Improved control of an industrial sugar crystalliser: a dynamic optimisation approach

Vu, T.T.L., and Schneider, P.A. (2002) Improved control of an industrial sugar crystalliser: a dynamic optimisation approach. In: Proceedings of the 35th European Symposium of the Working Party on Computer Aided Process Engineering- 12 (ESCAPE-12) (10) pp. 571-576. From: ESCAPE-12, 26-29 May 2002, The Hague, Netherlands.

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The controllability of an industrial sugar crystalliser is investigated. Using a simultaneous integration and optimisation approach, the optimal control problem is formulated in GAMS, based on a dynamic model of the vacuum pan validated against plant data. MINOS 2.50 solves this open-loop model, yielding: the minimum batch time, set-point trajectories and the optimal switching from high to low purity feed. These results are implemented within double-loop PI controllers. Alternative control variables are proposed, replacing traditional process outputs, which are not fundamentally process-relevant. Dynamic simulation results show that the proposed control schemes are satisfactory in the face of errors in growth rate correlations and variations in feed properties and initial batch conditions. Preliminary full-scale investigations have shown promise and will be extended into next year's sugar cane crushing season.

Item ID: 14646
Item Type: Conference Item (Research - E1)
ISBN: 978-0-444-51109-6
Keywords: batch; optimisation; sugar; cacuum pan
Date Deposited: 09 Oct 2017 23:15
FoR Codes: 09 ENGINEERING > 0904 Chemical Engineering > 090407 Process Control and Simulation @ 100%
SEO Codes: 86 MANUFACTURING > 8606 Industrial Chemicals and Related Products > 860699 Industrial Chemicals and Related Products not elsewhere classified @ 100%
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