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Simulation Model of Regenerative LNG Refrigeration System for Re-Liquification of BOG

Author

Listed:
  • Sung-Hun Son

    (Department of Mechanical Engineering, Chungbuk National University, Cheongju 28644, Korea)

  • Kibum Kim

    (Department of Mechanical Engineering, Chungbuk National University, Cheongju 28644, Korea)

Abstract

Boil-off gas (BOG) disposal in liquefied natural gas (LNG) tankers has long been considered inevitable owing to the constant vaporization of the LNG in the storage tanks, but results in energy waste and environmental pollution. To address these challenges, we developed a re-liquification system that can condense the BOG and return it to the storage tank. The re-liquification system was modeled, and a case study was conducted to evaluate the viability of the system. The energy waste, which was quantified by tonnes of oil equivalent (TOE), greenhouse-gas emissions in tonnes of carbon dioxide (TCO 2 ), and cost reduction in millions of U.S. dollars (MUSD), was evaluated for five different tanker cruising speeds. The re-liquification system significantly reduced the average TOE, TCO 2 , and cost by up to 9120.40 TOE/year, 19,474.33 TCO 2 /year, and 1.9765 MUSD/year, respectively, for five different tanker speeds with multi-stage compression.

Suggested Citation

  • Sung-Hun Son & Kibum Kim, 2020. "Simulation Model of Regenerative LNG Refrigeration System for Re-Liquification of BOG," Energies, MDPI, vol. 13(15), pages 1-14, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3894-:d:392204
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    References listed on IDEAS

    as
    1. Kim, Kibum & Kim, Hae Kwang, 2018. "Characterization of products from Fe(CO)5 seeded CO diffusion flame," Energy, Elsevier, vol. 148(C), pages 802-808.
    2. Kim, SeLin & Choi, KyungWook & Lee, Kihyung & Kim, Kibum, 2016. "Evaluation of automotive waste heat recovery for various driving modes," Energy, Elsevier, vol. 106(C), pages 579-589.
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    Cited by:

    1. Bian, Jiang & Yang, Jian & Liu, Yang & Li, Yuxing & Cao, Xuewen, 2022. "Analysis and efficiency enhancement for energy-saving re-liquefaction processes of boil-off gas without external refrigeration cycle on LNG carriers," Energy, Elsevier, vol. 239(PB).
    2. Agnieszka Magdalena Kalbarczyk-Jedynak & Magdalena Ślączka-Wilk & Magdalena Kaup & Wojciech Ślączka & Dorota Łozowicka, 2022. "Assessment of Explosion Safety Status within the Area of an LNG Terminal in a Function of Selected Parameters," Energies, MDPI, vol. 15(11), pages 1-34, May.

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