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System Performance Analyses of Supercritical CO 2 Brayton Cycle for Sodium-Cooled Fast Reactor

Author

Listed:
  • Min Xie

    (HE National Engineering Research Center of Power Generation Equipment, Harbin 150028, China)

  • Jian Cheng

    (Harbin Electric International Company Limited, Harbin 150028, China)

  • Xiaohan Ren

    (Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China)

  • Shuo Wang

    (State Key Laboratory of Efficient and Clean Coal-Fired Utility Boilers, Harbin Boiler Company Limited, Harbin 150046, China)

  • Pengcheng Che

    (HE National Engineering Research Center of Power Generation Equipment, Harbin 150028, China)

  • Chunwei Zhang

    (HE National Engineering Research Center of Power Generation Equipment, Harbin 150028, China)

Abstract

The system performance of the supercritical CO 2 Brayton cycle for the Sodium Fast Reactor with a partial-cooling layout was studied, and an economic analysis was carried out. The energetic, exergetic, and exergoeconomic analyses are presented, and the optimized results were compared with the recompression cycle. The sensitivity analyses were conducted by considering the variations in the pressure ratios and inlet temperatures of the main compressor and the turbine. The exergy efficiency of the partial-cooling cycle reached 63.65% with a net power output of 34.39 MW via optimization. The partial-cooling cycle obtained a minimum total cost rate of 2230.36 USD/h and exergy efficiency of 63.65% when the pressure ratio was equal to 3.50. The inlet temperature of the main compressor was equal to 35 °C, and the inlet temperature of the turbine was equal to 480 °C. The total cost of recuperators decreased with the increase in the pressure ratio and the inlet temperatures of the main compressor. In addition, the total cost of recuperator could be reduced by increasing the outlet temperature of the turbine. The change in cost from exergy loss and destruction with the pressure ratio was substantially larger than with the inlet temperature of the turbine or the main compressor. Manipulating the pressure ratio is an essential method to guarantee good economy of the system. Moreover, capital investment, operation, and maintenance costs normally accounted for large proportions of the total cost rate, being almost double the cost from the exergy loss and destruction occurring in each condition.

Suggested Citation

  • Min Xie & Jian Cheng & Xiaohan Ren & Shuo Wang & Pengcheng Che & Chunwei Zhang, 2022. "System Performance Analyses of Supercritical CO 2 Brayton Cycle for Sodium-Cooled Fast Reactor," Energies, MDPI, vol. 15(10), pages 1-19, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:10:p:3555-:d:814159
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    References listed on IDEAS

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