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Droplet dynamic characteristics on PEM fuel cell cathode gas diffusion layer with gradient pore size distribution

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  • Wang, Yulin
  • Wang, Xiaodong
  • Wang, Xiaoai
  • Liu, Tao
  • Zhu, Tingting
  • Liu, Shengchun
  • Qin, Yanzhou

Abstract

Understanding of droplet dynamic characteristics on gas diffusion layer (GDL) of polymer electrolyte membrane (PEM) fuel cell is of great importance for cell performance improvement. This study comprehensively investigated droplet dynamic characteristics on fuel cell cathode GDL with gradient pore size distribution (GPSD). The influence of different pore sizes, GPSD and wettabilities of GDL on droplet dynamic characteristics is numerically evaluated by using the volume of fluid (VOF) method through the analysis of the interaction among the forces over droplet. Results indicate that droplet has a relatively short detachment time and a smaller detachment radius on superhydrophobic and superhydrophilic GDLs compared with on a moderately hydrophobic GDL regardless of pore size. Moreover, large pores can facilitate droplet detachment, but increase droplet detachment radius and pressure drop. Compared with uniform (U)PSD, for transverse (T)-GPSDs with a small pore distance at a relatively low airflow velocity or a large pore distance at a high airflow velocity, or for the longitudinal (L)-GPSD with a large pore in the upstream and a small pore in the downstream at a large pore distance, the droplet detachment time decreases by 34.3% and 25.2% with a reduction of pressure drop, respectively.

Suggested Citation

  • Wang, Yulin & Wang, Xiaodong & Wang, Xiaoai & Liu, Tao & Zhu, Tingting & Liu, Shengchun & Qin, Yanzhou, 2021. "Droplet dynamic characteristics on PEM fuel cell cathode gas diffusion layer with gradient pore size distribution," Renewable Energy, Elsevier, vol. 178(C), pages 864-874.
    • Handle: RePEc:eee:renene:v:178:y:2021:i:c:p:864-874
    DOI: 10.1016/j.renene.2021.06.135
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    References listed on IDEAS

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    Cited by:

    1. Wang, Yulin & Xu, Haokai & Zhang, Zhe & Li, Hua & Wang, Xiaodong, 2022. "Lattice Boltzmann simulation of a gas diffusion layer with a gradient polytetrafluoroethylene distribution for a proton exchange membrane fuel cell," Applied Energy, Elsevier, vol. 320(C).
    2. Wang, Yulin & Wang, Xiaoai & Fan, Yuanzhi & He, Wei & Guan, Jinglei & Wang, Xiaodong, 2022. "Numerical Investigation of Tapered Flow Field Configurations for Enhanced Polymer Electrolyte Membrane Fuel Cell Performance," Applied Energy, Elsevier, vol. 306(PA).
    3. Gong, Fan & Yang, Xiaolong & Zhang, Xun & Mao, Zongqiang & Gao, Weitao & Wang, Cheng, 2023. "The study of Tesla valve flow field on the net power of proton exchange membrane fuel cell," Applied Energy, Elsevier, vol. 329(C).
    4. Huang, Haozhong & Liu, Mingxin & Li, Xuan & Guo, Xiaoyu & Wang, Tongying & Li, Songwei & Lei, Han, 2022. "Numerical simulation and visualization study of a new tapered-slope serpentine flow field in proton exchange membrane fuel cell," Energy, Elsevier, vol. 246(C).
    5. Hu, Haowen & Ou, Kai & Yuan, Wei-Wei, 2023. "Fused multi-model predictive control with adaptive compensation for proton exchange membrane fuel cell air supply system," Energy, Elsevier, vol. 284(C).
    6. Liu, Huize & Hu, Zunyan & Li, Jianqiu & Xu, Liangfei & Shao, Yangbin & Ouyang, Minggao, 2023. "Investigation on the optimal GDL thickness design for PEMFCs considering channel/rib geometry matching and operating conditions," Energy, Elsevier, vol. 282(C).
    7. Wang, Yulin & Wang, Han & Wang, Guozhuo & Li, Hua & Zhao, Yulong & He, Wei, 2023. "Enhancement of water droplet drainage performance in a cathode flow channel with baffles for a polymer electrolyte membrane fuel cell," Renewable Energy, Elsevier, vol. 219(P1).

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