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Study on the dynamic characteristics and control strategies of the coupled system of the FHR and SCO2 cycle

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  • Xu, Jiayuan
  • Zhao, Quanbin
  • Chong, Daotong
  • Xu, Xiaodi
  • Chen, Weixiong
  • Wang, Jinshi

Abstract

The supercritical carbon dioxide (SCO2) Brayton cycle has high efficiency, compactness, and rapid response. Furthermore, the fluoride-salt-cooled high-temperature reactor (FHR), as a Generation IV nuclear reactor, is characterized by compactness, high temperature, and inherent safety. Therefore, the SCO2 cycle as the energy conversion system of the FHR can meet the requirements of modularity and compactness. However, the interaction characteristics between the FHR and SCO2 cycle are unknown, and the system control strategies that can guarantee the safety and flexibility of the coupled system need to be explored. In this study, a dynamic simulation model of the coupled system of the FHR and SCO2 cycle is established. Considering the complexity of the system, the dynamic characteristics of the FHR and SCO2 cycle are investigated separately. Then, the FHR and SCO2 cycle is coupled, and the interaction characteristics between the FHR and SCO2 cycle are further analyzed. It is shown that the coupled system is more flexible under SCO2 mass flow rate disturbance than under FHR reactivity disturbance. Based on that, various SCO2 mass flow rate control strategies are designed and investigated. Among them, the turbine bypass control strategy is the fastest, and system parameters are the most stable.

Suggested Citation

  • Xu, Jiayuan & Zhao, Quanbin & Chong, Daotong & Xu, Xiaodi & Chen, Weixiong & Wang, Jinshi, 2024. "Study on the dynamic characteristics and control strategies of the coupled system of the FHR and SCO2 cycle," Energy, Elsevier, vol. 312(C).
    • Handle: RePEc:eee:energy:v:312:y:2024:i:c:s0360544224033607
    DOI: 10.1016/j.energy.2024.133582
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    References listed on IDEAS

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