IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v314y2025ics036054422404074x.html
   My bibliography  Save this article

Comparative study on dynamic characteristics of 600 MW supercritical coal-fired boilers using CO2 and water as working fluids

Author

Listed:
  • Liu, Kairui
  • Wang, Limin
  • Bai, Wengang
  • Che, Defu

Abstract

Currently, little attention has been paid to the dynamic characteristics of the supercritical CO2 (S-CO2) boiler, which dominate the dynamic performance of the S-CO2 coal-fired power generation system. In this study, a novel 600 MW S-CO2 boiler design was proposed, and its dynamic model was established and validated. The dynamic characteristics of the S-CO2 boiler under step disturbances in working fluid flow rate and coal feeding rate were analyzed and compared with those of a supercritical water boiler. When the CO2 mass flow rate and coal feeding rate were suddenly reduced by 5 %, the main CO2 temperature changed by +5.52 °C and −6.11 °C, with response times of 220 s and 250 s, respectively. The reheat CO2 temperature changed by +5.46 °C and −4.82 °C, with response times of 110 s and 200 s, respectively. Among all heating surfaces, the split economizer exhibited the longest response time. The S-CO2 boiler demonstrated a response time approximately 700 s shorter than that of the supercritical water boiler under identical disturbance conditions, with the variation in superheater outlet temperature being only about one-sixth as large. These results may provide valuable insights into optimizing operation and designing control strategies for the S-CO2 boiler.

Suggested Citation

  • Liu, Kairui & Wang, Limin & Bai, Wengang & Che, Defu, 2025. "Comparative study on dynamic characteristics of 600 MW supercritical coal-fired boilers using CO2 and water as working fluids," Energy, Elsevier, vol. 314(C).
    • Handle: RePEc:eee:energy:v:314:y:2025:i:c:s036054422404074x
    DOI: 10.1016/j.energy.2024.134296
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S036054422404074X
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2024.134296?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:314:y:2025:i:c:s036054422404074x. 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.