In every power plant, the heat exchanger system is one of the most important part and has its own significance in their function. The shell and tube heat exchanger is the most commonly used type of heat exchanger. Since the performance characteristics of shell and tube heat exchanger is non-linear, time varying and time lag. The mathematical model for the function of each element of control loop has been developed and the temperature control system of shell and tube heat exchanger by conventional PID controller and cascade controller has been designed. The simulation of the conventional PID controller and cascade controller was done using MATLAB. The set point tracking and load disturbance rejection features of the controllers are analyzed using different transient criteria and error parameters. The simulation results shows that the performance of cascade controller outperforms the conventional PID controller.

Keywords : Shell and Tube Heat Exchanger ; Conventional PID Controller; Cascade Controller; MATLAB