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Numerical Study on Heat Leakage, Thermal Stratification, and Self-Pressurization Characteristics in Liquid Helium Storage Tanks

Author

Listed:
  • Jing Xu

    (China Petroleum Engineering & Construction Corp. North China Company, Renqiu 062552, China)

  • Fa’an Liu

    (China Petroleum Engineering & Construction Corp. North China Company, Renqiu 062552, China)

  • Jianguo Zhang

    (China Petroleum Engineering & Construction Corp. North China Company, Renqiu 062552, China)

  • Chao Li

    (China Petroleum Engineering & Construction Corp. North China Company, Renqiu 062552, China)

  • Qinghua Liu

    (China Petroleum Engineering & Construction Corp. North China Company, Renqiu 062552, China)

  • Changjun Li

    (School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China
    CNPC Key Laboratory of Oil & Gas Storage and Transportation, Southwest Petroleum University, Chengdu 610500, China)

  • Wenlong Jia

    (School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China
    CNPC Key Laboratory of Oil & Gas Storage and Transportation, Southwest Petroleum University, Chengdu 610500, China)

  • Shixiong Fu

    (School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China)

  • Longjiang Li

    (School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China)

Abstract

During the operation of liquid-phase He-4 (LHe-4) storage tanks, heat leakage changes the thermophysical parameters and phase properties of the LHe-4 in the tanks, resulting in the thermal layering phenomenon. This phenomenon is characterized by the LHe-4 temperature gradient and pressure increase (self-pressurization) phenomena in the tanks. Based on the Layer-by-Layer model, a heat transfer model of a composite adiabatic structure with multilayer insulation and liquid nitrogen screen (LNCS) insulation was established, and the Neumann boundary heat flux of the thermal response model was determined. A numerical simulation model of the thermal response of a liquid helium storage tank was established. The spatial and temporal evolutions of the pressure distribution, natural convection characteristics, thermal stratification characteristics, and self-pressurization characteristics of the LHe-4 tank were investigated. Finally, the self-pressurization thermodynamic model of the LHe-4 storage tank was built based on the isothermal saturation and homogeneous model. It is shown that the predictive performance of the mLee model for the self-boosting characteristics (relative deviation of 14.32%) was significantly improved compared with that of the Lee model (relative deviation of 39.64%). The thermal stratification degree (TSD) of the tank increased with the operation time, with TSDs of 1.023, 1.028, and 1.036 at 1 h, 2 h, and 3 h, which exacerbated the self-pressurization of the tank. The wall surface in contact with the phase interface is a strong evaporation point, so the interfacial mass transfer rate maps show a pattern of high at both ends and low in the middle.

Suggested Citation

  • Jing Xu & Fa’an Liu & Jianguo Zhang & Chao Li & Qinghua Liu & Changjun Li & Wenlong Jia & Shixiong Fu & Longjiang Li, 2024. "Numerical Study on Heat Leakage, Thermal Stratification, and Self-Pressurization Characteristics in Liquid Helium Storage Tanks," Energies, MDPI, vol. 17(24), pages 1-29, December.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:24:p:6254-:d:1541743
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    References listed on IDEAS

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    1. Liu, Zhan & Li, Yanzhong, 2019. "Thermal physical performance in liquid hydrogen tank under constant wall temperature," Renewable Energy, Elsevier, vol. 130(C), pages 601-612.
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