Abstract
The flow field structure has important effect on the flow characteristics and cell efficiency. So the flow field design and optimization becomes an important method to improve fuel cell's performance. A steady three-dimensional mathematical CFD based model presented in the author's previous paper is applied to investigate spatial distribution of local gas flow field, species concentration and local current density in the PEMFC with multi-channel serpentine flow field in this paper. Numerical study was conducted on a small-scaled single proton exchange membrane fuel cell (the electrode active area 5.9*6.1 cm2). Based on the model, spatial distribution of characteristic parameters as species concentration, fluid flow, local current density and pressure are computed. The flow characteristics and transport mechanism inside the fuel cell are discussed and analyzed. Results indicate that current density is relatively uniform with this design, and cell can offer promise good performance.
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