Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 232, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2020.113803
Keywords
Polymer electrolyte membrane fuel cell; Stacking pressure; Gas diffusion layer; Structural analysis; Computational fluid dynamics
Categories
Funding
- Technology Innovation Program [20009835]
- Ministry of Trade, Industry & Energy (MOTIE, Korea)
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This study investigated the effect of different stacking pressures on PEMFC performance and concluded that stacking pressure should be determined based on channel type and operating voltage to improve performance.
Polymer electrolyte membrane fuel cell (PEMFC) stacks are assembled via the sequential stacking of a number of PEMFC unit cells. In such a process, stacking pressure is applied to the PEMFC stack. This compression pressure causes a change in mass transport and electrical conduction characteristics. In this paper, various stacking pressures were applied to three types of PEMFC unit cells with serpentine, parallel, and interdigitated cathode channels to understand the effect of stacking pressure on PEMFC performance. Numerical analyses were conducted with a validated 3-D PEMFC model. Deformation of the gas diffusion layer (GDL) by compression was not influenced by the channel type. However, the results of the electrochemical simulation showed different influence of stacking pressure depending on the operating voltage and cathode channel type. To improve PEMFC performance, it was concluded that the stacking pressure should be determined by considering the channel type and operating voltage.
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