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Numerical Study on Effects of Flow Channel Length on Solid Oxide Fuel Cell-Integrated System Performances

Author

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  • Yuhang Liu

    (Mechanical and Electrical Engineering College, Hainan University, Haikou 570228, China)

  • Jinyi Liu

    (Mechanical and Electrical Engineering College, Hainan University, Haikou 570228, China
    Collaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, China)

  • Lirong Fu

    (Mechanical and Electrical Engineering College, Hainan University, Haikou 570228, China
    Collaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, China)

  • Qiao Wang

    (Mechanical and Electrical Engineering College, Hainan University, Haikou 570228, China)

Abstract

The structural dimensions of the SOFC have an important influence on the solid oxide fuel cell (SOFC)-integrated system performance. The paper focuses on analyzing the effect of the flow channel length on the integrated system. The system model includes a 3-D SOFC model, established using COMSOL 6.1, and a 1-D model of the SOFC-integrated system established, using Aspen Plus V11. This analysis was conducted within an operating voltage range from 0.4 V to 0.9 V and flow channel length range from 6 cm to 18 cm for the SOFC-integrated system model. Performance evaluation indicators for integrated systems are conducted, focusing on three aspects: net electrical power, net electrical efficiency, and thermoelectric efficiency. The purpose of the paper is to explore the optimal flow channel length of SOFC in the integrated system. The results indicate that there is inevitably an optimal length in the integrated system at which both the net electrical power and net electrical efficiency reach their maximum values. When considering the heat recycling in the system, the integrated system with a flow channel length of 16 cm achieves the highest thermoelectric efficiency of 65.68% at 0.7 V. Therefore, there is a flow channel length that allows the system to achieve the highest thermoelectric efficiency. This study provides optimization ideas for the production and manufacturing of SOFCs from the perspective of practical engineering applications.

Suggested Citation

  • Yuhang Liu & Jinyi Liu & Lirong Fu & Qiao Wang, 2024. "Numerical Study on Effects of Flow Channel Length on Solid Oxide Fuel Cell-Integrated System Performances," Sustainability, MDPI, vol. 16(4), pages 1-22, February.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:4:p:1643-:d:1340023
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    References listed on IDEAS

    as
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