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Numerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities

Author

Listed:
  • Jun He

    (Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
    Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China)

  • Ke Wang

    (Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China)

  • Jiangang Li

    (Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China
    Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)

Abstract

The conductive components of the pyro-breaker in the quench protection system (QPS) have high current density, a large number of electrical contacts and high thermal flux. The water system needs to meet the requirements of cooling and arc extinguishing at the same time. In a previous study, the bottleneck of the steady-state capacity appeared in the barrel conductor of the commutation section, which has a cylindrical cavity. The thermal stability of the commutation section at 100 kA level was simulated in ANSYS/Workbench. The results indicate a certain level of enhancement of the convective heat transfer coefficient of the cavity is required to reach the current capacity. However, the fluid flow inside the cavity is very complex, and the convective heat transfer coefficient is difficult to calculate. In this paper, Computational fluid dynamics (CFD) is applied to the optimization of the cooling water system of the pyro-breaker. By studying the enhancement method of convective heat transfer, optimization of the structure and processing method of the water channel are proposed. The convective heat transfer coefficients of the cylindrical cavity in these optimizations were calculated in CFX. A set of optimizations of the cavity, which can meet the requirements of China Fusion Engineering Test Reactor (CFETR), were obtained and verified by experiments.

Suggested Citation

  • Jun He & Ke Wang & Jiangang Li, 2021. "Numerical Analysis of the Convective Heat Transfer Coefficient Enhancement of a Pyro-Breaker Utilized in Superconducting Fusion Facilities," Energies, MDPI, vol. 14(22), pages 1-11, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7565-:d:677726
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    References listed on IDEAS

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    1. Shinyoung Jeon & Changmin Son, 2021. "Comparative Numerical Study of the Influence of Film Hole Location of Ribbed Cooling Channel on Internal and External Heat Transfer," Energies, MDPI, vol. 14(15), pages 1-21, August.
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    Cited by:

    1. Varun Kumar & K. Chandan & K. V. Nagaraja & M. V. Reddy, 2022. "Heat Conduction with Krylov Subspace Method Using FEniCSx," Energies, MDPI, vol. 15(21), pages 1-16, October.

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