A one-dimensional, steady-state, two-phase, isothermal numerical simulations were performed to investigate the effect on cell performance of a PEM fuel cell under non-uniform porosity of gas diffusion layer. In the simulation, the non-uniform porosity of gas diffusion layer was taken into account to analyze the transport phenomena of water flooding and mass transport in the gas diffusion layer. The porosity of the gas diffusion layer is treated as a linear function. Furthermore, the structure of the catalyst layer is considered to be a cylindrical thin-film agglomerate. Regarding the distribution analysis of liquid water saturation, oxygen concentration and water concentration depend on the porosity of gas diffusion layer. In the simulation, the εCG and εGC represent the porosity of the interfaces between the channel and gas diffusion layer and the gas diffusion layer and the catalyst layer, respectively. The simulation results indicate that when the (εCG, εGC) = (0.8, 0.4), higher liquid water saturation appears in the gas diffusion layer and the catalyst layer. On the contrary, when the (εCG, εGC) = (0.4, 0.4), lower liquid water saturation appears. Once the liquid water produced by the electrochemical reaction and condensate of vapor water may accumulate in the open pores of the gas diffusion layer and reduced the oxygen transport to the catalyst sites. This research attempts to use a thin-film agglomerate model, which analyze the significant transport phenomena of water flooding and mass transport under linear porosity gradient of gas diffusion layer in the cathode of a PEM fuel cell.
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ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability
August 7–10, 2011
Washington, DC, USA
Conference Sponsors:
- Advanced Energy Systems Division
ISBN:
978-0-7918-5469-3
PROCEEDINGS PAPER
Effect of Porosity Gradient in Gas Diffusion Layer on Cell Performance With Thin-Film Agglomerate Model in Cathode Catalyst Layer of a PEM Fuel Cell Available to Purchase
Chun-I Lee,
Chun-I Lee
Industrial Technology Research Institute, Hsinchu, Taiwan
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Shiqah-Ping Jung,
Shiqah-Ping Jung
Industrial Technology Research Institute, Hsinchu, Taiwan
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Kan-Lin Hsueh,
Kan-Lin Hsueh
Industrial Technology Research Institute, Hsinchu, Taiwan
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Chi-Chang Chen,
Chi-Chang Chen
Industrial Technology Research Institute, Hsinchu, Taiwan
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Wen-Chen Chang
Wen-Chen Chang
Industrial Technology Research Institute, Hsinchu, Taiwan
Search for other works by this author on:
Chun-I Lee
Industrial Technology Research Institute, Hsinchu, Taiwan
Shiqah-Ping Jung
Industrial Technology Research Institute, Hsinchu, Taiwan
Kan-Lin Hsueh
Industrial Technology Research Institute, Hsinchu, Taiwan
Chi-Chang Chen
Industrial Technology Research Institute, Hsinchu, Taiwan
Wen-Chen Chang
Industrial Technology Research Institute, Hsinchu, Taiwan
Paper No:
FuelCell2011-54838, pp. 895-901; 7 pages
Published Online:
March 22, 2012
Citation
Lee, C, Jung, S, Hsueh, K, Chen, C, & Chang, W. "Effect of Porosity Gradient in Gas Diffusion Layer on Cell Performance With Thin-Film Agglomerate Model in Cathode Catalyst Layer of a PEM Fuel Cell." Proceedings of the ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology. Washington, DC, USA. August 7–10, 2011. pp. 895-901. ASME. https://doi.org/10.1115/FuelCell2011-54838
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