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An optimal split ratio in design and control of a recompression supercritical CO2 Brayton system

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  • Wang, Rui
  • Wang, Xuan
  • Bian, Xingyan
  • Zhang, Xuanang
  • Cai, Jinwen
  • Tian, Hua
  • Shu, Gequn
  • Wang, Mingtao

Abstract

The sCO2 Brayton cycle is considered an alternative to the conventional Brayton and Rankine cycles. The recompression Brayton cycle is advantageous because of its simple cycle layout and high cycle efficiency. The split ratio (SR) is defined as the recompression fraction of the working fluid that significantly affects the corresponding parameters of the system, particularly the cycle efficiency. However, studies focusing on the influence of SR on the design and off-design performance remain limited. The factors influencing the optimal SR and regulation mechanism under the design and off-design conditions of recompression cycle are considered in this study. The results demonstrate that the optimal SR under the design conditions is primarily affected by the high pressure, low pressure and efficiency of the recuperators. The optimal SR decreases with a reduction in the load demand, and the recompression loop can be cut off under a low load to improve the cycle efficiency. A simplified control can be achieved by controlling the temperature difference at the flow merge point to achieve a higher system efficiency. Moreover, the SR regulation mechanism is unaffected by the load control method. These findings are of significance to recompression configuration with different design parameters.

Suggested Citation

  • Wang, Rui & Wang, Xuan & Bian, Xingyan & Zhang, Xuanang & Cai, Jinwen & Tian, Hua & Shu, Gequn & Wang, Mingtao, 2023. "An optimal split ratio in design and control of a recompression supercritical CO2 Brayton system," Energy, Elsevier, vol. 277(C).
    • Handle: RePEc:eee:energy:v:277:y:2023:i:c:s0360544223010708
    DOI: 10.1016/j.energy.2023.127676
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    References listed on IDEAS

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    1. Wang, Rui & Wang, Xuan & Shu, Gequn & Tian, Hua & Cai, Jinwen & Bian, Xingyan & Li, Xinyu & Qin, Zheng & Shi, Lingfeng, 2022. "Comparison of different load-following control strategies of a sCO2 Brayton cycle under full load range," Energy, Elsevier, vol. 246(C).
    2. Park, Joo Hyun & Park, Hyun Sun & Kwon, Jin Gyu & Kim, Tae Ho & Kim, Moo Hwan, 2018. "Optimization and thermodynamic analysis of supercritical CO2 Brayton recompression cycle for various small modular reactors," Energy, Elsevier, vol. 160(C), pages 520-535.
    3. Crespi, Francesco & Gavagnin, Giacomo & Sánchez, David & Martínez, Gonzalo S., 2017. "Supercritical carbon dioxide cycles for power generation: A review," Applied Energy, Elsevier, vol. 195(C), pages 152-183.
    4. Liu, Yaping & Wang, Ying & Huang, Diangui, 2019. "Supercritical CO2 Brayton cycle: A state-of-the-art review," Energy, Elsevier, vol. 189(C).
    5. Ma, Yuegeng & Morozyuk, Tatiana & Liu, Ming & Yan, Junjie & Liu, Jiping, 2019. "Optimal integration of recompression supercritical CO2 Brayton cycle with main compression intercooling in solar power tower system based on exergoeconomic approach," Applied Energy, Elsevier, vol. 242(C), pages 1134-1154.
    6. Mecheri, Mounir & Le Moullec, Yann, 2016. "Supercritical CO2 Brayton cycles for coal-fired power plants," Energy, Elsevier, vol. 103(C), pages 758-771.
    7. Correa, Faustino & Barraza, Rodrigo & Soo Too, Yen Chean & Vasquez Padilla, Ricardo & Cardemil, José M., 2021. "Optimized operation of recompression sCO2 Brayton cycle based on adjustable recompression fraction under variable conditions," Energy, Elsevier, vol. 227(C).
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    4. Ye, Jiedong & Huang, Jianxun & Du, Jiahao & Zheng, Dan & Gao, Xuan & Li, Haiwang & Xia, Yakang, 2025. "Multi-objective optimization of supercritical carbon dioxide Brayton cycles using Bayesian physics-informed neural networks: A comprehensive analysis of energy, exergy, economic, and environmental performance," Energy, Elsevier, vol. 339(C).
    5. Ma, Jiaxin & Zhao, Bingtao & Su, Yaxin, 2024. "Development of multilevel cascade layouts to improve performance of SCO2 Brayton power cycles: Design, simulation, and optimization," Energy, Elsevier, vol. 308(C).
    6. Bian, Xingyan & Wang, Xuan & Wang, Jingyu & Wang, Rui & Zhang, Xuanang & Tian, Hua & Shu, Gequn, 2024. "Transcritical CO2 mixture power for nuclear plant application: Concept and thermodynamic optimization," Energy, Elsevier, vol. 309(C).
    7. Qin, Tianyang & Sun, Yuwei & Yan, Xinping & Yuan, Chengqing, 2025. "Load-following operation of supercritical CO2 power cycles under turbine speed control with different shaft configurations," Energy, Elsevier, vol. 328(C).
    8. Xing, Jiajing & Li, Chengyu & Wang, Youtang & He, Fang, 2025. "A comparative study on effectiveness method and pinch analysis method in the thermodynamic investigation of supercritical CO2 power cycle," Energy, Elsevier, vol. 341(C).
    9. Liu, Huawei & Zhang, Yongqing & Xu, Qianghui & Han, Wei & Shen, Jun, 2025. "A Carnot battery system integrating ca(OH)2/CaO thermochemical energy storage and supercritical CO2 cycles for long-term energy storage and residential heat supply," Applied Energy, Elsevier, vol. 377(PB).

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