The effect of applied control strategy on the current-voltage correlation of a solid oxide fuel cell stack during dynamic operation

Janusz S. Szmyd, Yosuke Komatsu, Grzegorz Brus, Francesco Ghigliazza, Shinji Kimijima, Anna ͆ciązko

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This paper discusses the transient characteristics of the planar type SOFC cell stack, of which the standard output is 300 W. The transient response of the voltage to the manipulation of an electric current was investigated. The effects of the response and of the operating condition determined by the operating temperature of the stack were studied by mapping a current-voltage (I-V) correlation. The current-based fuel control (CBFC) was adopted for keeping the fuel utilization factor at constant while the value of the electric current was ramped at the constant rate. The present experimental study shows that the transient characteristics of the cell voltage are determined by primarily the operating temperature caused by the manipulation of the current. Particularly, the slope of the I-V curve and the overshoot found on the voltage was remarkably influenced by the operating temperature. The different values of the fuel utilization factor influence the height of the settled voltages. The CBFC has significance in determining the slope of the I-V characteristic, but the different values of the fuel utilization factor does not affect the slope as the operating tem-perature does. The CBFC essentially does not alter the amplitude of the overshoot on the voltage response, since this is dominated by the operating temperature and its change is caused by manipulating the current.

Original languageEnglish
Pages (from-to)129-143
Number of pages15
JournalArchives of Thermodynamics
Volume35
Issue number3
Publication statusPublished - 2014 Mar 1

Fingerprint

solid oxide fuel cells
fuel control
operating temperature
electric potential
slopes
electric current
manipulators
transient response
cells
output
curves

Keywords

  • Current-based fuel control
  • Dynamic operation
  • Fuel utilization factor
  • Solid oxide fuel cells
  • Stack operation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

The effect of applied control strategy on the current-voltage correlation of a solid oxide fuel cell stack during dynamic operation. / Szmyd, Janusz S.; Komatsu, Yosuke; Brus, Grzegorz; Ghigliazza, Francesco; Kimijima, Shinji; ͆ciązko, Anna.

In: Archives of Thermodynamics, Vol. 35, No. 3, 01.03.2014, p. 129-143.

Research output: Contribution to journalArticle

Szmyd, Janusz S. ; Komatsu, Yosuke ; Brus, Grzegorz ; Ghigliazza, Francesco ; Kimijima, Shinji ; ͆ciązko, Anna. / The effect of applied control strategy on the current-voltage correlation of a solid oxide fuel cell stack during dynamic operation. In: Archives of Thermodynamics. 2014 ; Vol. 35, No. 3. pp. 129-143.
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