Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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The Ejector Design and Test for 125 kW Class Molten Carbonate Fuel Cell System

125 kW급 용융탄산염 연료전지 시스템의 이젝터 설계 및 시험

  • KIM, BEOMJOO (Korea Electric Power Corporation Research Institute) ;
  • PARK, SOO-MAN (Korea Electric Power Corporation Research Institute) ;
  • SONG, OH-SEOP (Department of Mechanical Engineering, Chungnam National University)
  • 김범주 (한국전력공사 전력연구원) ;
  • 박수만 (한국전력공사 전력연구원) ;
  • 송오섭 (충남대학교 기계공학과)
  • Received : 2018.01.29
  • Accepted : 2018.04.30
  • Published : 2018.04.30
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Abstract

Korea Electric Power Research Institute (KEPCO RI) had developed molten carbonate fuel cell (MCFC) system since 1993. Finally, KEPCO RI developed and operated a 125 kW MCFC system in 2010. To make MCFC system compact, it is indispensable to install an ejector in this system where the anode off gas, the cathode off gas, and fresh air are mixed before flowing to the catalytic burner. KEPCO RI had developed various ejectors for MCFC system since 2006. The 125 kW MCFC system built with the developed ejector was operated successfully in Boryeong Thermal Power Plant in 2010. This 125 kW MCFC ejector was designed on the basis of the experimental results of 5 kW and 75 kW MCFC ejectors. The main goal of ejector design in our MCFC system is to maintain the entrainment ratio and the pressure between fuel cell stack and catalytic burner within the operating range. In this paper, the design results of the ejector are presented based on the 125 kW MCFC system operating conditions. In addition, a designed ejector was manufactured and installed in the MCFC system. As the fuel cell is under load operation, the pressure surrounding the ejector was measured to ensure that the fuel cell system is operating smoothly.

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References

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