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February 22, 2026Japanese Journal of JSCE0 citations

Reduction of Thermal Interference in Aquifer Thermal Energy Storage by Offsetting the Depths of Partially Penetrating Wells

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STShotaro TADOKOROSTShohei Albert TomitaYSYoshitaka SAKATA

Key Points

  • The objective is to evaluate methods for reducing thermal interference in aquifer thermal energy storage systems.
  • Proposed a configuration by offsetting the depths of partially penetrating wells.
  • Conducted numerical simulations to assess effectiveness.
  • Analyzed three scenarios with well depths offset by 20m and 40m.
  • At Darcy flow rates below 0.1m/d, the effective heat storage ratio improved by 20-59% with 20m depth offset and 32-66% with 40m.
  • For flow rates above 0.1m/d, a 40m offset can yield a 34-42% improvement.
  • Greater effect on heat interference suppression noted with increased hydraulic anisotropy.

Abstract

本研究では,井戸間の離隔が十分確保できない中小規模建物へ帯水層蓄熱システムを導入する場合に,懸念される熱干渉を抑制する手法として,部分貫入井の深度別配置を提案し,数値シミュレーションにより有効性を評価した.金沢市に広がる扇状地礫層(層厚60m)に2本の部分貫入井の揚水・還元深度を同一の場合と20mおよび40m下方にずらした計3ケースに対して解析を行った.その結果,ダルシー流速が0.1m/d以下であれば,部分貫入井を20m,40m下方にずらすことで,指標とする有効蓄熱量比はそれぞれ20–59%,32–66%向上した.0.1m/d以上の速い場合も深度を40mずらすことで,有効蓄熱量比が34–42%まで期待できること,特に透水異方性が大きい場合に熱干渉を抑制する効果が大きいことが分かった.

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Cite This Study

TADOKORO et al. (2026) studied this question.

synapsesocial.com/papers/699a9cc6482488d673cd291dhttps://doi.org/10.2208/jscejj.25-16159
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