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Natural convection in groundwater-filled boreholes used as ground heat exchangers

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  • Spitler, Jeffrey D.
  • Javed, Saqib
  • Ramstad, Randi Kalskin

Abstract

In most of the world, borehole heat exchangers used with closed-loop ground source heat pump systems are backfilled with a low permeability grout to prevent water contamination. However, in Scandinavian countries, a different approach is taken – the borehole is sealed at the top and cased down to solid bedrock. The borehole then naturally fills with groundwater in the annular space between the U-tube and the borehole wall. Compared to grouted boreholes, the groundwater filling is advantageous in that it generally results in low borehole thermal resistance due to buoyancy-driven natural convection enhancing the heat transfer. Although this phenomena has been reported in several papers since the late 1980s, no calculation models have been available for use in either design tools or simulation programs. This paper presents experimental measurements from a single well-instrumented borehole under a range of heat transfer rates and annulus temperatures. Nusselt numbers for natural convection in the annulus are correlated against modified Rayleigh number. The results are verified by comparing to borehole thermal resistances predicted with the correlations to actual measurements from a range of boreholes in Sweden and Norway.

Suggested Citation

  • Spitler, Jeffrey D. & Javed, Saqib & Ramstad, Randi Kalskin, 2016. "Natural convection in groundwater-filled boreholes used as ground heat exchangers," Applied Energy, Elsevier, vol. 164(C), pages 352-365.
    • Handle: RePEc:eee:appene:v:164:y:2016:i:c:p:352-365
    DOI: 10.1016/j.apenergy.2015.11.041
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    References listed on IDEAS

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    1. Gehlin, S.E.A. & Hellström, G. & Nordell, B., 2003. "The influence of the thermosiphon effect on the thermal response test," Renewable Energy, Elsevier, vol. 28(14), pages 2239-2254.
    2. Liebel, Heiko T. & Javed, Saqib & Vistnes, Gunnar, 2012. "Multi-injection rate thermal response test with forced convection in a groundwater-filled borehole in hard rock," Renewable Energy, Elsevier, vol. 48(C), pages 263-268.
    3. Gustafsson, A.-M. & Westerlund, L., 2011. "Heat extraction thermal response test in groundwater-filled borehole heat exchanger – Investigation of the borehole thermal resistance," Renewable Energy, Elsevier, vol. 36(9), pages 2388-2394.
    4. Gehlin, S.E.A. & Hellström, G., 2003. "Influence on thermal response test by groundwater flow in vertical fractures in hard rock," Renewable Energy, Elsevier, vol. 28(14), pages 2221-2238.
    5. Witte, Henk J.L., 2013. "Error analysis of thermal response tests," Applied Energy, Elsevier, vol. 109(C), pages 302-311.
    6. Saqib Javed & Per Fahlén, 2011. "Thermal response testing of a multiple borehole ground heat exchanger," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 6(2), pages 141-148, March.
    7. Gustafsson, A.-M. & Westerlund, L., 2010. "Multi-injection rate thermal response test in groundwater filled borehole heat exchanger," Renewable Energy, Elsevier, vol. 35(5), pages 1061-1070.
    8. Marcotte, D. & Pasquier, P., 2008. "On the estimation of thermal resistance in borehole thermal conductivity test," Renewable Energy, Elsevier, vol. 33(11), pages 2407-2415.
    9. Zhang, Changxing & Guo, Zhanjun & Liu, Yufeng & Cong, Xiaochun & Peng, Donggen, 2014. "A review on thermal response test of ground-coupled heat pump systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 40(C), pages 851-867.
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