0
Research Papers

Numerical Investigation of a Delta High Power Density Cell and Comparison With a Flattened Tubular High Power Density Cell

[+] Author and Article Information
Arun K. S. Iyengar1

Stationary Fuel Cells, Siemens Power Generation Inc., 1310 Beulah Road, Pittsburgh, PA 15235-5098

Niranjan A. Desai, Shailesh D. Vora, Larry A. Shockling

Stationary Fuel Cells, Siemens Power Generation Inc., 1310 Beulah Road, Pittsburgh, PA 15235-5098

1

Corresponding author.

J. Fuel Cell Sci. Technol 7(6), 061002 (Aug 17, 2010) (8 pages) doi:10.1115/1.4000996 History: Received June 15, 2007; Revised October 29, 2009; Published August 17, 2010; Online August 17, 2010

The thermal, electrical, and fluid flow fields associated with a Siemens Power Generation Inc., Stationary Fuel Cells, flattened tubular high power density (HPD) solid oxide fuel cell (SOFC) were investigated comprehensively in a previous study. The present computational investigation is the subsequent part of an ongoing numerical pursuit at Siemens of an optimized cell geometry, commercialization of SOFC technology being the ultimate objective. A Delta type HPD cell featuring eight air channels was investigated and compared with a flattened tubular HPD cell. The computational models were developed using the commercial computational fluid dynamics software FLUENT 6.2 along with its SOFC user defined routine to model the electrochemical effects. The SOFC model parameters were derived from experimental data. The cathode, the anode, and the interconnection layers of the cell were resolved in the model and all modes of heat transfer, conduction, convection, and radiation were included. The resulting electrical performance and the thermal hydraulic characteristics of the cells for fully reformed natural gas fuel flow (reformed external to the cell) are presented and discussed. It was clear from these studies that the Delta HPD cell has distinct advantages over the flattened HPD cell in terms of system electrical performance as well as power density.

Copyright © 2010 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Siemens solid oxide fuel cell designs

Grahic Jump Location
Figure 3

CFD model and domain

Grahic Jump Location
Figure 4

Computational mesh

Grahic Jump Location
Figure 5

HPD5R1 CFD model and domain

Grahic Jump Location
Figure 6

HPD5R1 computational mesh

Grahic Jump Location
Figure 7

Comparison of HPD10 CFD model results with isothermal cell tests

Grahic Jump Location
Figure 8

Comparison of Delta 8 and HPD5R1 V-J at T=940°C

Grahic Jump Location
Figure 9

Comparison of Delta 8 and HPD5R1 V-I and cell power at T=940°C

Grahic Jump Location
Figure 10

Current density vectors in the air electrode colored by the corresponding voltage variation

Grahic Jump Location
Figure 11

Schematic of fuel flow path in a typical SOFC stack

Grahic Jump Location
Figure 12

Contours of temperature on the electrolyte face

Grahic Jump Location
Figure 13

Contours of current density on the electrolyte face

Grahic Jump Location
Figure 14

Contours of Nernst voltage on the electrolyte face

Grahic Jump Location
Figure 15

Variation in bulk temperature of air and average electrolyte temperature for the Delta 8 cell

Grahic Jump Location
Figure 16

Variation in bulk temperature of air and average electrolyte temperature for the HPD5R1 cell

Grahic Jump Location
Figure 17

Variation in O2 mole fractions within the AE at various elevations

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