IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v175y2021icp580-592.html
   My bibliography  Save this article

Thermomechanical characteristics of an energy pile-raft foundation under heating operations

Author

Listed:
  • Li, Renrong
  • Kong, Gangqiang
  • Sun, Guangchao
  • Zhou, Yang
  • Yang, Qing

Abstract

This study aims to comprehensively explore the thermomechanical characteristics of energy pile-raft foundations through in situ full-scale field tests. The foundation of interest was subjected to the joint effect of building loading and cooling thermal loading. The temperature, strain, and stress variability in both the employed pile and raft were measured and analysed. The basement of the building acted as an insulator, and the near-surface ground temperatures under the basement were affected less by seasonal changes in the air temperature. The stabilized heat exchange rate of the energy pile was approximately 75.0 W/m. The overlying raft and building at the pile head and the expanded foot and sandstone at the pile toe imposed greater restraints than those observed at other parts of the pile. The thermally induced stress per centigrade near the pile head and toe was approximately −0.160 MPa/°C and −0.202 MPa/°C, respectively. The thermally induced stresses of this kind of pile were mostly stabilized after 16 days of heating operation. When the pile was under thermomechanical loading, the axial tensile stress was mobilized along the lower half of the pile, and the maximum measured tensile stress was approximately 0.25 MPa, which did not exceed the tensile strength of the employed concrete. The cooling (contracting) of the energy pile also influenced the nearby raft. The raft temperature decreased by 6.2 °C, and the additional tensile stress was approximately 0.88 MPa (40.0% of the upper bound).

Suggested Citation

  • Li, Renrong & Kong, Gangqiang & Sun, Guangchao & Zhou, Yang & Yang, Qing, 2021. "Thermomechanical characteristics of an energy pile-raft foundation under heating operations," Renewable Energy, Elsevier, vol. 175(C), pages 580-592.
  • Handle: RePEc:eee:renene:v:175:y:2021:i:c:p:580-592
    DOI: 10.1016/j.renene.2021.05.020
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148121006960
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.renene.2021.05.020?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Alberdi-Pagola, Maria & Poulsen, Søren Erbs & Jensen, Rasmus Lund & Madsen, Søren, 2020. "A case study of the sizing and optimisation of an energy pile foundation (Rosborg, Denmark)," Renewable Energy, Elsevier, vol. 147(P2), pages 2724-2735.
    2. Park, Hyunku & Lee, Seung-Rae & Yoon, Seok & Choi, Jung-Chan, 2013. "Evaluation of thermal response and performance of PHC energy pile: Field experiments and numerical simulation," Applied Energy, Elsevier, vol. 103(C), pages 12-24.
    3. Sutman, Melis & Speranza, Gianluca & Ferrari, Alessio & Larrey-Lassalle, Pyrène & Laloui, Lyesse, 2020. "Long-term performance and life cycle assessment of energy piles in three different climatic conditions," Renewable Energy, Elsevier, vol. 146(C), pages 1177-1191.
    4. Cecinato, Francesco & Loveridge, Fleur A., 2015. "Influences on the thermal efficiency of energy piles," Energy, Elsevier, vol. 82(C), pages 1021-1033.
    5. Park, Sangwoo & Lee, Dongseop & Lee, Seokjae & Chauchois, Alexis & Choi, Hangseok, 2017. "Experimental and numerical analysis on thermal performance of large-diameter cast-in-place energy pile constructed in soft ground," Energy, Elsevier, vol. 118(C), pages 297-311.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ai, Zhi Yong & Ye, Jia Ming, 2023. "Thermo-mechanical analysis of energy piled raft foundations in layered cross-anisotropic soils," Renewable Energy, Elsevier, vol. 219(P2).

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Andrea Ferrantelli & Jevgeni Fadejev & Jarek Kurnitski, 2019. "Energy Pile Field Simulation in Large Buildings: Validation of Surface Boundary Assumptions," Energies, MDPI, vol. 12(5), pages 1-20, February.
    2. Cunha, R.P. & Bourne-Webb, P.J., 2022. "A critical review on the current knowledge of geothermal energy piles to sustainably climatize buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 158(C).
    3. Zhao, Qiang & Chen, Baoming & Tian, Maocheng & Liu, Fang, 2018. "Investigation on the thermal behavior of energy piles and borehole heat exchangers: A case study," Energy, Elsevier, vol. 162(C), pages 787-797.
    4. Tomasz Sliwa & Aneta Sapińska-Śliwa & Tomasz Wysogląd & Tomasz Kowalski & Izabela Konopka, 2021. "Strength Tests of Hardened Cement Slurries for Energy Piles, with the Addition of Graphite and Graphene, in Terms of Increasing the Heat Transfer Efficiency," Energies, MDPI, vol. 14(4), pages 1-20, February.
    5. Ana Vieira & Maria Alberdi-Pagola & Paul Christodoulides & Saqib Javed & Fleur Loveridge & Frederic Nguyen & Francesco Cecinato & João Maranha & Georgios Florides & Iulia Prodan & Gust Van Lysebetten , 2017. "Characterisation of Ground Thermal and Thermo-Mechanical Behaviour for Shallow Geothermal Energy Applications," Energies, MDPI, vol. 10(12), pages 1-51, December.
    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. Heidari, Bahareh & Akbari Garakani, Amir & Mokhtari Jozani, Sahar & Hashemi Tari, Pooyan, 2022. "Energy piles under lateral loading: Analytical and numerical investigations," Renewable Energy, Elsevier, vol. 182(C), pages 172-191.
    8. Maragna, Charles & Loveridge, Fleur, 2019. "A resistive-capacitive model of pile heat exchangers with an application to thermal response tests interpretation," Renewable Energy, Elsevier, vol. 138(C), pages 891-910.
    9. Akbari Garakani, Amir & Mokhtari Jozani, Sahar & Hashemi Tari, Pooyan & Heidari, Bahareh, 2022. "Effects of heat exchange fluid characteristics and pipe configuration on the ultimate bearing capacity of energy piles," Energy, Elsevier, vol. 248(C).
    10. Sani, Abubakar Kawuwa & Singh, Rao Martand & Amis, Tony & Cavarretta, Ignazio, 2019. "A review on the performance of geothermal energy pile foundation, its design process and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 106(C), pages 54-78.
    11. Ma, Qijie & Wang, Peijun, 2020. "Underground solar energy storage via energy piles," Applied Energy, Elsevier, vol. 261(C).
    12. Bao, Xiaohua & Qi, Xuedong & Cui, Hongzhi & Tang, Waiching & Chen, Xiangsheng, 2022. "Experimental study on thermal response of a PCM energy pile in unsaturated clay," Renewable Energy, Elsevier, vol. 185(C), pages 790-803.
    13. Cao, Ziming & Zhang, Guozhu & Liu, Yiping & Zhao, Xu & Li, Chenglin, 2022. "Influence of backfilling phase change material on thermal performance of precast high-strength concrete energy pile," Renewable Energy, Elsevier, vol. 184(C), pages 374-390.
    14. Pei, Huafu & Song, Huaibo & Meng, Fanhua & Liu, Weiling, 2022. "Long-term thermomechanical displacement prediction of energy piles using machine learning techniques," Renewable Energy, Elsevier, vol. 195(C), pages 620-636.
    15. Georgiadis, Konstantinos & Skordas, Dimitrios & Kamas, Ioannis & Comodromos, Emilios, 2020. "Heating and cooling induced stresses and displacements in heat exchanger piles in sand," Renewable Energy, Elsevier, vol. 147(P2), pages 2599-2617.
    16. Zhao, Yong Zhi & Shi, Zhenming & Ai, Zhi Yong, 2024. "Evolution of mechanical and thermal behaviors of energy piles considering soil consolidation," Applied Energy, Elsevier, vol. 361(C).
    17. Cherati, Davood Yazdani & Ghasemi-Fare, Omid, 2021. "Practical approaches for implementation of energy piles in Iran based on the lessons learned from the developed countries experiences," Renewable and Sustainable Energy Reviews, Elsevier, vol. 140(C).
    18. Ng, C.W.W. & Farivar, A. & Gomaa, S.M.M.H. & Shakeel, M. & Jafarzadeh, F., 2021. "Performance of elevated energy pile groups with different pile spacing in clay subjected to cyclic non-symmetrical thermal loading," Renewable Energy, Elsevier, vol. 172(C), pages 998-1012.
    19. Charles Maragna & Fleur Loveridge, 2021. "A New Approach for Characterizing Pile Heat Exchangers Using Thermal Response Tests," Energies, MDPI, vol. 14(12), pages 1-18, June.
    20. Gao, Jiajia & Li, Anbang & Xu, Xinhua & Gang, Wenjie & Yan, Tian, 2018. "Ground heat exchangers: Applications, technology integration and potentials for zero energy buildings," Renewable Energy, Elsevier, vol. 128(PA), pages 337-349.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:175:y:2021:i:c:p:580-592. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.