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Model-Based System Performance Analysis of a Solid Oxide Fuel Cell System with Anode Off-Gas Recirculation

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  • Eun-Jung Choi

    (Department of Clean Fuel and Power Generation, Korea Institute of Machinery & Materials (KIMM), 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea)

  • Sangseok Yu

    (School of Mechanical Engineering, Chungnam University, 99, Daehak-ro, Yuseong-gu, Daejeon 34134, Korea)

  • Ji-Min Kim

    (School of Mechanical Engineering, Chungnam University, 99, Daehak-ro, Yuseong-gu, Daejeon 34134, Korea)

  • Sang-Min Lee

    (Department of Clean Fuel and Power Generation, Korea Institute of Machinery & Materials (KIMM), 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea)

Abstract

Designing proper solid oxide fuel cell (SOFC) system configurations is essential for their high efficiency. The present study analyzes the performance improvement of the SOFC system with anode off-gas recirculation (AOGR). Two AOGR configurations are suggested. Depending on the heat flows of off gases, the configurations are called AOGR #1 and #2, respectively. Additionally, a reference system is examined for comparison. This study aims to numerically evaluate the characteristics and performance of each system under various operating conditions such as fuel and air utilization factors. The operating current density and steam to carbon ratio are fixed at 0.3 A/cm 2 and 2.5, respectively. The results indicate that the system performance shows a large difference depending on the system configurations. The SOFC system with AOGR has better performance than the reference system under the operating conditions considered in this paper. However, it is also revealed that depending on the system configuration and operating conditions, AOGR can be effective or ineffective for system performance. Therefore, a deliberate operating strategy for AOGR systems needs to be developed based on the load conditions.

Suggested Citation

  • Eun-Jung Choi & Sangseok Yu & Ji-Min Kim & Sang-Min Lee, 2021. "Model-Based System Performance Analysis of a Solid Oxide Fuel Cell System with Anode Off-Gas Recirculation," Energies, MDPI, vol. 14(12), pages 1-22, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:12:p:3607-:d:576626
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    References listed on IDEAS

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    1. Wagner, Patrick Hubert & Wuillemin, Zacharie & Constantin, David & Diethelm, Stefan & Van herle, Jan & Schiffmann, Jürg, 2020. "Experimental characterization of a solid oxide fuel cell coupled to a steam-driven micro anode off-gas recirculation fan," Applied Energy, Elsevier, vol. 262(C).
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    4. Kim, Young Sang & Lee, Young Duk & Ahn, Kook Young, 2020. "System integration and proof-of-concept test results of SOFC–engine hybrid power generation system," Applied Energy, Elsevier, vol. 277(C).
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    Cited by:

    1. Chehrmonavari, Hamed & Kakaee, Amirhasan & Hosseini, Seyed Ehsan & Desideri, Umberto & Tsatsaronis, George & Floerchinger, Gus & Braun, Robert & Paykani, Amin, 2023. "Hybridizing solid oxide fuel cells with internal combustion engines for power and propulsion systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 171(C).
    2. Eun-Jung Choi & Sangseok Yu & Sang-Min Lee, 2022. "Optimization of Operating Conditions of a Solid Oxide Fuel Cell System with Anode Off-Gas Recirculation Using the Model-Based Sensitivity Analysis," Energies, MDPI, vol. 15(2), pages 1-13, January.

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