Performance comparison of different control strategies for heat exchanger networks

Author:

Mahitthimahawong Siwaporn1,Chotvisut Yada2,Srinophakun Thongchai1

Affiliation:

1. Kasetsart University , Department of Chemical Engineering , 50 Ngamwongwan Rd., Ladyao, Jatujak, Bangkok 10900 , Thailand

2. King Mongkut’s University of Technology Thonburi , Chemical Engineering Practice School , 126 Pracha-utid Road, Bangmod, Thoongkru, Bangkok 10140 , Thailand

Abstract

Abstract In this article, the dynamic responses of heat exchanger networks to disturbance and setpoint change were studied. Various control strategies, including: proportional integral, model predictive control, passivity approach, and passivity-based model predictive control were used to monitor all outlet temperatures. The performance of controllers was analyzed through two procedures: 1) inducing a ±5% step disturbance in the supply temperature, or 2) tracking a ±5°C target temperature. The performance criteria used to evaluate these various control modes was settling time and percentage overshoot. According to the results, the passivity-based model predictive controllers produced the best performance to reject the disturbance and the model predictive control proved to be the best controller to track the setpoint. Whereas, the ensuing performance results of both the PI and passivity controllers were discovered to be only acceptable.

Publisher

Walter de Gruyter GmbH

Subject

General Chemical Engineering,General Chemistry,Biotechnology

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