IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v347y2026ics036054422600318x.html

Study of power recovery mechanism and system-level thermodynamic optimization of a novel compression high-temperature heat pump

Author

Listed:
  • Li, Zhengyong
  • Liang, Youcai
  • Zhu, Yan
  • Yao, Shunchun

Abstract

High-temperature heat pump technology is promising in the process of electrifying industrial heating. The high temperature characteristics cause limitations of refrigerant, component material, and cycle performance. To this end, this study employs a novel flash tank vapor injection enhanced cycle (NFVI-EEC) to explore the power recovery mechanism of the cycle. It features active dryness regulation, staged expansion, and dual-stage subcooling. In this paper, thermodynamic and economic models of NFVI-EEC are constructed, and the conversion principle and optimization direction of the throttling loss and the heat transfer loss are analyzed in detail. Innovatively, ejector efficiency and vapor injection efficiency, both centered on expansion work recovery capability, are proposed. Under typical operating conditions, using R1224yd(Z)/R1233zd(E) as refrigerant,the vapor injection efficiency of NFVI-EEC is improved by 14.96%-20.73% compared with FVIC; and the ejector efficiency is reduced by 9.99%-18.50% compared with BEEC. R1224yd(Z)/R1233zd(E) achieves the highest COP (3.51) among all refrigerant mixtures evaluated. Therefore, to further enhance the system performance of NFVI-EEC, the ejector efficiency can be used as an optimization target for further improvement. The theoretical framework for expansion process analysis constructed in this study will help guide the optimization of the expansion process in high-temperature heat pumps in the future.

Suggested Citation

  • Li, Zhengyong & Liang, Youcai & Zhu, Yan & Yao, Shunchun, 2026. "Study of power recovery mechanism and system-level thermodynamic optimization of a novel compression high-temperature heat pump," Energy, Elsevier, vol. 347(C).
    • Handle: RePEc:eee:energy:v:347:y:2026:i:c:s036054422600318x
    DOI: 10.1016/j.energy.2026.140216
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S036054422600318X
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2026.140216?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:347:y:2026:i:c:s036054422600318x. 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.