Research on modeling and control of PEMFC cooling system

Abstract

The structure of the stack cooling system has been redesigned to combine the high heat dissipation efficiency of the large-small cycle system and the low maintenance cost of the internal-external cycle system. Four temperature control strategies for the cooling system were proposed and tested on the stack test platform. The results show that the strategy of controlling the pump flow rate through feedforward with flow following current and Model Predictive Control(MPC) algorithm feedback, and controlling the opening of the radiator fan through Proportion Integration Differentiation(PID) algorithm feedback, is the most effective. This strategy can control the maximum temperature difference between the coolant inlet and outlet at approximately 1.14 °C. It also allows for quicker adjustment of the coolant temperature to the target value when the load changes, with an adjustment time reduced to about 9 s and a steady state error lower than 0.51 °C.