주기관 부하에 따른 자켓 냉각수 시스템의 PID 온도 제어

Abstract

The outlet temperature of the jacket cooling-water can be divided into low load and high load conditions based on the load of the main engine in a ship equipped with an exhaust gas bypass system for waste heat recovery. This study designed an extended jacket cooling-water temperature control system capable of maintaining the cylinder liner condition within a tolerable range. A cascade PID control system with two loops was designed in which the outlet temperature of the jacket cooling-water was appropriately generated by the reference signal depending on the main engine load change. The inlet temperature and the outlet temperature of the jacket cooling-water were considered together. To minimize the error and track the set-point as soon as possible to remove any disturbance, the controller parameters were optimized by real-coded genetic algorithms using the integrated square error and the integrated time absolute error performance index as objective functions. The performance evaluation of the control system was performed by computer simulation.