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A comprehensive evaluation of the effect of different control valves on the dynamic performance of a recompression supercritical CO2 Brayton cycle

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  • Bian, Xingyan
  • Wang, Xuan
  • Wang, Rui
  • Cai, Jinwen
  • Tian, Hua
  • Shu, Gequn
  • Lin, Zhimin
  • Yu, Xiangyu
  • Shi, Lingfeng

Abstract

Supercritical CO2 Brayton cycle (SCBC) is regarded as one of the most promising power cycles due to its compactness and high efficiency. Considering the safe operation and the rapidly load tracking, the valve control is used to investigate the dynamic performance of the SCBC. Therefore, this paper establishes a dynamic model of a recompression SCBC and puts forwards five kinds of control valves to investigate and compare the influence of different control valves on the open-loop dynamic performance of the system from the thermodynamic response characteristics and the safety performance evaluation. The simulation results indicate that the turbine bypass valve and the HTR bypass valve have a better load regulation capability compared with the other valves: load rates of 40.87% and 52.33% can be achieved when the valve opening is reduced to 50%, respectively. Besides, the two valves allow for timely tracking and maintain safe system operation simultaneously with up to two additional controllers. Moreover, the system under the turbine bypass valve control has the fastest response compared with that under the control of turbine throttle valve and HTR bypass valve.

Suggested Citation

  • Bian, Xingyan & Wang, Xuan & Wang, Rui & Cai, Jinwen & Tian, Hua & Shu, Gequn & Lin, Zhimin & Yu, Xiangyu & Shi, Lingfeng, 2022. "A comprehensive evaluation of the effect of different control valves on the dynamic performance of a recompression supercritical CO2 Brayton cycle," Energy, Elsevier, vol. 248(C).
    • Handle: RePEc:eee:energy:v:248:y:2022:i:c:s0360544222005333
    DOI: 10.1016/j.energy.2022.123630
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    References listed on IDEAS

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    1. Zhang, Yifan & Li, Hongzhi & Li, Kailun & Yang, Yu & Zhou, Yujia & Zhang, Xuwei & Xu, Ruina & Zhuge, Weilin & Lei, Xianliang & Dan, Guangju, 2022. "Dynamic characteristics and control strategies of the supercritical CO2 Brayton cycle tailored for the new generation concentrating solar power," Applied Energy, Elsevier, vol. 328(C).
    2. Du, Yadong & Yang, Ce & Zhao, Ben & Gao, Jianbing & Hu, Chenxing & Zhang, Hanzhi & Zhao, Wei, 2022. "Dynamic characteristics of a recompression supercritical CO2 cycle against variable operating conditions and temperature fluctuations of reactor outlet coolant," Energy, Elsevier, vol. 258(C).
    3. Lu, Bowen & Zhang, Zhifu & Cai, Jinwen & Wang, Wei & Ju, Xueming & Xu, Yao & Lu, Xun & Tian, Hua & Shi, Lingfeng & Shu, Gequn, 2023. "Integrating engine thermal management into waste heat recovery under steady-state design and dynamic off-design conditions," Energy, Elsevier, vol. 272(C).
    4. Qiu, Leilei & Liao, Shengyong & Fan, Sui & Sun, Peiwei & Wei, Xinyu, 2023. "Dynamic modelling and control system design of micro-high-temperature gas-cooled reactor with helium brayton cycle," Energy, Elsevier, vol. 278(PB).
    5. Dang, Chaolei & Cheng, Kunlin & Fan, Junhao & Wang, Yilin & Qin, Jiang & Liu, Guodong, 2023. "Performance analysis of fuel vapor turbine and closed-Brayton-cycle combined power generation system for hypersonic vehicles," Energy, Elsevier, vol. 266(C).

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