Accession Number:

ADA592660

Title:

Development of a Coupled 2D-3D Fuel Cell Model for Flow Field Analysis

Descriptive Note:

Conference paper

Corporate Author:

ILLINOIS UNIV AT URBANA DEPT OF NUCLEAR ENGINEERING

Report Date:

2006-06-01

Pagination or Media Count:

52.0

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, Darcys 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.

Subject Categories:

  • Electrochemical Energy Storage
  • Operations Research
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE