IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v350y2026ics0360544226007723.html

Energy-efficiency optimization and internal flow characteristics with a variable outlet width strategy in large-scale centrifugal impeller system

Author

Listed:
  • Xu, Wei
  • Li, Wenlong
  • Chen, Genglin

Abstract

The pursuit of energy-efficiency has become paramount in industrial sectors of power plants, especially large-scale centrifugal impeller (CI) equipment. This study highlights the significance of incorporating a variable outlet width adjustment (VOWA) strategy in such integrated CI system to enhance energy-efficiency characteristics, including efficiency and pressure energy at off-design conditions. Reducing the impeller outlet width leads to a positive pressure squeezing effect near flow outlets, expanding the high-efficient operation range of individual CI equipment. Moreover, the proposed VOWA advances VFDs and IGVs to the overall integrated system at off-design conditions. The findings demonstrate that VOWA enables precise control of flow, resulting in enhanced efficiency and pressure energy performance and performed best among three strategies when considering the comprehensive energy-efficiency characteristics of the integrated large-scale CI system, for instance, the system-efficiency, adjustment-efficiency, and energy-saving rate. In contrast to VFDs, VOWA brings great energy-saving potential to the integrated system at off-design conditions. We anticipate that the proposed VOWA strategy will inspire further research to drive energy-efficient practices across power plant industries.

Suggested Citation

  • Xu, Wei & Li, Wenlong & Chen, Genglin, 2026. "Energy-efficiency optimization and internal flow characteristics with a variable outlet width strategy in large-scale centrifugal impeller system," Energy, Elsevier, vol. 350(C).
    • Handle: RePEc:eee:energy:v:350:y:2026:i:c:s0360544226007723
    DOI: 10.1016/j.energy.2026.140669
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544226007723
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2026.140669?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

    for a different version of it.

    More about this item

    Keywords

    ;
    ;
    ;
    ;
    ;
    ;

    Statistics

    Access and download statistics

    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:350:y:2026:i:c:s0360544226007723. 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.