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Numerical and Thermodynamic Analysis of the Effect of Operating Temperature in Methane-Fueled SOFC

Author

Listed:
  • Berre Kumuk

    (Automotive Technologies Program Iskenderun Vocational School of Higher Education, Iskenderun Technical University, Hatay 31200, Türkiye)

  • Nisa Nur Atak

    (Energy Systems Engineering, Faculty of Technology, Gazi University, Ankara 06330, Türkiye)

  • Battal Dogan

    (Energy Systems Engineering, Faculty of Technology, Gazi University, Ankara 06330, Türkiye)

  • Salih Ozer

    (Mechanical Engineering, Mus Alparslan University, Mus 49210, Türkiye)

  • Pinar Demircioglu

    (Institute of Materials Science, TUM School of Engineering and Design, Technical University of Munich, 85748 Garching, Germany
    Mechanical Engineering Department, Engineering Faculty, Aydin Adnan Menderes University, Aydin 09100, Türkiye)

  • Ismail Bogrekci

    (Mechanical Engineering Department, Engineering Faculty, Aydin Adnan Menderes University, Aydin 09100, Türkiye)

Abstract

This study examines the thermodynamic and numerical analyses of a methane-fed solid oxide fuel cell (SOFC) over a temperature range varying between 873 K and 1273 K. These analyses were conducted to investigate and compare the performance of the SOFC under various operating conditions in detail. As part of the thermodynamic analysis, important parameters such as cell voltage, power density, exergy destruction, entropy generation, thermal efficiency, and exergy efficiency were calculated. These calculations were used to conduct energy and exergy analyses of the cell. According to the findings, an increase in operating temperature led to a significant improvement in performance. At the initial conditions where the SOFC operated at a temperature of 1073 K and a current density of 9000 A/m 2 , it was observed that when the temperature increased by 200 K while keeping the current density constant, the power density increased by a factor of 1.90 compared to the initial state, and the thermal efficiency increased by a factor of 1.45. Under a constant current density, the voltage and power density values were 1.0081 V, 1.0543 V, 2337.13 W/m 2 , and 2554.72 W/m 2 at operating temperatures of 1073 K and 1273 K, respectively. Under a current density of 4500 A/m 2 , the entropy generation in the cell was determined to be 29.48 kW/K at 973 K and 23.68 kW/K at 1173 K operating temperatures. The maximum exergy efficiency of the SOFC was calculated to be 41.67% at a working temperature of 1273 K and a current density of 1500 A/m 2 . This study is anticipated to be highly significant, as it examines the impact of temperature variation on exergy analysis in SOFC, validating both numerical and theoretical results, thus providing a crucial roadmap for determining optimized operating conditions.

Suggested Citation

  • Berre Kumuk & Nisa Nur Atak & Battal Dogan & Salih Ozer & Pinar Demircioglu & Ismail Bogrekci, 2024. "Numerical and Thermodynamic Analysis of the Effect of Operating Temperature in Methane-Fueled SOFC," Energies, MDPI, vol. 17(11), pages 1-17, May.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:11:p:2603-:d:1403784
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    References listed on IDEAS

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    1. Lei, Libin & Keels, Jayson M. & Tao, Zetian & Zhang, Jihao & Chen, Fanglin, 2018. "Thermodynamic and experimental assessment of proton conducting solid oxide fuel cells with internal methane steam reforming," Applied Energy, Elsevier, vol. 224(C), pages 280-288.
    2. E. Perry Murray & T. Tsai & S. A. Barnett, 1999. "A direct-methane fuel cell with a ceria-based anode," Nature, Nature, vol. 400(6745), pages 649-651, August.
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