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Thermal behaviour of geothermal diaphragm walls: Evaluation of exchanged thermal power

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  • Rammal, D.
  • Mroueh, H.
  • Burlon, S.

Abstract

Geothermal structures represent an alternative source for heating and cooling of constructions. They are being widely used for their great potential in providing clean energy. The thermal performance of geothermal structures can be evaluated by measuring the possible exchanged heat. However, the assessment of the allowable exchanged heat is a complex issue which depends on several factors and is considered as an indicator of the efficiency and sustainability of these structures. This paper presents a new generalized sophisticated approach for the assessment of the possible exchanged power between geothermal diaphragm walls and the surrounding soil. The impacts of groundwater flow, active length of the diaphragm wall, and type of thermal load; on the thermal performance of geothermal diaphragm walls, are studied in details. Results obtained show that the presence of significant groundwater flow and activating the whole length of diaphragm wall, both affect positively the thermal exchange. Moreover, the type of the considered thermal load is found to have a direct impact on the thermal performance of diaphragm walls.

Suggested Citation

  • Rammal, D. & Mroueh, H. & Burlon, S., 2020. "Thermal behaviour of geothermal diaphragm walls: Evaluation of exchanged thermal power," Renewable Energy, Elsevier, vol. 147(P2), pages 2643-2653.
    • Handle: RePEc:eee:renene:v:147:y:2020:i:p2:p:2643-2653
    DOI: 10.1016/j.renene.2018.11.068
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    References listed on IDEAS

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    1. Bourne-Webb, Peter & Burlon, Sebastien & Javed, Saqib & Kürten, Sylvia & Loveridge, Fleur, 2016. "Analysis and design methods for energy geostructures," Renewable and Sustainable Energy Reviews, Elsevier, vol. 65(C), pages 402-419.
    2. Cecinato, Francesco & Loveridge, Fleur A., 2015. "Influences on the thermal efficiency of energy piles," Energy, Elsevier, vol. 82(C), pages 1021-1033.
    3. Ali Tolooiyan & Phil Hemmingway, 2014. "A preliminary study of the effect of groundwater flow on the thermal front created by borehole heat exchangers," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 9(4), pages 284-295.
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    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. Meibodi, Saleh S. & Loveridge, Fleur, 2022. "The future role of energy geostructures in fifth generation district heating and cooling networks," Energy, Elsevier, vol. 240(C).
    3. Xu, Yishuo & Guo, Yanlong & Wang, Huajun & Wang, Bo & Zhao, Yanting & Shen, Jian, 2023. "Influences of seasonal changes of the ground temperature on the performance of ground heat exchangers embedded in diaphragm walls: A cold climate case from North China," Renewable Energy, Elsevier, vol. 217(C).

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