Development of a Coupled 2D-3D Fuel Cell Model for Flow Field Analysis
Abstract
The sodium borohydride and hydrogen peroxide liquid fuel cell developed at the University of Illinois shows promise as a viable energy source for a wide range of applications. To achieve higher powers for a fixed active area, an optimal flow field design is desired. To aid in this venture a coupled 2D-3D model of the fuel cell was developed using the COMSOL Multiphysics software package. At this stage in development, we are comparing the model to experimental data to develop an understanding of its predictive capabilities. The model is governed by the Butler-Volmer equation, Navier-Stokes incompressible flow equations, Darcy's law, and the convection and diffusion equations that express the electrical characteristics, momentum conservation, and mass conservation respectively. Results show modifications in the serpentine flow field design can create a significant improvement in current generation. Calculated voltage versus current plots for the standard design matched experimental results accurately, but deviations entered when other flow fields were used. These inaccurates are mainly attributed to change in the over potential created by change in the flow field. Despite these difficulties the model correctly predicted the highest performing flow field designs. With these modifications the power can be significantly increased compared to the standard case.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2006
- Accession Number
- ADA592660
Entities
People
- George H. Miley
- Glenn Hawkins
- Jacob Englander
Organizations
- University of Illinois Urbana–Champaign