Vol. 107, Issue 8, August 2009, pp. 144-156

Enhancement of Heat Exchanger Control Using Improved PID Controller

Gopalakrishna G., Sivakumaran N. and ^*Sivashanmugam P.

Modelling and Simulation Research Laboratory, Department of Chemical Engineering,

National Institute of Technology, Tiruchirappalli-620 015, India

Fax: +91 431 2500133

^*E-mail: psiva@nitt.edu

Received: 8 April 2009   /Accepted:  15 August 2009   /Published: 25 August 2009

Abstract: The Proportional, Integral and Derivative (PID) controllers are widely used in industrial applications. Their popularity comes from their robust performance and also from their functional simplicity. Temperature control of double tube heat exchanger system is presented and ant colony algorithm for optimizing PID parameters of temperature controller is presented in this paper on the basis of conventional PID controller. Temperature controller based on ant colony optimization for double tube heat exchanger is designed. Simulation results show that, for the case of heat exchanger system, ACO-PID is good model and generalize well. The closed loop unit step response obtained with the proposed PID compares favorably with the one achieved using a conventional PID controller with dynamic closed-loop simulation. More important, the proposed approach takes a fraction of the time spent by the standard technique, without the need of perturbing the closed-loop system.

Keywords: PID controller, Ant colony optimization, Foraging, Combinatorial optimization

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