Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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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.

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Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

References

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