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Study on Internal Reforming Characteristic of 1 kW Solid Oxide Fuel Cell Stack

1 kW 고체산화물 연료전지 스택의 내부개질 특성 연구

  • CHOI, YOUNGJAE (Energy Materials Research Group, Research Institute of Industrial Science & Technology (RIST)) ;
  • AHN, JINSOO (Energy Materials Research Group, Research Institute of Industrial Science & Technology (RIST)) ;
  • LEE, INSUNG (PG-NCM PJT Team, Research Institute of Industrial Science & Technology (RIST)) ;
  • BAE, HONGYOUL (Energy Materials Research Group, Research Institute of Industrial Science & Technology (RIST)) ;
  • MOON, JIWOONG (Energy Materials Research Group, Research Institute of Industrial Science & Technology (RIST)) ;
  • LEE, JONGGYU (Climate and Energy Research Group, Research Institute of Industrial Science & Technology (RIST))
  • 최영재 ((재)포항산업과학연구원 에너지소재연구그룹) ;
  • 안진수 ((재)포항산업과학연구원 에너지소재연구그룹) ;
  • 이인성 ((재)포항산업과학연구원 PG-NCM PJT팀) ;
  • 배홍열 ((재)포항산업과학연구원 에너지소재연구그룹) ;
  • 문지웅 ((재)포항산업과학연구원 에너지소재연구그룹) ;
  • 이종규 ((재)포항산업과학연구원 기후에너지연구그룹)
  • Received : 2017.07.09
  • Accepted : 2017.08.30
  • Published : 2017.08.30

Abstract

This paper presents the performance characteristics of a 1 kW solid oxide fuel cell (SOFC) stack under various internal reforming and fuel utilization conditions. The Research Institute of Industrial Science & Technology (RIST) developed the 9-cell stack using a $20{\times}20cm^2$ anode supported planar cell with an active area of $324cm^2$. In this work, current-voltage characteristic test, fuel utilization test, continuous operation, and internal reforming test were carried out sequentially for 765 hours at a furnace temperature of $700^{\circ}C$. The influence of fuel utilization and internal reforming on the stack performance was analyzed. When the 1 kW stack was tested at a current of 145.8 A with a corresponding fuel utilization of 50-70% (internal reforming of 50%) and air utilization of 27%, the stack power was approximately 1.062-1.079 kW. Under continuous operation conditions, performance degradation rate was 2.16%/kh for 664 hours. The internal reforming characteristics of the stack were measured at a current of 145.8. A with a corresponding fuel utilization of 60-75%(internal reforming of 50-80%) and air utilization of 27%. As fuel utilization and internal reforming ratio increased, the stack power was decreased. The stack power change due to the internal reforming ratio difference was decreased with increasing fuel utilization.

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

References

  1. J. H. Hirschenhofer, D. B. Stauer, R. R. Engleman, and M. G. Klett, "Fuel cell handbook", 4th ed., Parsons Corperation Reading P.A for U.S. Department of Energy. 1998.
  2. R. O'Hayre, J. W. Cha, W. Colella, and F. B. Prinz, "Fuel cell fundamentals", 2nd ed., John Wiley & Sons, New York. 2008.
  3. N. Laosiripojana and S. Assabumrungrat, "Catalytic steam reforming of methane, methanol and ethanol over Ni/YSZ: the possible use of these fuels in internal reforming SOFC", J. Power Sources, Vol. 163, 2007, pp. 943-951. https://doi.org/10.1016/j.jpowsour.2006.10.006
  4. G. J. Saunders and K. Kendall, "Reactions of hydrocarbons in small tubular SOFCs", J. Power Sources, Vol. 106, 2002, pp. 258-263. https://doi.org/10.1016/S0378-7753(01)01067-9
  5. A. Lanzini and P. Leone, "Experimental investigation of direct internal reforming of biogas in solid oxide fuel cells", Int. J. Hydrogen Energy, Vol. 35, No. 6, 2010, pp. 2463-2476. https://doi.org/10.1016/j.ijhydene.2009.12.146
  6. Y. Shiratori, T. Oshima, and K. Sasaki, "Feasibility of direct-biogas SOFC", Int. J. Hydrogen Energy, Vol. 33, No. 21, 2008, pp. 6316-6321. https://doi.org/10.1016/j.ijhydene.2008.07.101
  7. Y. Shiratori, T. Ijichi, T. Oshima, and K. Sasaki, "Internal reforming SOFC running on biogas", Int. J. Hydrogen Energy, Vol. 35, No. 15, 2010, pp. 7905-7912. https://doi.org/10.1016/j.ijhydene.2010.05.064