S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Mechanical Aerospace Engineering (기계항공공학부) Theses (Master's Degree_기계항공공학부)
A novel fuel cell-IC engine hybrid system for distributed power generation : 분산 발전을 위한 새로운 연료 전지- IC 엔진 하이브리드 시스템
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- Song, Seung Jin
- Issue Date
- 서울대학교 대학원
- 학위논문 (석사)-- 서울대학교 대학원 : 기계항공공학부, 2012. 2. Song, Seung Jin.
- A novel molten carbonate fuel cell (MCFC) and homogenous charge compression ignition (HCCI) engine hybrid system is suggested that replaces the catalytic burner in standalone fuel cell system, with an HCCI engine to improve the overall system efficiency. HCCI engine is chosen over conventional spark-ignition or compression-ignition engines as it has been shown to operate with the extremely fuel-lean mixture, which is the case with MCFC anode off-gas. A non-isothermal numerical model that incorporates major fuel cell losses is developed to predict fuel cell performance. The fuel cell model assumes parallel anode and cathode flow configuration with LiNaCO3 as electrolyte. It is then integrated with an in-house HCCI engine model to investigate hybrid system performance. At the selected design point operation, the maximum hybrid system efficiency is almost 28% (relative) higher than that of standalone fuel cell system, which demonstrates the potential of the hybrid system as a highly-efficient distributed power generation source in the near-future.
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