The combined rock cavern/borehole heat store

Bo Nordell, Jouko Ritola, Kari Sipilä, Björn Sellberg

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)


    Sweden and Finland have both investigated underground thermal energy storage for nearly two decades, and have similar bedrock - the Fenno-Scandian granitic rocks. This article is a review of work performed in the field of combined rock cavern and borehole heat stores, concerned with construction technology, costs and design principles. One example is an asymmetric store, in the form of 40-60 m long horizontal boreholes between two rock caverns, with the caverns themselves comprising only about 10% of the total storage volume. This design has a specific cost of 0.40 MUSD/GWh and 0.24 MUSD/GWh for storage capacities of 6 GWh and 36 GWh respectively. Half of the total construction cost relates to the rock cavern part of the store.
    Original languageEnglish
    Title of host publicationThermal energy storage
    Subtitle of host publicationBetter economy, environment, technology
    EditorsMarkku Kangas, P.D. Lund
    Place of PublicationEspoo
    PublisherHelsinki University of Technology
    ISBN (Print)978-951-22-2223-0
    Publication statusPublished - 1994
    MoE publication typeA4 Article in a conference publication
    Event6th International Conference on Thermal Energy Storage, Calorstock '94 - Espoo, Finland
    Duration: 22 Aug 199425 Aug 1994


    Conference6th International Conference on Thermal Energy Storage, Calorstock '94


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