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Energy and mechanical aspects on the thermal activation of diaphragm walls for heating and cooling

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  • Barla, Marco
  • Di Donna, Alice
  • Santi, Alessandro

Abstract

Underground geotechnical structures, such as deep and shallow foundations, diaphragm walls, tunnel linings and anchors are being increasingly employed as energy geostructures to exchange heat with the ground by installing absorber pipes into the structural elements. This paper focuses on the application of this technology to reinforced concrete diaphragm walls used for construction of underground car parks, basements and metro stations, with the purpose of heating and cooling the adjacent buildings. Preliminary numerical modelling allowed optimising the geothermal plant design of the diaphragm wall. Then its energy efficiency is investigated through finite element thermo-hydro coupled analyses together with the effects of the thermal activation on the surrounding soil. Finally, finite difference thermo-mechanical analyses are used to study the mechanical effects induced by the thermal activation.

Suggested Citation

  • Barla, Marco & Di Donna, Alice & Santi, Alessandro, 2020. "Energy and mechanical aspects on the thermal activation of diaphragm walls for heating and cooling," Renewable Energy, Elsevier, vol. 147(P2), pages 2654-2663.
    • Handle: RePEc:eee:renene:v:147:y:2020:i:p2:p:2654-2663
    DOI: 10.1016/j.renene.2018.10.074
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    References listed on IDEAS

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    1. Suryatriyastuti, M.E. & Mroueh, H. & Burlon, S., 2012. "Understanding the temperature-induced mechanical behaviour of energy pile foundations," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(5), pages 3344-3354.
    2. Cecinato, Francesco & Loveridge, Fleur A., 2015. "Influences on the thermal efficiency of energy piles," Energy, Elsevier, vol. 82(C), pages 1021-1033.
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    Cited by:

    1. Dai, Quanwei & Rotta Loria, Alessandro F. & Choo, Jinhyun, 2022. "Effects of internal airflows on the heat exchange potential and mechanics of energy walls," Renewable Energy, Elsevier, vol. 197(C), pages 1069-1080.
    2. Seokjae Lee & Sangwoo Park & Taek Hee Han & Jongmuk Won & Hangseok Choi, 2023. "Applicability Evaluation of Energy Slabs Installed in an Underground Parking Lot," Sustainability, MDPI, vol. 15(4), pages 1-15, February.
    3. Makasis, Nikolas & Narsilio, Guillermo A., 2020. "Energy diaphragm wall thermal design: The effects of pipe configuration and spacing," Renewable Energy, Elsevier, vol. 154(C), pages 476-487.

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