کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5146932 | 1497379 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Gas diffusion layer properties on the performance of proton exchange membrane fuel cell: pc-s relationship with K-function
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Accurate capillary pressure-liquid water saturation relationship (pc-s) plays a key role in predicting the performance of proton exchange membrane (PEM) fuel cells and the two-phase flow characteristics in gas diffusion layer (GDL). In this work, a validated Leverett function (K-function) based on the experimental pc-s data for SGL24 and SGL10 series carbon paper GDL materials is incorporated into a three-dimensional and two-phase PEM fuel cell model to investigate the effects of gas diffusion layer properties on the cell performance. Special emphasis is put on Polytetrafluoroethylene (PTFE) loading (5-20Â wt%) in the GDL, compression pressure (1-4Â MPa) and micro-porous layer (MPL). The results show that the cell exhibits better performance when a higher PTFE loading of 20% and a lower compression pressure of 1Â MPa are adopted. However, liquid water is hard to drain from the GDL with the 5Â wt% PTFE loading due to the low hydrophobicity, especially under the ribs; for the high compression pressure of 4Â MPa, small effective porosity caused by the pressure becomes the major resistance of water drainage. The existence of MPL is also very helpful to reduce the water saturation in the GDL.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 46, 14 December 2016, Pages 21827-21837
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 46, 14 December 2016, Pages 21827-21837
نویسندگان
Chao Si, Gui Lu, Xiao-Dong Wang, Duu-Jong Lee,