IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v316y2025ics0360544225001550.html
   My bibliography  Save this article

Exploring the process robustness and dynamic response of directly Re-liquefying BOG using subcooled LNG

Author

Listed:
  • Yin, Liang
  • Qi, Meng
  • Xie, Xiaomin
  • Ju, Yonglin

Abstract

In this study, a dynamic simulation of a system for the direct re-liquefaction of boil-off gas (BOG) using subcooled liquefied natural gas (LNG) is carried out and compared with the steady-state results. By comparing and analyzing the effect of two different control strategies on stability: direct flow control and cascade control, it is found that the cascade control is superior. The effects of various parameter disturbances, including LNG temperature, LNG pressure and ambient temperature, are investigated to gain a comprehensive understanding of the stability and dynamic response of the process. Meanwhile, the system robustness is analyzed and the results indicate that the stream state entering the gas-liquid separator has the greatest impact on the system stability. When it is a pure liquid, the system has minimal fluctuations and can quickly restore dynamic equilibrium; when it is in the presence of a gas, the system will continue to fluctuate within tolerance limits. In addition, the disturbance on the temperature of the refrigerant entering the cold box, namely the ambient temperature, has a greater impact on the system compared to the disturbance of the pressure of the LNG itself. These conclusions bridge the gap of the steady-state simulations and also provide theoretical support for practical operation.

Suggested Citation

  • Yin, Liang & Qi, Meng & Xie, Xiaomin & Ju, Yonglin, 2025. "Exploring the process robustness and dynamic response of directly Re-liquefying BOG using subcooled LNG," Energy, Elsevier, vol. 316(C).
    • Handle: RePEc:eee:energy:v:316:y:2025:i:c:s0360544225001550
    DOI: 10.1016/j.energy.2025.134513
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544225001550
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2025.134513?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:316:y:2025:i:c:s0360544225001550. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.