0
RESEARCH PAPERS: Porous Media

Heat Transfer in a Porous Electrode of Fuel Cells

[+] Author and Article Information
J. J. Hwang

Research Center for Advanced Science and Technology,  Mingdao University, Changhua, 52345 Taiwanazaijj@mdu.edu.tw

J. Heat Transfer 128(5), 434-443 (Oct 21, 2005) (10 pages) doi:10.1115/1.2175092 History: Received February 06, 2005; Revised October 21, 2005

The thermal-fluid behaviors in a porous electrode of a proton exchange membrane fuel cell (PEMFC) in contact with an interdigitated gas distributor are investigated numerically. The porous electrode consists of a catalyst layer and a diffusion layer. The heat transfer in the catalyst layer is coupled with species transports via a macroscopic electrochemical model. In the diffusion layer, the energy equations based on the local thermal nonequilibrium (LTNE) are derived to resolve the temperature difference between the solid phase and the fluid phase. Parametric studies include the Reynolds number and the Stanton number (St). Results show that the wall temperature decreases with increasing Stanton number. The maximum wall temperatures occur at the downstream end of the module, while the locations of local minimum wall temperature depend on the Stanton numbers. Moreover, the solid phase and the fluid phase in the diffusion layer are thermally insulated as St1. The diffusion layer becomes local thermal nonequilibrium as the Stanton number around unity. The porous electrode is local thermal equilibrium for St1. Finally, the species concentrations inside the catalyst and diffusion layers are also provided.

FIGURES IN THIS ARTICLE
<>
Copyright © 2006 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematic drawing of porous electrode of the interdigitated flow field

Grahic Jump Location
Figure 2

Configuration of the computational domain

Grahic Jump Location
Figure 3

Grid test by comparing the axial velocity at Y=2.0

Grahic Jump Location
Figure 4

Comparison of the present predictions with the experimental results

Grahic Jump Location
Figure 5

Velocity magnitudes in the porous electrode at several Y stations, Da=9.83×10−6, Re=10

Grahic Jump Location
Figure 6

Effect of Reynolds number on the velocity magnitude in the porous electrode, Da=9.83×10−6

Grahic Jump Location
Figure 7

Comparison of fluid-phase and solid-phase temperature distributions inside the porous electrode for Re=6, Da=9.83×10−6, and St=0.74

Grahic Jump Location
Figure 8

Comparison of fluid-phase and solid-phase temperature distributions inside the porous electrode for Re=6, Da=9.83×10−6, and St=14.73

Grahic Jump Location
Figure 9

Comparison of fluid-phase and solid-phase temperature distributions inside the porous electrode for Re=6, Da=9.83×10−6, and St=1.473×103

Grahic Jump Location
Figure 10

Effect of Stanton number on the wall temperature distributions for Da=9.83×10−6, and Re=6

Grahic Jump Location
Figure 11

Effect of Reynolds number on the wall temperature distributions for Da=9.83×10−6 and St=1.473×103

Grahic Jump Location
Figure 12

Effect of Reynolds number on the wall temperature distributions for Da=9.83×10−6 and St=1.03

Grahic Jump Location
Figure 13

Oxygen concentration distributions of along the reaction surfaces, Re=6, Da=9.83×10−6, and St=0.74

Grahic Jump Location
Figure 14

Water vapor concentration distributions of along the reaction surfaces, Re=6, Da=9.83×10−6, and St=0.74

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In