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Experimental and numerical investigations on the energy performance of a thermo-active tunnel

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  • Insana, A.
  • Barla, M.

Abstract

The paper illustrates the experimental and numerical study performed to assess the energy performance of a thermo-active tunnel lining. The experimental data from the real-scale energy tunnel prototype tested in the tunnel of the Turin Metro Line 1 South Extension are considered, by presenting the results of the tests performed in heating and cooling mode through both the ground and air configurations of the novel Enertun layout. Thanks to the availability of the original experimental data collected, it was possible to calibrate and corroborate a thermo-hydraulic numerical model, then used to extend the results to different ground and environmental conditions. Understanding of the role of some of the most important design parameters is illustrated in the form of parametric design charts, that update to the Enertun configuration those already existing in literature. A simple method for preliminary evaluation of the potential of energy tunnels, accounting for the investigated design parameters, is formulated.

Suggested Citation

  • Insana, A. & Barla, M., 2020. "Experimental and numerical investigations on the energy performance of a thermo-active tunnel," Renewable Energy, Elsevier, vol. 152(C), pages 781-792.
    • Handle: RePEc:eee:renene:v:152:y:2020:i:c:p:781-792
    DOI: 10.1016/j.renene.2020.01.086
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    References listed on IDEAS

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    1. Ogunleye, Oluwaseun & Singh, Rao Martand & Cecinato, Francesco & Chan Choi, Jung, 2020. "Effect of intermittent operation on the thermal efficiency of energy tunnels under varying tunnel air temperature," Renewable Energy, Elsevier, vol. 146(C), pages 2646-2658.
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    Cited by:

    1. Ji, Yongming & Shen, Shouheng & Wang, Xinru & Zhang, Hui & Qi, Haoyu & Hu, Songtao, 2024. "Impact of groundwater seepage on thermal performance of capillary heat exchangers in subway tunnel lining," Renewable Energy, Elsevier, vol. 227(C).
    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. Zhang, Guozhu & Cao, Ziming & Xiao, Suguang & Guo, Yimu & Li, Chenglin, 2022. "A promising technology of cold energy storage using phase change materials to cool tunnels with geothermal hazards," Renewable and Sustainable Energy Reviews, Elsevier, vol. 163(C).
    4. 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.
    5. Ma, Chunjing & Donna, Alice Di & Dias, Daniel & Zhang, Jiamin, 2021. "Numerical investigations of the tunnel environment effect on the performance of energy tunnels," Renewable Energy, Elsevier, vol. 172(C), pages 1279-1292.
    6. Ma, Qijie & Wang, Peijun & Fan, Jianhua & Klar, Assaf, 2022. "Underground solar energy storage via energy piles: An experimental study," Applied Energy, Elsevier, vol. 306(PB).
    7. R.V., Rohit & R., Vipin Raj & Kiplangat, Dennis C. & R., Veena & Jose, Rajan & Pradeepkumar, A.P. & Kumar, K. Satheesh, 2023. "Tracing the evolution and charting the future of geothermal energy research and development," Renewable and Sustainable Energy Reviews, Elsevier, vol. 184(C).
    8. Li, Chenglin & Zhang, Guozhu & Xiao, Suguang & Xie, Yongli & Liu, Xiaohua & Cao, Shiding, 2022. "Long-term operation of tunnel-lining ground heat exchangers in tropical zones: Energy, environmental, and economic performance evaluation," Renewable Energy, Elsevier, vol. 196(C), pages 1429-1442.
    9. Geisler, T. & Wolf, M. & Götzl, G. & Burger, U. & Cordes, T. & Voit, K. & Straka, W. & Nyeki, E. & Haslinger, E. & Auer, R. & Lauermann, M. & Pol, O. & Obradovic, M. & Pröll, T. & Marcher, T., 2023. "Optimizing the geothermal potential of tunnel water by separating colder sectional discharges - Case study Brenner Base Tunnel," Renewable Energy, Elsevier, vol. 203(C), pages 529-541.
    10. Li, Chenglin & Zhang, Guozhu & Xiao, Suguang & Shi, Yehui & Xu, Chenghua & Sun, Yinjuan, 2023. "Numerical investigation on thermal performance enhancement mechanism of tunnel lining GHEs using two-phase closed thermosyphons for building cooling," Renewable Energy, Elsevier, vol. 212(C), pages 875-886.

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