化工学报2017，Vol.68Issue(4)：1490-1498,9.DOI:10.11949/j.issn.0438-1157.20161219
水冷PEMFC热管理系统流量跟随控制策略
Flow following control strategy for thermal management of water-cooled PEMFC
摘要
Abstract
For the strong coupling problem that exists in the operation process of a water-cooled proton exchange membrane fuel cell (PEMFC) and to improve the performance and life of the PEMFC, a temperature control strategy for flow-following-current was proposed, this strategy regulates the coolant flow based on the current value thereby controls the temperature difference between the coolant inlet and outlet of a stack, the PID controller controls the inlet temperature of coolant by regulating the rotational speed of the radiator fan. Due to the different changes of current and power in the dynamic operation process of PEMFC, the system temperature changes in flow-following-current and power were needed to research respectively. Comparative experiments between the traditional control strategy and the flow following strategy were made on a test platform for the thermal management of the PEMFC. The results show that when compared with the traditional control strategy, the flow-following-current strategy could reduce the maximum overshoot of the coolant outlet temperature by 64.3% and decrease the maximum difference between the coolant inlet and outlet temperatures by 46.7%,the response time of system was reduced by 73 s at least. Besides the temperature changes were more stable in the flow-following-current compared to the flow-following-power. The flow-following-current strategy has realized a higher control precision and response speed, strong coupling between radiator fan and water pump can be effectively weakened, a short-term heating also can be avoided inside the stack when the current is greatly increased. The flow-following-current strategy can well meet the requirements on the temperature control of fuel cell systems.关键词
燃料电池/水热/控制/瞬态响应/流量跟随Key words
fuel cells/hydrothermal/control/transient response/flow following分类
信息技术与安全科学引用本文复制引用
陈维荣,牛茁,韩喆,刘优贤,刘志祥..水冷PEMFC热管理系统流量跟随控制策略[J].化工学报,2017,68(4):1490-1498,9.基金项目
国家科技支撑计划(2014BAG08B01) （2014BAG08B01）
国家自然科学基金面上项目(51677157).supported by the National Key Technology Research and Development Program of China (2014BAG08B01) and the National Natural Science Foundation of China(51677157). （51677157）
