Numerical modeling and validation of a large-scale borehole thermal energy storage system in Finland

Tianchen Xue*, Juha Jokisalo, Risto Kosonen, Mika Vuolle, Federica Marongiu, Sami Vallin, Nina Leppäharju, Teppo Arola

*Corresponding author for this work

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

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Abstract

With the increasing demand in reducing carbon dioxide emissions, utilizing thermal energy storage technology, including borehole thermal energy storage (BTES), has become an efficient way to improve energy efficiency. Accurate modelling of the BTES is crucial to correctly predict the BTES performance in the building energy simulation. In this study, a large-scale BTES used for an educational building in Finland, was modelled in the IDA ICE 4.8. The BTES consists of 74 groundwater-filled boreholes with 310 m depth. The boreholes were installed with single U-tube heat exchangers. The BTES model was validated by 1.5-years measured inlet and outlet fluid temperatures of the BTES field. The results show the developed BTES model can predict the storage performance with high accuracy. During the 1.5-years validation period, the average difference between simulated and measured inlet and outlet fluid temperatures of the BTES field were within 1 °C.
Original languageEnglish
Title of host publicationBuildSim Nordic 2022
PublisherEDP Sciences
Chapter06003
Pages1-6
Number of pages6
Volume362
DOIs
Publication statusPublished - 1 Dec 2022
MoE publication typeA4 Conference publication
EventBuildSim-Nordic - Copenhagen, Denmark
Duration: 22 Aug 202123 Aug 2022
Conference number: 10

Publication series

NameE3S Web of Conferences
Volume362
ISSN (Electronic)2267-1242

Conference

ConferenceBuildSim-Nordic
Abbreviated titleBSN
Country/TerritoryDenmark
CityCopenhagen
Period22/08/202123/08/2022

Keywords

  • Borehole thermal storage
  • numerical modeling
  • experimental validation

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  • FinEst Twins: FinEst Twins

    Nieminen, M.

    01/12/201930/11/2026

    Project: EU: Framework programmes funding

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