The impact of flow distributors on the performance of planar solid oxide fuel cell

C. M. Huang, S. S. Shy, H. H. Li, C. H. Lee

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

This paper presents a newly established testing rig for planar solid oxide fuel cell. Two sets of nearly identical single-cell stacks except using different designs of flow distributors are measured to show how exactly the cell performance of such single-cell stacks would vary with a change in the degree of flow uniformity. It is found that by using small guide vanes around the feed header of commonly used rib-channel flow distributors to improve effectively the degree of flow uniformity, the power density of the single-cell stack can be increased by 10% as compared to that without using guide vanes under exactly the same experimental conditions. Also discussed are the start-up procedure and effects of hydrogen and air flow rates varying from 0.4 slpm to 1 slpm on cell performance of these two single-cell stacks which are measured over a range of the operating temperature varying from 650 °C to 850 °C. After 100 h of continuous cell operation, the examination of the reduction and oxidation stability of the anodic surface reveals that the improvement of flow uniformity in flow distributors is useful to achieve a more balanced use of the anodic catalyst.

Original languageEnglish
Pages (from-to)6280-6286
Number of pages7
JournalJournal of Power Sources
Volume195
Issue number19
DOIs
StatePublished - 1 Oct 2010

Keywords

  • Anodic re-oxidation
  • Cell performance measurements
  • Flow distributors
  • Flow uniformity
  • Planar solid oxide fuel cell
  • Single-cell stack test

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