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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Operation Results of a 5kW-Class SOFC System Composed of 2 Sub-Module Stacks

2 모듈 스택을 이용한 5kW급 SOFC 시스템 운전결과

  • Lee, Tae-Hee (Green Growth Technology Laboratory, KEPCO Research Institute) ;
  • Choi, Mi-Hwa (Green Growth Technology Laboratory, KEPCO Research Institute) ;
  • Yoo, Young-Sung (Green Growth Technology Laboratory, KEPCO Research Institute)
  • 이태희 (한전전력연구원 녹색성장연구소) ;
  • 최미화 (한전전력연구원 녹색성장연구소) ;
  • 유영성 (한전전력연구원 녹색성장연구소)
  • Received : 2011.06.22
  • Accepted : 2011.10.21
  • Published : 2011.10.30

Abstract

A 5 kW class SOFC system for cogeneration power units was consisted of a hot box part and cold BOPs. High temperature components such as a stack, a fuel reformer, a catalytic combustor, and heat exchanges are arranged in the bot box considering their operating temperatures for the system efficiency. The hot box was made of ceramic boards for the thermal insulation. A 5 kW class SOFC stack was composed of 2 sub-modules and each module had 64 cells with $15{\times}15cm^2$ area and stainless steel interconnects. The 5 kW class SOFC system was operated with a hydrogen and a city gas. With a hydrogen, the total power of the stacks was about 7.1 kWDC and electrical efficiency was about 49.3% at 80 A. With a city gas, the total power of the stacks was about 5.7 $kW_{DC}$ and electrical efficiency was about 38.8% at 60 A. Under self-sustained operating condition, the system efficiency including a power conditioning loss and a consumed power by BOPs was about 30.2%.

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Acknowledgement

Grant : 5kW급 열병합 고체산화물 연료전지 발전시스템 개발

Supported by : 한국에너지기술평가원(KETEP)

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