Design of PID Controller for controlling fluid temperature of Heat Exchanger System

Abstract

Heat exchanger system is widely used in chemical plants because it can sustain wide range of temperature and pressure. The main purpose of a heat exchanger system is to transfer heat from a hot fluid to a cooler fluid, so temperature control of outlet fluid is of prime importance. Because any limit increasing or decreasing in the temperature may causes some problems in the stability of the system. Any Increased in process temperature may be reaching the Ignition point such as in Petrochemical Industries. The proposed approach employs a PID feedback controller and feedback plus feed-forward controller to regulate the temperature of an outlet fluid of a shell and tube heat exchanger to a certain reference value. The transient performance and the error criteria of the controllers are analyzed and the best controller is found out. From the simulation results, it is found out that the PID controller has best the performance comparison with feedback plus feed forward controller. The modal is developed using Simulink/MATLAB and simulations results are generated.