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Simulation of the Dynamic Characteristics of a PEMFC System in Fluctuating Operating Conditions

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  • Jiangyan Yan

    (Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China
    Department of Power Engineering, Wuhan University, Wuhan 430072, China)

  • Chang Zhou

    (Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China)

  • Zhihai Rong

    (Research Institute, China Resources Power, Shenzhen 518001, China)

  • Haijiang Wang

    (Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China)

  • Hui Li

    (Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
    Shenzhen Key Laboratory of Hydrogen Energy, Southern University of Science and Technology, Shenzhen 518055, China)

  • Xuejiao Hu

    (Department of Power Engineering, Wuhan University, Wuhan 430072, China)

Abstract

A greater understanding of the dynamic processes inside the stack is urgently needed to optimize the PEMFC (proton exchange membrane fuel cell). In this study, we examined the gas, water and electrochemical processes inside the stack, studied the physical dynamics of system accessories such as gas supplement, flow and pressure-regulating devices, then used Simulink to build a mathematical model of a complete PEMFC system; a segmented testing platform was built to test the spatial distribution of RH (relative humidity) and pressure, which was used to verify the simulation model; based on this model, the complicated phenomena occurring inside the stack during fluctuating operating states were calculated. Our findings showed that the pressure in the gas channel and exhaust manifolds decreased when the external load increased, changing sharply at the moment of load change. The transient pressure difference between the cathode and anode sides (several kPa) had a huge impact on the MEA (membrane electrode assembly); when the load current increased, RH in cathode and cathode channel increased gradually, and the increasing rate of anode side was bigger than that in cathode side. The influence of variance magnitude and change interval of external load were also studied based on the model.

Suggested Citation

  • Jiangyan Yan & Chang Zhou & Zhihai Rong & Haijiang Wang & Hui Li & Xuejiao Hu, 2020. "Simulation of the Dynamic Characteristics of a PEMFC System in Fluctuating Operating Conditions," Energies, MDPI, vol. 13(14), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:14:p:3596-:d:383651
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    References listed on IDEAS

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    1. Hong, Po & Xu, Liangfei & Li, Jianqiu & Ouyang, Minggao, 2017. "Modeling of membrane electrode assembly of PEM fuel cell to analyze voltage losses inside," Energy, Elsevier, vol. 139(C), pages 277-288.
    2. Xu, Liangfei & Fang, Chuan & Li, Jianqiu & Ouyang, Minggao & Lehnert, Werner, 2018. "Nonlinear dynamic mechanism modeling of a polymer electrolyte membrane fuel cell with dead-ended anode considering mass transport and actuator properties," Applied Energy, Elsevier, vol. 230(C), pages 106-121.
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