IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v151y2020icp805-815.html
   My bibliography  Save this article

Un-stationary thermal analysis of the vertical ground heat exchanger within unsaturated soils

Author

Listed:
  • Sławiński, Daniel

Abstract

The efficiency of heat exchange in ground heat exchangers (GHE) in many projects decreases throughout their service life. Large temperature fluctuations were observed during the ground heat exchanger loading and during its natural cooling. This problem stems mainly from the influences of heating and humidity migration on the operation of the ground heat exchanger in unsaturated soil. To find the answer to the problem numerical model of a porous medium with multi-component fluid flow was applied. The mathematical description was expanded by additional streams describing the exchange of thermal energy within the backfill material and the structure of the porous model. Ground porosity was mapped geometrically and mathematically. The definition of total temperature was introduced. The results obtained from proposed model were compared with another model results which was based on solving only the classical heat exchange equation. The model was also verified through the measurement data read from 3 sensors installed at different depths of one borehole and at different time intervals. The parameters of the model result from local climatic conditions of Jabłonna near Warsaw. 24-hour operation of a single borehole was simulated numerically. The results of the model proposed by the author were of a greater convergence with the real data than those obtained for the classical heat exchange model. The critical point of the model was the selection of the coefficients describing the flow resistance of i-components in the porous medium and the particular terms of the total temperature adopted definition. The proposed model allows for a more accurate estimation of the available thermal power in the future and more accurate analysis of the degree of the effort of the structure in the context of its exploitation and the destruction time.

Suggested Citation

  • Sławiński, Daniel, 2020. "Un-stationary thermal analysis of the vertical ground heat exchanger within unsaturated soils," Renewable Energy, Elsevier, vol. 151(C), pages 805-815.
    • Handle: RePEc:eee:renene:v:151:y:2020:i:c:p:805-815
    DOI: 10.1016/j.renene.2019.11.065
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148119317586
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.renene.2019.11.065?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. Fan, Rui & Jiang, Yiqiang & Yao, Yang & Shiming, Deng & Ma, Zuiliang, 2007. "A study on the performance of a geothermal heat exchanger under coupled heat conduction and groundwater advection," Energy, Elsevier, vol. 32(11), pages 2199-2209.
    2. Dai, L.H. & Shang, Y. & Li, X.L. & Li, S.F., 2016. "Analysis on the transient heat transfer process inside and outside the borehole for a vertical U-tube ground heat exchanger under short-term heat storage," Renewable Energy, Elsevier, vol. 87(P3), pages 1121-1129.
    Full references (including those not matched with items on IDEAS)

    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. Javadi, Hossein & Mousavi Ajarostaghi, Seyed Soheil & Rosen, Marc A. & Pourfallah, Mohsen, 2019. "Performance of ground heat exchangers: A comprehensive review of recent advances," Energy, Elsevier, vol. 178(C), pages 207-233.
    2. Aneta Sapińska-Sliwa & Marc A. Rosen & Andrzej Gonet & Joanna Kowalczyk & Tomasz Sliwa, 2019. "A New Method Based on Thermal Response Tests for Determining Effective Thermal Conductivity and Borehole Resistivity for Borehole Heat Exchangers," Energies, MDPI, vol. 12(6), pages 1-22, March.
    3. Yapparova, Alina & Matthäi, Stephan & Driesner, Thomas, 2014. "Realistic simulation of an aquifer thermal energy storage: Effects of injection temperature, well placement and groundwater flow," Energy, Elsevier, vol. 76(C), pages 1011-1018.
    4. Stylianou, Iosifina Iosif & Florides, Georgios & Tassou, Savvas & Tsiolakis, Efthymios & Christodoulides, Paul, 2017. "Methodology for estimating the ground heat absorption rate of Ground Heat Exchangers," Energy, Elsevier, vol. 127(C), pages 258-270.
    5. Nian, Yong-Le & Cheng, Wen-Long, 2018. "Insights into geothermal utilization of abandoned oil and gas wells," Renewable and Sustainable Energy Reviews, Elsevier, vol. 87(C), pages 44-60.
    6. Tye-Gingras, Maxime & Gosselin, Louis, 2014. "Generic ground response functions for ground exchangers in the presence of groundwater flow," Renewable Energy, Elsevier, vol. 72(C), pages 354-366.
    7. Kim, Jongchan & Lee, Youngmin & Yoon, Woon Sang & Jeon, Jae Soo & Koo, Min-Ho & Keehm, Youngseuk, 2010. "Numerical modeling of aquifer thermal energy storage system," Energy, Elsevier, vol. 35(12), pages 4955-4965.
    8. Xu, Qingqing & Dubljevic, Stevan, 2017. "Modelling and control of solar thermal system with borehole seasonal storage," Renewable Energy, Elsevier, vol. 100(C), pages 114-128.
    9. Wenke Zhang & Hongxing Yang & Lin Lu & Zhaohong Fang, 2017. "Investigation on the heat transfer of energy piles with two-dimensional groundwater flow," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 12(1), pages 43-50.
    10. Gang, Wenjie & Wang, Jinbo & Wang, Shengwei, 2014. "Performance analysis of hybrid ground source heat pump systems based on ANN predictive control," Applied Energy, Elsevier, vol. 136(C), pages 1138-1144.
    11. Xiao-Hui Sun & Hongbin Yan & Mehrdad Massoudi & Zhi-Hua Chen & Wei-Tao Wu, 2018. "Numerical Simulation of Nanofluid Suspensions in a Geothermal Heat Exchanger," Energies, MDPI, vol. 11(4), pages 1-18, April.
    12. Zhou, Zhihua & Zhang, Zhiming & Chen, Guanyi & Zuo, Jian & Xu, Pan & Meng, Chong & Yu, Zhun, 2016. "Feasibility of ground coupled heat pumps in office buildings: A China study," Applied Energy, Elsevier, vol. 162(C), pages 266-277.
    13. Qi, Zishu & Gao, Qing & Liu, Yan & Yan, Y.Y. & Spitler, Jeffrey D., 2014. "Status and development of hybrid energy systems from hybrid ground source heat pump in China and other countries," Renewable and Sustainable Energy Reviews, Elsevier, vol. 29(C), pages 37-51.
    14. Chen, Juanwen & Li, Zhibin & Huang, Wenbo & Ma, Qingshan & Li, Ang & Wang, Bin & Sun, Hongtao & Jiang, Fangming, 2024. "Super-long gravity heat pipe geothermal space heating system: A practical case in Taiyuan, China," Energy, Elsevier, vol. 299(C).
    15. Zhao, Zilong & Lv, Guoquan & Xu, Yanwen & Lin, Yu-Feng & Wang, Pingfeng & Wang, Xinlei, 2024. "Enhancing ground source heat pump system design optimization: A stochastic model incorporating transient geological factors and decision variables," Renewable Energy, Elsevier, vol. 225(C).
    16. Zanchini, Enzo & Lazzari, Stefano & Priarone, Antonella, 2012. "Long-term performance of large borehole heat exchanger fields with unbalanced seasonal loads and groundwater flow," Energy, Elsevier, vol. 38(1), pages 66-77.
    17. Bi, Yuehong & Wang, Xinhong & Liu, Yun & Zhang, Hua & Chen, Lingen, 2009. "Comprehensive exergy analysis of a ground-source heat pump system for both building heating and cooling modes," Applied Energy, Elsevier, vol. 86(12), pages 2560-2565, December.
    18. Carotenuto, Alberto & Ciccolella, Michela & Massarotti, Nicola & Mauro, Alessandro, 2016. "Models for thermo-fluid dynamic phenomena in low enthalpy geothermal energy systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 330-355.
    19. Matteo Antelmi & Francesco Turrin & Andrea Zille & Roberto Fedrizzi, 2023. "A New Type in TRNSYS 18 for Simulation of Borehole Heat Exchangers Affected by Different Groundwater Flow Velocities," Energies, MDPI, vol. 16(3), pages 1-23, January.
    20. Wang, Deqi & Lu, Lin & Zhang, Wenke & Cui, Ping, 2015. "Numerical and analytical analysis of groundwater influence on the pile geothermal heat exchanger with cast-in spiral coils," Applied Energy, Elsevier, vol. 160(C), pages 705-714.

    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:151:y:2020:i:c:p:805-815. 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.