13. The Effect of Inverter Ripple on Solid Oxide Fuel Cell Performance

  1. Narottam P. Bansal
  1. Christopher Johnson and
  2. Randall Gemmen

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291245.ch13

Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4

Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4

How to Cite

Johnson, C. and Gemmen, R. (2005) The Effect of Inverter Ripple on Solid Oxide Fuel Cell Performance, in Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4 (ed N. P. Bansal), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291245.ch13

Author Information

  1. US Department of Energy National Energy Technology Laboratory Morgantown, WV 26505-0880

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982343

Online ISBN: 9780470291245

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Keywords:

  • oscillations;
  • transient conditions;
  • anoddelectrolyte;
  • platinum

Summary

The effect of inverter ripple (feedback on a fuel cell from the DC to AC inverter) current on solid oxide fuel cell performance is not well understood. At NETL, both models and experimental work are being pursued to try and understand the effect of inverter ripple on cell performance. The modeling work has led us to speculate that large oscillations in voltage due to the inverter may have deleterious effects on cell performance and lifetimes. Results showed the behavior of the reactant concentrations within the stack electrodes under inverter loads with frequencies between 60 Hz and 1250 Hz. The conclusion was that due to the fluctuating reactant concentrations, temporary conditions (on the order of the frequency of ripple) would occur where the concentration of H2 at the anode/electrolyte interface varied significantly from the average value. Since much work in the development of fuel cells relies on steady state test data, concern is raised that final operation on an inverter would have significantly different performance results. Here we report the results of experimental tests of the effect of ripple on solid oxide fuel cells. Data was acquired over several weeks on the performance of an individual cell while being exposed to 30% ripple current at a frequency of 60Hz. No degradation that could be attributed to inverter ripple was detected over the period of testing.