Effects of bolt pre-loading variations on performance of GDL in a bolted PEMFC by 3-D FEM analysis

被引：57

作者：

Chien, Chi-Hui ^{[1
]}

Hu, Yao-Lun ^{[1
]}

Su, Ting-Hsuan ^{[1
]}

Liu, Hsuan-Ting ^{[1
]}

Wang, Chung-Ting ^{[2
]}

Yang, Ping-Feng ^{[2
]}

Lu, Ying-Xu ^{[2
]}

机构：

[1] Natl Sun Yat Sen Univ, Dept Mech & Electroengn, 70 Lien Hai Rd, Kaohsiung 80424, Taiwan

[2] Adv Semicond Engn Inc, Dept Product Characterist, 26 Chin,3rd Rd, Kaohsiung 811, Taiwan

来源：

ENERGY | 2016年 / 113卷

关键词：

PEMFC; FEM; GDL; Bolt pre-loading; Compression ratio; Contact resistance; Porosity; GAS-DIFFUSION LAYER; MEMBRANE FUEL-CELL; COMPRESSION; CHANNEL;

D O I：

10.1016/j.energy.2016.07.075

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This study numerically investigated the effects of different bolt pre-loadings on the performance of the gas diffusion layer (GDL) in a bolted proton exchange membrane fuel cell (PEMFC). Firstly, a complete three-dimensional finite element model of a PEMFC bolted by 12 bolts with a reactive area of 5 cm by 5 cm was established using the commercial software Solid Works. Then, a pre-loading of 1 MPa to 7 MPa on each bolt was applied, increasing in increments 1 MPa, and the corresponding deformation and stress fields of each component of the fuel cell were obtained using the commercial software ANSYS 15.0/Workbench. Finally, the effects of the bolt pre-loading variations on the performance of the GDL were discussed. The results showed that the compression ratio of the GDL increased linearly with the magnitude of bolt pre-loading, and improving the performance of the GDL. However, when the pre-loading on each bolt reached 7 MPa, the compression ratio exceeded 15%, degrading the efficiency of the PEMFC. Also, by comparing the relationships between bolt pre-loading and conductivity and porosity of GDL, in order to obtain the maximum performance of GDL, an optimum value of 4 MPa for bolt preloading was recommended. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1174 / 1187

页数：14

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