• Title/Summary/Keyword: Molten carbonate

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Generation characteristics of unit cell for MCFC (MCFC 의 단위전지 발전특성)

  • 김귀열;엄승욱;문성인;윤문수
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1995.05a
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    • pp.224-226
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    • 1995
  • Molten Carbonate Fuel Cell are expected as an electric and thermal power source of the urban cogenerating system because MCFC have higher electric power efficiency and better thermal power quality. This study has examined generation characteristics of unit cell for MCFC.

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Performance Design Analysis of Hybrid Systems Combining Atmospheric Pressure Molten Carbonate Fuel Cell and Gas Turbine (상압 용융탄산염 연료전지와 가스터빈을 결합한 하이브리드 시스템의 성능설계 해석)

  • Jeong, Young-Hyun;Kim, Tong-Soep
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.27 no.10
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    • pp.1361-1369
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    • 2003
  • Design performance of hybrid power generation systems, comprised of a gas turbine and an atmospheric pressure molten carbonate fuel cell, has been analyzed. Two different configurations were analyzed and performances were compared. A reference calculation was performed for the design condition of a system under development and simulated results agreed well with the published data. Performances were analyzed in terms of main design parameters including turbine inlet temperature, operating temperature of the fuel cell and pressure ratio. Also examined were the effects of fuel utilization factor and heat exchanger effectiveness. It was found that the relationship between the turbine inlet temperature and the fuel cell temperature should be critically examined to evaluate achievable design performance. Considering current state of the art technologies, a system with the combustor located before the turbine could achieve higher efficiency and specific power than the other system with the combustor located after the turbine.

Numerical Studies of Cell Temperature Distribution in MCFC Stack According to Electrical Loads (전기 부하에 따른 용융탄산염 연료전지 스택 온도 분포에 관한 수치 해석 연구)

  • Kim, Do-Hyung;Kim, Beom-Joo;Lee, Jung-Hyun;Kang, Seung-Won;Lim, Hee-Chun
    • Transactions of the Korean hydrogen and new energy society
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    • v.21 no.4
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    • pp.258-263
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    • 2010
  • A numerical stack model has been developed to predict the temperature at a constant-load operation of molten carbonate fuel cell stacks. For the validity of the model, the simulated results with several boundary conditions were compared in the cell temperature data obtained from 75 kW class MCFC stack operation. It was shown that the simulated results with the existing boundary condition, which the stack outlet temperature was fixed at $650^{\circ}C$, didn't match well with the measured data. On the other hand, the stack model with the outlet temperature modified by the outlet manifold temperature measured from the stack under several electric loads was found to explain the measured cell temperature distribution well. The results show that the model can be used to predict the cell temperature distribution in the stacks by the measurement of the manifold outlet temperature.

Performance Comparison of Molten Carbonate Fuel Cell Hybrid Systems Minimizing Carbon Dioxide Emissions (이산화탄소 배출을 최소화하는 용융탄산염 연료전지 하이브리드 시스템들의 성능 비교)

  • AHN, JI HO;YOON, SUK YOUNG;KIM, TONG SEOP
    • Transactions of the Korean hydrogen and new energy society
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    • v.28 no.1
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    • pp.30-39
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    • 2017
  • Interests in fuel cell based power generation systems are on the steady rise owing to various advantages such as high efficiency, ultra low emission, and potential to achieve a very high efficiency by a synergistic combination with conventional heat engines. In this study, the performance of a hybrid system which combined a molten carbonate fuel cell (MCFC) and an indirectly fired micro gas turbine adopting carbon dioxide capture technologies was predicted. Commercialized 2.5 MW class MCFC system was used as the based system so that the result of this study could reflect practicality. Three types of ambient pressure hybrid systems were devised: one adopting post-combustion capture and two adopting oxy-combustion capture. One of the oxy-combustion based system is configured as a semi-closed type, while the other is an open cycle type. The post-combustion based system exhibited higher net power output and efficiency than the oxy-combustion based systems. However, the semi-closed system using oxy-combustion has the advantage of capturing almost all carbon dioxide.

Development of 250kW Power Conditioning System for Molten Carbonate Fuel Cell Power Generation System (250kW급 용융탄산염 연료전지 발전시스템용 전력변환기 개발)

  • Lee, J.H.;Jung, H.J.;Baek, S.T.;Kang, H.H.;Chung, J.M.;Suh, I.Y.
    • Proceedings of the KIEE Conference
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    • 2007.04c
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    • pp.231-233
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    • 2007
  • 본 논문은 신 발전방식 중 하나인 용융탄산염형 연료전지(Molten Carbonate Fuel Cell, 이하 MCFC) 발전시스템에서 생성된 전력을 계통에 안정적으로 변환, 주입하기 위한 계통연계형 전력변환기를 설계, 제작하고 성능 시험을 수행한 결과이다. 250kW급 MCFC 시스템의 정격 사양 및 스택의 운전 형태를 기반으로 250kW급 전력변환기 구조 및 단위기기를 설계하였고 전력변환기는 크게 DC/DC 컨버터부와 DC/AC 인버터부로 구성된다. 본 논문은 MCFC 발전 시스템에 적용되는 전력변환기(Power Conditioning System, 이하 PCS)를 제작하고 성능을 확인하는데 목적이 있다.

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Performance Prediction and Economic Assessment of Atmospheric Pressure MCFC/Gas Turbine Hybrid System with Indirect Turbine Firing (터빈 간접가열식 상압형 MCFC/가스터빈 복합시스템의 성능예측과 경제성 평가)

  • Choi, Joo Hwan;Kim, Tong Seop;Kwak, Bu Ho
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.38 no.1
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    • pp.31-39
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    • 2014
  • The performance of fuel cell/gas turbine hybrid systems is highly affected by system configuration. In this study, the performance of a hybrid system combining a molten carbonate fuel cell (MCFC) and an indirectly fired gas turbine was predicted. Firstly, general performance trends of the hybrid system depending on major design parameters were examined. Then, the most feasible design options with the least impact on the MCFC stack design conditions were drawn. The economic advantage of the hybrid system over the basic MCFC only system was evaluated.