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Multi-objective optimization and dynamic characteristic analysis of solid oxide fuel cell - Supercritical carbon dioxide brayton cycle hybrid system

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  • Wang, Di
  • Zhang, Yuxin
  • Sun, Lingfang
  • Han, Xinrui
  • Zhou, Yunlong
  • Wang, Yanhong
  • Sun, Lu

Abstract

Solid oxide fuel cells (SOFCs) are widely used in distributed power generation systems due to their high energy conversion efficiency, low emissions. Therefore, investigating the dynamic characteristics of fuel cell integration systems is significant for ensuring the efficient and stable operation of SOFC integrated systems. In this study, an SOFC integrated system with a supercritical CO2 Brayton cycle as the bottoming cycle is proposed. A dynamic model is established to investigate the dynamic characteristics of this system under optimal operating conditions. This integrated system is optimized from the perspectives of two objectives: energy conversion efficiency and operational cost. Using the Pareto frontier, the optimal solutions are a system electrical efficiency of 61.21 % and a total cost rate of 4583.8 $/hour. These optimized results are used as steady-state design points for the integrated system. At the steady-state design point, flow and voltage perturbation simulation experiments are conducted on the integrated system to analyze the dynamic characteristics of key system parameters. This study provides a theoretical foundation for the control structure design of SOFC integrated systems.

Suggested Citation

  • Wang, Di & Zhang, Yuxin & Sun, Lingfang & Han, Xinrui & Zhou, Yunlong & Wang, Yanhong & Sun, Lu, 2024. "Multi-objective optimization and dynamic characteristic analysis of solid oxide fuel cell - Supercritical carbon dioxide brayton cycle hybrid system," Energy, Elsevier, vol. 313(C).
    • Handle: RePEc:eee:energy:v:313:y:2024:i:c:s0360544224036934
    DOI: 10.1016/j.energy.2024.133915
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    References listed on IDEAS

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