IMPLEMENTATION OF ADAPTIVE-PID CONTROL IN A 10 L STIRRED TANK HEATER

Abstract

When operating a thermal reactor, the temperature of the reactor must be closely regulated to preserve its product specifications. Consequently, a control strategy needs to be developed. In order to address the problem of instability in reactor operation, a 10-liter stirred tank heater (STH) will be employed in the study's laboratory. To maintain a steady volume, the tank was made to overflow. A process reaction curve was employed for fine-tuning PID parameters. The XCOS software was chosen to examine the process control models. The tuning experiment produced controller gain Kc = 215 [kJ/(minute.K)], the integral time constant I = 0.3 minute, and the derivative time constant D = 0.075 minute. In this work, the two temperature control models of the conventional PID and the novel adaptive PID in a 10-liter stirred tank heater were proposed. The two control models with their tuning parameters provided quick and stable responses, as demonstrated in the dynamic simulation study. The integral of the absolute value of the error (IAE) at the tank outlet temperature for conventional control and adaptive control is 1.76 and 0.55 oC, respectively. The adaptive PID controller performed admirably and responded better than conventional PID, according to the closed-loop dynamic simulation.