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Volume 29 Issue 6
 
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2021  >  29(6): 659-666
WANG Jia-bin, XU Hu, DONG Ping, GUO Zhao-yuan, ZHENG Qun. Optimization for Design of SOFC and Helium Xenon Brayton Double-Closed Cycle Combined Power System Based on Metal Fuel[J]. Journal of Unmanned Undersea Systems, 2021, 29(6): 659-666. doi: 10.11993/j.issn.2096-3920.2021.06.003
Citation: WANG Jia-bin, XU Hu, DONG Ping, GUO Zhao-yuan, ZHENG Qun. Optimization for Design of SOFC and Helium Xenon Brayton Double-Closed Cycle Combined Power System Based on Metal Fuel[J]. Journal of Unmanned Undersea Systems, 2021, 29(6): 659-666. doi: 10.11993/j.issn.2096-3920.2021.06.003
shu

Optimization for Design of SOFC and Helium Xenon Brayton Double-Closed Cycle Combined Power System Based on Metal Fuel

doi: 10.11993/j.issn.2096-3920.2021.06.003
  • 1.

    School of Power and Energy Engineering, Harbin Engineering University, Harbin 150000, China

  • 2.

    The 705 Research Institute, China State Shipbuilding Corporation Limited, Xi’an 710077, China

  • Received Date: 2021-08-24
  • Rev Recd Date: 2021-11-01
  • Publish Date: 2021-12-31
    Abstract
  • To improve the thermal efficiency and duration of an air-independent propulsion power system, a double-closed cycle combined power system is proposed, which is based on the aluminum–water reaction and consists of a closed helium-xenon Brayton cycle and a closed solid oxide fuel cell(SOFC) system. A mathematical model of the system is established, and the output power is fixed at 100 kW. By analyzing the sensitivity influence of the main parameters of the system, it is found that the working temperature and pressure of the SOFC and the compressor pressure ratio of the Brayton cycle have a certain promotion effect on the output power of the system. The research found that increasing the working temperature and pressure of the SOFC increases the thermal efficiency and power sharing ratio of the SOFC system, and also influences the same parameters of the Brayton system. The research also found that increasing the pressure ratio increases the power sharing ratio of the Brayton cycle, increases the thermal efficiency of the SOFC system first and then decreases it, and the thermal efficiency peaks through variations in the compressor ratio. After optimization of the genetic algorithm, the thermal efficiency of the double-closed cycle combined power system is 2.53% higher than that of the prototype design, and the exergy efficiency is 2.55% higher than that of the prototype design. The thermal efficiency of the system is effectively improved.

     

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