Multiscale modeling of an angled gas diffusion layer for polymer electrolyte membrane fuel cells: Performance enhancing for aviation applications

被引:26
|
作者
Zhu, Lijun [1 ,2 ,3 ]
Wang, Shaofan [1 ,2 ]
Sui, Pang-Chieh [3 ]
Gao, Xin [1 ,2 ]
机构
[1] Tech Univ Carolo Wilhelmina Braunschweig, Cluster Excellence Sustainable & Energy Efficient, D-38106 Braunschweig, Germany
[2] Tech Univ Carolo Wilhelmina Braunschweig, Inst Energy & Proc Syst Engn, D-38106 Braunschweig, Germany
[3] Wuhan Univ Technol, Sch Automot Engn, Wuhan 430070, Peoples R China
基金
中国国家自然科学基金;
关键词
Aviation applications; PEMFC; Gas diffusion layer; Fiber angle; Angled GDL; Multiscale simulation tool; LIQUID WATER; MASS-TRANSPORT; MICROSTRUCTURE RECONSTRUCTION; PORE-SCALE; PEMFC; CONDUCTIVITY; HETEROGENEITY; PERMEABILITY; COMPRESSION; SIMULATION;
D O I
10.1016/j.ijhydene.2021.03.166
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Green hydrogen powered polymer electrolyte membrane fuel cells (PEMFCs) seem promising for the main propulsion power of future aviation applications. This work establishes a systematic simulation tool for PEMFC studies via seamlessly embodying multiscale models from stochastic reconstruction, through pore scale modeling (PSM), to macroscale computational fluid dynamics (CFD) multi-phase and physics assessing. Using the tool, a novel angled gas diffusion layer (GDL) design, compared to the conventional multi-layer design, is proposed, simulated and studied. Stochastic reconstruction is employed in the GDL structural numerical reconstruction. PSM is charged for the effective transport properties. Results from the CFD simulations show significant gains (tens of percent) in the cell output power and limiting current under the new GDL design. PSM justifies that these gains are primarily sourced from the notable rise in the effective thermal conductivity accompanied by the moderate increase in the effective species diffusivity. PSM also predicts they can be further strengthened with larger fiber angles. All these performance boosts will further secure the competencies of PEMFCs aboard aviation applications. This study also reveals that the internal electric path of a PEMFC is already largely sufficient for the power output. On the other hand, a significant enhancement on the thermal path is still mostly lacking as a future work and to the research community. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:20702 / 20714
页数:13
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