https://scholars.lib.ntu.edu.tw/handle/123456789/408266
Title: | Flow field optimization for proton exchange membrane fuel cells with varying channel heights and widths | Authors: | Wang X.-D. Huang Y.-X. Cheng C.-H. Jang J.-Y. Lee D.-J. Yan W.-M. Su A. |
Keywords: | Flow field design;Optimization;Serpentine flow field;Simplified conjugate-gradient method;Sub-rib convection | Issue Date: | 2009 | Journal Volume: | 54 | Journal Issue: | 23 | Start page/Pages: | 5522-5530 | Source: | Electrochimica Acta | Abstract: | The optimal cathode flow field design of a single serpentine proton exchange membrane fuel cell is obtained by adopting a combined optimization procedure including a simplified conjugate-gradient method (SCGM) and a completely three-dimensional, two-phase, non-isothermal fuel cell model. The cell output power density P cell is the objective function to be maximized with channel heights, H 1 -H 5 , and channel widths, W 2 -W 5 as search variables. The optimal design has tapered channels 1, 3 and 4, and diverging channels 2 and 5, producing 22.51% increment compared with the basic design with all heights and widths setting as 1 mm. Reduced channel heights of channels 2-4 significantly enhance sub-rib convection to effectively transport oxygen to and liquid water out of diffusion layer. The final diverging channel prevents significant leakage of fuel to outlet via sub-rib convection from channel 4. Near-optimal design without huge loss in cell performance but is easily manufactured is discussed. ? 2009 Elsevier Ltd. All rights reserved. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408266 | ISSN: | 00134686 | DOI: | 10.1016/j.electacta.2009.04.051 |
Appears in Collections: | 化學工程學系 |
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