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Dynamic Modeling of the Two-Phase Leakage Process of Natural Gas Liquid Storage Tanks

Author

Listed:
  • Xia Wu

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

  • Changjun Li

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

  • Yufa He

    (China National Offshore Oil Corporation (CNOOC) Research Institute, Beijing 100028, China)

  • Wenlong Jia

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

Abstract

The leakage process simulation of a Natural Gas Liquid (NGL) storage tank requires the simultaneous solution of the NGL’s pressure, temperature and phase state in the tank and across the leak hole. The methods available in the literature rarely consider the liquid/vapor phase transition of the NGL during such a process. This paper provides a comprehensive pressure-temperature-phase state method to solve this problem. With this method, the phase state of the NGL is predicted by a thermodynamic model based on the volume translated Peng-Robinson equation of state (VTPR EOS). The tank’s pressure and temperature are simulated according to the pressure-volume-temperature and isenthalpic expansion principles of the NGL. The pressure, temperature, leakage mass flow rate across the leak hole are calculated from an improved Homogeneous Non-Equilibrium Diener-Schmidt (HNE-DS) model and the isentropic expansion principle. In particular, the improved HNE-DS model removes the ideal gas assumption used in the original HNE-DS model by using a new compressibility factor developed from the VTPR EOS to replace the original one derived from the Clausius-Clayperon equation. Finally, a robust procedure of simultaneously solving the tank model and the leak hole model is proposed and the method is validated by experimental data. A variety of leakage cases demonstrates that this method is effective in simulating the dynamic leakage process of NGL tanks under critical and subcritical releasing conditions associated with vapor/liquid phase change.

Suggested Citation

  • Xia Wu & Changjun Li & Yufa He & Wenlong Jia, 2017. "Dynamic Modeling of the Two-Phase Leakage Process of Natural Gas Liquid Storage Tanks," Energies, MDPI, vol. 10(9), pages 1-26, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:9:p:1399-:d:111773
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    References listed on IDEAS

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    1. Changjun Li & Wenlong Jia & Xia Wu, 2012. "Temperature Prediction for High Pressure High Temperature Condensate Gas Flow Through Chokes," Energies, MDPI, vol. 5(3), pages 1-13, March.
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    Cited by:

    1. Dongliang Li & Shaojun Xia & Jianghua Geng & Fankai Meng & Yutao Chen & Guoqing Zhu, 2022. "Discriminability Analysis of Characterization Parameters in Micro-Leakage of Turbocharged Boiler’s Evaporation Tube," Energies, MDPI, vol. 15(22), pages 1-20, November.
    2. Ehsan Barekat-Rezaei & Mahmood Farzaneh-Gord & Alireza Arjomand & Mohsen Jannatabadi & Mohammad Hossein Ahmadi & Wei-Mon Yan, 2018. "Thermo–Economical Evaluation of Producing Liquefied Natural Gas and Natural Gas Liquids from Flare Gases," Energies, MDPI, vol. 11(7), pages 1-17, July.
    3. Phan Anh Duong & Bo Rim Ryu & Mi Kyoung Song & Hong Van Nguyen & Dong Nam & Hokeun Kang, 2023. "Safety Assessment of the Ammonia Bunkering Process in the Maritime Sector: A Review," Energies, MDPI, vol. 16(10), pages 1-30, May.

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