0
RESEARCH PAPERS

Experimental Analysis of the Voltage and Temperature Behavior of a Solid Oxide Fuel Cell Generator

[+] Author and Article Information
M. G. Santarelli

Dipartimento di Energetica Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italymassimo.santarelli@polito.it

P. Leone

Dipartimento di Energetica Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italypierluigi.leone@polito.it

M. Cali

Dipartimento di Energetica Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italymichele.cali@polito.it

G. Orsello

 Gas Turbine Technologies S.p.A., Corso Romania 661, 10156 Torino, Italygianmichele.orsello@siemens.com

J. Fuel Cell Sci. Technol 4(2), 143-153 (Oct 02, 2006) (11 pages) doi:10.1115/1.2713772 History: Received June 21, 2006; Revised October 02, 2006

A solid oxide fuel cell (SOFC) laboratory has been installed in Torino, Italy, in order to analyze the operation, in a cogenerative configuration, of the CHP-100 SOFC Field Unit built by Siemens Power Corporation (SPG) Stationary Fuel Cells (SFC), within the framework of the EOS Project. An experimental session was performed, varying the setpoint temperature TGEN and the fuel consumption (FC), with the aim of characterizing the behaviour of the local voltages and temperatures. A design of experiments procedure was applied to obtain first (simple 22) and second-order (spherical central composite design (CCD)) regression models, which were then used in subsequent constrained optimization procedures. A sensitivity analysis was also performed: FC revealed as the prevailing control factor of the operation, and it was shown that the analysis of the local voltage and temperature sensitivity to FC can be used as a diagnostic tool for the fuel distribution within a SOFC generator (the homogeneity of the sensitivity of the various cells was 10%, depending strongly on the cell bundle arrangement in the stack). Finally, the effect of any changes in the control factors on the tube temperature profile was evaluated and discussed; a link between a high terminal voltage and a more uniform temperature along the cell tube has been pointed out.

FIGURES IN THIS ARTICLE
<>
Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Picture of the generator skid before installation (courtesy of GTT)

Grahic Jump Location
Figure 2

Schematic view of the generator structure

Grahic Jump Location
Figure 3

Normal probability plot of the VGen data

Grahic Jump Location
Figure 4

Contour plot obtained using the first-order regression model of the VGen data

Grahic Jump Location
Figure 5

Effect of the fuel utilization (FU) on the open circuit voltage (at air stoichiometry 5)

Grahic Jump Location
Figure 6

Normal probability plot of the TCZ,max data

Grahic Jump Location
Figure 7

Contour plot obtained using the first-order regression model of the TCZ,max data

Grahic Jump Location
Figure 8

Axial temperature profile of a singular tube at different FC (x=0 top of the tube, or open end)

Grahic Jump Location
Figure 9

Axial temperature profile of a singular tube at different TGen (x=0 top of the tube, or open end)

Grahic Jump Location
Figure 10

Sensitivity of the local voltage to FC modification in relation to the local temperatures

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