IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v319y2025ics0360544225006589.html
   My bibliography  Save this article

Control mechanism of compressible volume for transcritical CO2 cycle power system

Author

Listed:
  • Feng, Jiaqi
  • Wang, Junpeng
  • Zhang, Enbo
  • Bai, Bofeng

Abstract

Compressible volume control is one of the key control strategies of S-CO2 Brayton cycle system. In this paper, the compressible volume control of buffer tank and inventory tank is proposed for transcritical CO2 closed cycle. To clarify its control response characteristics, the dynamic simulation models are established. Its control mechanism and the influence of initial conditions on system response is investigated. The results show that the volume of buffer tank is appropriately 20 % of the system volume, which can play a buffering role and has a negligible impact on system response rate. The initial parameters and volume of the inventory tank determine its total mass of injection/extraction, which in turn determine the adjustment range of the system parameters. It is appropriate to set the initial pressure of inventory tank to the middle value of cycle maximum/minimum pressure and its volume to about 25 % of the system volume. Compared to the system response without inventory control, inventory control can control the stability of compressor inlet pressure, and it can increase the rate by 1.4 %/min when the load decreases and by 1.8 %/min when the load increases. This study provides insights into compressible volume control in transcritical CO2 closed cycle.

Suggested Citation

  • Feng, Jiaqi & Wang, Junpeng & Zhang, Enbo & Bai, Bofeng, 2025. "Control mechanism of compressible volume for transcritical CO2 cycle power system," Energy, Elsevier, vol. 319(C).
    • Handle: RePEc:eee:energy:v:319:y:2025:i:c:s0360544225006589
    DOI: 10.1016/j.energy.2025.135016
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544225006589
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2025.135016?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:319:y:2025:i:c:s0360544225006589. 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.