IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v355y2026ics0360544226013113.html

Three-phase absorption heat storage using a low-cost CaCl2/H2O working pair

Author

Listed:
  • Gao, Jintong
  • You, Jinfang
  • Xu, Zhenyuan

Abstract

Absorption heat storage offers a stable and scalable pathway for long-term thermal energy storage, yet its practical deployment is hindered by the limited energy storage density and high capital cost associated with lithium-based working pairs. In this study, we develop a three-phase absorption heat storage system using a low-cost CaCl2/H2O working pair. By introducing crystallization into the working cycle, the system leverages crystal formation to enhance the energy storage density without compromising operational stability. A 25-kW prototype was established to validate the concept, which provided space heating (45–50 °C), hot water supply (63–67 °C), and cooling (12–14 °C) outputs with energy storage densities of 163.5, 151.4, and 113.1 kWh m−3. Meanwhile, the coefficient of performance (COP) was 0.75, 0.73, and 0.60, with auxiliary electrical consumption representing a marginal 4%–6% of total energy demand. By combining multifunctional outputs with high ESD, the proposed system offers a low-cost, scalable route to sustainable thermal management and holds strong promise for large-scale decarbonization of heating and cooling.

Suggested Citation

  • Gao, Jintong & You, Jinfang & Xu, Zhenyuan, 2026. "Three-phase absorption heat storage using a low-cost CaCl2/H2O working pair," Energy, Elsevier, vol. 355(C).
    • Handle: RePEc:eee:energy:v:355:y:2026:i:c:s0360544226013113
    DOI: 10.1016/j.energy.2026.141205
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544226013113
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2026.141205?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:355:y:2026:i:c:s0360544226013113. 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.