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

  • 제30권4호
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  • Pages.303-311
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  • 2019
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
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연료 재순환 이젝터를 이용한 연료전지-폐기물 기반 가역 고체 산화물 연료전지의 최적 설계

Optimal Design of RSOFC System Coupled with Waste Steam Using Ejector for Fuel Recirculation

  • 잡반티엔 (과학기술연합대학원대학교 환경에너지기계공학) ;
  • 이영덕 (과학기술연합대학원대학교 환경에너지기계공학) ;
  • 김영상 (한국기계연구원 청정연료발전연구실) ;
  • 쿠엔 (과학기술연합대학원대학교 환경에너지기계공학) ;
  • 안국영 (과학기술연합대학원대학교 환경에너지기계공학)
  • GIAP, VAN-TIEN (Department of Environment & Energy Mechanical Engineering, University of Science and Technology (UST)) ;
  • LEE, YOUNG DUK (Department of Environment & Energy Mechanical Engineering, University of Science and Technology (UST)) ;
  • KIM, YOUNG SANG (Department of Clean Fuel & Power Generation, Korea Institute of Machinery & Materials (KIMM)) ;
  • QUACH, THAI QUYEN (Department of Environment & Energy Mechanical Engineering, University of Science and Technology (UST)) ;
  • AHN, KOOK YOUNG (Department of Environment & Energy Mechanical Engineering, University of Science and Technology (UST))
  • 투고 : 2019.07.24
  • 심사 : 2019.08.31
  • 발행 : 2019.08.31
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초록

Reversible solid oxide fuel cell (RSOFC) has become a prospective device for energy storage and hydrogen production. Many studies have been conducted around the world focusing on system efficiency improvement and realization. The system should have not only high efficiency but also a certain level of simplicity for stable operation. External waste steam utilization was proved to remarkably increase the efficiency at solid oxide electrolysis system. In this study, RSOFC system coupled with waste steam was proposed and optimized in term of simplicity and efficiency. Ejector for fuel recirculation is selected due to its simple design and high stability. Three system configurations using ejector for fuel recirculation were investigated for performance of design condition. In parametric study, the system efficiencies at different current density were analyzed. The system configurations were simulated using validated lumped model in EBSILON(R) program. The system components, balance of plants, were designed to work in both electrolysis and fuel cell modes, and their off-design characteristics were taken into account. The base case calculation shows that, the system with suction pump results in slightly lower efficiency but stack can be operated more stable with same inlet pressure of fuel and air electrode.

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참고문헌

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