期刊
POLYMER ELECTROLYTE FUEL CELLS 17 (PEFC 17)
卷 80, 期 8, 页码 133-143出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/08008.0133ecst
关键词
-
资金
- MINECO/FEDER, EU [ENE2015-68703-C2-1-R]
- Department of Energy, Office of Basic Energy Sciences [DE-AC02-05CH11231]
Understanding of the coupled transport processes that occur in thin gas diffusion layers (GDLs) is necessary to develop improved designs. The traditional technique used to model GDLs is the volume-averaged approximation. However, the applicability of this approach has been long questioned, and the error in the results is unclear. In this work, the limitations of GDL volume-averaged models are examined under single-phase conditions. The lattice Boltzmann method is combined with tomography images of carbon-paper GDLs to assess the existence of a representative elementary volume (REV) in terms of various effective properties. Then, the predictions of GDL volume-averaged and pore-scale formulations are compared by using a CFD model of a differential cell. The results show that a REV cannot be clearly defined. This leads to inhomogeneities in the pore-scale model that the volume-averaged model is not able to capture despite the overall flux through the GDL is similar in both cases.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据