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  4. Flow field optimization for proton exchange membrane fuel cells with varying channel heights and widths
 
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Flow field optimization for proton exchange membrane fuel cells with varying channel heights and widths

Journal
Electrochimica Acta
Journal Volume
54
Journal Issue
23
Pages
5522-5530
Date Issued
2009
Author(s)
Wang X.-D.
Huang Y.-X.
Cheng C.-H.
Jang J.-Y.
Lee D.-J.  
Yan W.-M.
Su A.
DOI
10.1016/j.electacta.2009.04.051
URI
https://scholars.lib.ntu.edu.tw/handle/123456789/408266
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-67649170461&doi=10.1016%2fj.electacta.2009.04.051&partnerID=40&md5=967d2be2e7216d487a4fb2e2bf8e0b8b
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.
Subjects
Flow field design
Optimization
Serpentine flow field
Simplified conjugate-gradient method
Sub-rib convection
Type
journal article

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