Smith Predictor control is theoretically a good solution to the problem of controlling the time delay systems. Heat Exchangers are widely used in Chemical Industries. The controlled system is a tubular heat exchanger, in which the cold water is heated by hot water and it is a nonlinear system with time delay. The Smith predictor is used for control of the heat exchanger. Smith predictor is an effective control of thermal process can lead to energy savings. This Paper provides an overview of performance conventional PID controller and Smith predictor. It is difficult to tune the parameters and get satisfied control characteristics by using normal conventional PID controller. As the smith predictor has the ability to satisfied control characteristics and it is easy to computing. The experimental results verify that a smith predictor controller has better performance than the PID controller. The simulation of smith predictor for heat exchanger has been done using the software package MATLAB/SIMULINK.

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