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Comparison of different load-following control strategies of a sCO2 Brayton cycle under full load range

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  • Wang, Rui
  • Wang, Xuan
  • Shu, Gequn
  • Tian, Hua
  • Cai, Jinwen
  • Bian, Xingyan
  • Li, Xinyu
  • Qin, Zheng
  • Shi, Lingfeng

Abstract

The supercritical CO2 Brayton cycle has been regarded as a promising next-generation power conversion system owing to its flexibility and high efficiency. Dynamic performance and control strategy are essential research topics when systems are subjected to various load demands. Inventory control has been proven as a very effective load control method and valve controls have the potential to meet wider load demands. While few studies have focused on the differences in efficiency and system performance under different control strategies. In this study, a dynamic model of recompression supercritical CO2 Brayton cycle is proposed, and its components are carefully validated. Moreover, an inventory and anti-surge coupled control strategy is proposed to achieve better control performance. Under the premise of considering system security, various control strategies meeting 0%–100% load range are compared. The primary objective of this study is to reveal the differences in efficiency and dynamic performance of various control strategies in the full load range, to provide a basis for the selection of control strategies in off-design conditions. The results demonstrate that inventory and anti-surge coupled control allow safe tracking loads as low as 0%, and it provided an absolute advantage in terms of efficiency compared to valve controls.

Suggested Citation

  • 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).
    • Handle: RePEc:eee:energy:v:246:y:2022:i:c:s036054422200281x
    DOI: 10.1016/j.energy.2022.123378
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    References listed on IDEAS

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    Cited by:

    1. 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).
    2. Zhao, Quanbin & Xu, Jiayuan & Hou, Min & Chong, Daotong & Wang, Jinshi & Chen, Weixiong, 2024. "Dynamic characteristic analysis of SCO2 Brayton cycle under different turbine back pressure modes," Energy, Elsevier, vol. 293(C).
    3. 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).
    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. Guo, Xinru & Guo, Yumin & Wang, Jiangfeng & Meng, Xin & Deng, Bohao & Wu, Weifeng & Zhao, Pan, 2023. "Thermodynamic analysis of a novel combined heating and power system based on low temperature solid oxide fuel cell (LT-SOFC) and high temperature proton exchange membrane fuel cell (HT-PEMFC)," Energy, Elsevier, vol. 284(C).

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