Study On The Thermal Managenment System Of The Water-Cooled PEMFC

With the low noise, no pollution, long life, large output current, low operating temperature, high energy efficiency, fast boot speed and other advantages, the Proton exchange membrane fuel cell (PEMFC) has attracted more attention of people. However, the output performance of the PEMFC is affected by many factors, especially the operating temperature is one of the most important factors. A reasonable thermal management system can improve the performance and life of the PEMFC. On the contrary, an improper one will contribute to a lower output performance and life of the PEMFC and trigger an experimental security incident. Therefore, it is meaningful to study the thermal management system of the water-cooled proton exchange membrane fuel cell.Firstly, based on the temperature characteristics, temperature simulation model, control method and whole system of the PEMFC, this paper introduces the research status of water-cooled proton exchange membrane fuel cell. And then based on the principle and the experimental data, a thermal management model of the water-cooled proton exchange membrane fuel cell system is proposed. Through the experimental analysis, its steady and dynamic characteristics are very well.Secondly, in order to satisfy the technology requirements of thermal management system of the water-cooled PEMFC, considering the shortcomings of traditional structure and control strategy, a new structure and control strategy are proposed. And the simulation and experiment result show it can solve the problems of the temperature fluctuations, coupling system and others.Finally, with the data acquisition card and LabVIEW, an entire water-cooled PEMFC testing system is designed and built, which contains the hydrogen supply system, air supply system, thermal management systems, back-pressure systems, single-chip data acquisition system and other subsystems. According to the operating requirements, the operating parameters of the system can be set on the testing system. While it also provides a good control interface for monitoring the operation state of the PEMFC and deal with the different emergency situations. Then the working current of the fuel cell locomotive is simulated on the testing system to analysis the operation state of PEMFC, which provides the basis for the research on the fuel cell locomotive.