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Application of Model Predictive Control to Renewable Energy Development via Reactive Distillation Process

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Abstract:

Reactive distillation is a process that combines chemical reaction and separation in a single piece of equipment (distillation column). The process has a lot of benefits especially for those reactions occurring at conditions suitable for the distillation of the process components, and these result in significant economic advantages. However, owing to the complexities resulting from the integration of reaction and separation, its control is still a challenge to process engineers because it requires a control method that is robust enough to handle its complexities. Therefore, in this work, model predictive control (MPC) has been applied to a reactive distillation process used for developing a renewable energy known as biodiesel. The control algorithm of the MPC was formulated with the aid of MPC toolbox of MATLAB/Simulink in which the closed-loop models of the process were developed and simulated. The analysis of the results obtained from the simulations carried out for the optimization of the tuning parameters revealed that, among the tuning parameters considered, integral absolute error of the control system was less affected by the control horizon because its p-value was greater than 0.05 based on 95% confidence level. Furthermore, the simulation of the closed-loop system of the process using model predictive control tuned with control horizon of 11, prediction horizon of 18, weight on manipulated variable rate of 0.05 and weight on output variable of 2.17, which were the optimum parameters obtained using Excel Solver, showed that the system was well handled by the controller under servo control because it was able to get settled at desired mole fractions within 60 min. However, the settling time recorded in the case of regulatory control system of the process with the same controller was found not to be encouraging. Therefore, it is recommended that further work should be carried out on this subject matter in an attempt to obtain tuning parameters that will make the settling time of the closed-loop system of the process under regulatory control simulation very reasonable.

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International Journal of Engineering Research in Africa Vol. 27 View Preview

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Periodical:

International Journal of Engineering Research in Africa (Volume 27)

Pages:

95-110

DOI:

https://doi.org/10.4028/www.scientific.net/JERA.27.95

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Online since:

December 2016

Authors:

Saidat Olanipekun Giwa, Abel Adekanmi Adeyi, Abdulwahab Giwa*

Keywords:

MATLAB, Model Predictive Control (MPC), Modelling, Reactive Distillation, Renewable Energy, Simulation

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Creative Commons CC BY 4.0

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* - Corresponding Author

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