtained when the reduced model is used for output prediction yield the same performances as with the full order model but with a considerable reduction in the computational time and a much easier tuning of the controller.
Description: Department of Chemical Engineering King Saud University P.O. Box 800, Riyadh 11421, Saudi Arabia Fax: (9661) 467-8770 Email: aajbar@ksu.edu.sa
URI: http://hdl.handle.net/123456789/2523
http://dx.doi.org/10.1016/S0011-9164(99)00008-9
ISSN: 0011-9164
Appears in Collections:College of Engineering

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