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Interactions between the physical soil environment and a horizontal ground coupled heat pump, for a domestic site in the UK

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  • Garcia Gonzalez, Raquel
  • Verhoef, Anne
  • Vidale, Pier Luigi
  • Main, Bruce
  • Gan, Guogui
  • Wu, Yupeng

Abstract

There is currently an increased interest of Government and Industry in the UK, as well as at the European Community level and International Agencies (i.e. Department of Energy, American International Energy Agency), to improve the performance and uptake of Ground Coupled Heat Pumps (GCHP), in order to meet the 2020 renewable energy target. A sound knowledge base is required to help inform the Government Agencies and advisory bodies; detailed site studies providing reliable data for model verification have an important role to play in this. In this study we summarise the effect of heat extraction by a horizontal ground heat exchanger (installed at 1 m depth) on the soil physical environment (between 0 and 1 m depth) for a site in the south of the UK. Our results show that the slinky influences the surrounding soil by significantly decreasing soil temperatures. Furthermore, soil moisture contents were lower for the GCHP soil profile, most likely due to temperature-gradient related soil moisture migration effects and a decreased hydraulic conductivity, the latter as a result of increased viscosity (caused by the lower temperatures for the GCHP soil profile). The effects also caused considerable differences in soil thermal properties. This is the first detailed mechanistic study conducted in the UK with the aim to understand the interactions between the soil, horizontal heat exchangers and the aboveground environment. An increased understanding of these interactions will help to achieve an optimum and sustainable use of the soil heat resources in the future. The results of this study will help to calibrate and verify a simulation model that will provide UK-wide recommendations to improve future GCHP uptake and performance, while safeguarding the soil physical resources.

Suggested Citation

  • Garcia Gonzalez, Raquel & Verhoef, Anne & Vidale, Pier Luigi & Main, Bruce & Gan, Guogui & Wu, Yupeng, 2012. "Interactions between the physical soil environment and a horizontal ground coupled heat pump, for a domestic site in the UK," Renewable Energy, Elsevier, vol. 44(C), pages 141-153.
    • Handle: RePEc:eee:renene:v:44:y:2012:i:c:p:141-153
    DOI: 10.1016/j.renene.2012.01.080
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    References listed on IDEAS

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    1. Blum, Philipp & Campillo, Gisela & Münch, Wolfram & Kölbel, Thomas, 2010. "CO2 savings of ground source heat pump systems – A regional analysis," Renewable Energy, Elsevier, vol. 35(1), pages 122-127.
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    Cited by:

    1. 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.
    2. Lili Tan & James A. Love, 2013. "A Literature Review on Heating of Ventilation Air with Large Diameter Earth Tubes in Cold Climates," Energies, MDPI, vol. 6(8), pages 1-10, July.
    3. Gan, Guohui, 2018. "Dynamic thermal performance of horizontal ground source heat pumps – The impact of coupled heat and moisture transfer," Energy, Elsevier, vol. 152(C), pages 877-887.
    4. Tang, Fujiao & Nowamooz, Hossein, 2020. "Outlet temperatures of a slinky-type Horizontal Ground Heat Exchanger with the atmosphere-soil interaction," Renewable Energy, Elsevier, vol. 146(C), pages 705-718.
    5. Al-Ameen, Yasameen & Ianakiev, Anton & Evans, Robert, 2018. "Recycling construction and industrial landfill waste material for backfill in horizontal ground heat exchanger systems," Energy, Elsevier, vol. 151(C), pages 556-568.
    6. Girard, Aymeric & Gago, Eulalia Jadraque & Muneer, Tariq & Caceres, Gustavo, 2015. "Higher ground source heat pump COP in a residential building through the use of solar thermal collectors," Renewable Energy, Elsevier, vol. 80(C), pages 26-39.
    7. Al-Ameen, Yasameen & Ianakiev, Anton & Evans, Robert, 2017. "Thermal performance of a solar assisted horizontal ground heat exchanger," Energy, Elsevier, vol. 140(P1), pages 1216-1227.
    8. Tang, F. & Lahoori, M. & Nowamooz, H. & Rosin-Paumier, S. & Masrouri, F., 2021. "A numerical study into effects of soil compaction and heat storage on thermal performance of a Horizontal Ground Heat Exchanger," Renewable Energy, Elsevier, vol. 172(C), pages 740-752.
    9. Gan, Guohui, 2017. "Dynamic thermal simulation of horizontal ground heat exchangers for renewable heating and ventilation of buildings," Renewable Energy, Elsevier, vol. 103(C), pages 361-371.
    10. Somogyi, Viola & Sebestyén, Viktor & Nagy, Georgina, 2017. "Scientific achievements and regulation of shallow geothermal systems in six European countries – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 68(P2), pages 934-952.
    11. 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.
    12. Bryś, Krystyna & Bryś, Tadeusz & Sayegh, Marderos Ara & Ojrzyńska, Hanna, 2020. "Characteristics of heat fluxes in subsurface shallow depth soil layer as a renewable thermal source for ground coupled heat pumps," Renewable Energy, Elsevier, vol. 146(C), pages 1846-1866.
    13. 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.
    14. 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.
    15. 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.
    16. Pavel Neuberger & Radomír Adamovský, 2017. "Analysis of the Potential of Low-Temperature Heat Pump Energy Sources," Energies, MDPI, vol. 10(11), pages 1-14, November.
    17. 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.
    18. Aste, Niccolò & Adhikari, R.S. & Manfren, Massimiliano, 2013. "Cost optimal analysis of heat pump technology adoption in residential reference buildings," Renewable Energy, Elsevier, vol. 60(C), pages 615-624.
    19. 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.
    20. Bertermann, D. & Klug, H. & Morper-Busch, L., 2015. "A pan-European planning basis for estimating the very shallow geothermal energy potentials," Renewable Energy, Elsevier, vol. 75(C), pages 335-347.

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