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Study of Ground Heat Exchangers in the Form of Parallel Horizontal Pipes Embedded in the Ground

Author

Listed:
  • Krzysztof Neupauer

    (Faculty of Chemical Engineering and Technology, Cracow University of Technology, 31-155 Kraków, Poland)

  • Sebastian Pater

    (Faculty of Chemical Engineering and Technology, Cracow University of Technology, 31-155 Kraków, Poland)

  • Krzysztof Kupiec

    (Faculty of Chemical Engineering and Technology, Cracow University of Technology, 31-155 Kraków, Poland)

Abstract

In order to predict long-term changes in the temperature of the ground in which a horizontal ground heat exchanger has been installed, it is beneficial to implement simplified mathematical models of heat transfer. The possibility of using a one-dimensional equation of heat conduction while modelling heat transfer in a ground heat exchanger with horizontal pipes has been demonstrated in the work. A theoretical analysis based on the linear heat source model as well as experimental research works have been carried out. It has been concluded that the temperature profiles of the ground in which parallel pipes of the heat exchanger are placed do not significantly differ from the profiles for the heat exchanger in the form of a plate; in particular, this refers to large distances from the level in which the pipes are positioned, small distances between pipes axes and the long duration of the process. Discrepancies between the calculated temperature increases for pipe and plate exchangers varied significantly in the individual time intervals, and were approx. 20–30%. The conducted experiments have demonstrated that the temperature field around parallel pipes of the heat exchanger may be described by the linear heat source model. The compatibility of temperature maps that were determined theoretically and experimentally was satisfactory with a good degree of accuracy.

Suggested Citation

  • Krzysztof Neupauer & Sebastian Pater & Krzysztof Kupiec, 2018. "Study of Ground Heat Exchangers in the Form of Parallel Horizontal Pipes Embedded in the Ground," Energies, MDPI, vol. 11(3), pages 1-16, February.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:491-:d:133457
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    References listed on IDEAS

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    1. Pavel Neuberger & Radomír Adamovský & Michaela Šeďová, 2014. "Temperatures and Heat Flows in a Soil Enclosing a Slinky Horizontal Heat Exchanger," Energies, MDPI, vol. 7(2), pages 1-16, February.
    2. Eloisa Di Sipio & David Bertermann, 2017. "Factors Influencing the Thermal Efficiency of Horizontal Ground Heat Exchangers," Energies, MDPI, vol. 10(11), pages 1-21, November.
    3. Chong, Chiew Shan Anthony & Gan, Guohui & Verhoef, Anne & Garcia, Raquel Gonzalez & Vidale, Pier Luigi, 2013. "Simulation of thermal performance of horizontal slinky-loop heat exchangers for ground source heat pumps," Applied Energy, Elsevier, vol. 104(C), pages 603-610.
    4. Paolo Conti, 2016. "Dimensionless Maps for the Validity of Analytical Ground Heat Transfer Models for GSHP Applications," Energies, MDPI, vol. 9(11), pages 1-21, October.
    5. Pavel Pauli & Pavel Neuberger & Radomír Adamovský, 2016. "Monitoring and Analysing Changes in Temperature and Energy in the Ground with Installed Horizontal Ground Heat Exchangers," Energies, MDPI, vol. 9(8), pages 1-13, July.
    6. Go, Gyu-Hyun & Lee, Seung-Rae & Yoon, Seok & Kim, Min-Jun, 2016. "Optimum design of horizontal ground-coupled heat pump systems using spiral-coil-loop heat exchangers," Applied Energy, Elsevier, vol. 162(C), pages 330-345.
    7. Naylor, Shawn & Ellett, Kevin M. & Gustin, Andrew R., 2015. "Spatiotemporal variability of ground thermal properties in glacial sediments and implications for horizontal ground heat exchanger design," Renewable Energy, Elsevier, vol. 81(C), pages 21-30.
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    Cited by:

    1. Jun-Seo Jeon & Seung-Rae Lee & Min-Jun Kim & Seok Yoon, 2018. "Suggestion of a Scale Factor to Design Spiral-Coil-Type Horizontal Ground Heat Exchangers," Energies, MDPI, vol. 11(10), pages 1-16, October.

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