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Efficiency of closed loop geothermal heat pumps: A sensitivity analysis

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  • Casasso, Alessandro
  • Sethi, Rajandrea

Abstract

Geothermal heat pumps are becoming more and more popular as the price of fossil fuels is increasing and a strong reduction of anthropogenic CO2 emissions is needed. The energy performances of these plants are closely related to the thermal and hydrogeological properties of the soil, but a proper design and installation also plays a crucial role. A set of flow and heat transport simulations has been run to evaluate the impact of different parameters on the operation of a GSHP. It is demonstrated that the BHE length is the most influential factor, that the heat carrier fluid also plays a fundamental role, and that further improvements can be obtained by using pipe spacers and highly conductive grouts. On the other hand, if the physical properties of the soil are not surveyed properly, they represent a strong factor of uncertainty when modelling the operation of these plants. The thermal conductivity of the soil has a prevailing importance and should be determined with in-situ tests (TRT), rather than assigning values from literature. When groundwater flow is present, the advection should also be considered, due to its positive effect on the performances of BHEs; by contrast, as little is currently known about thermal dispersion, relying on this transport mechanism can lead to an excessively optimistic design.

Suggested Citation

  • Casasso, Alessandro & Sethi, Rajandrea, 2014. "Efficiency of closed loop geothermal heat pumps: A sensitivity analysis," Renewable Energy, Elsevier, vol. 62(C), pages 737-746.
    • Handle: RePEc:eee:renene:v:62:y:2014:i:c:p:737-746
    DOI: 10.1016/j.renene.2013.08.019
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    References listed on IDEAS

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    1. Blum, Philipp & Campillo, Gisela & Kölbel, Thomas, 2011. "Techno-economic and spatial analysis of vertical ground source heat pump systems in Germany," Energy, Elsevier, vol. 36(5), pages 3002-3011.
    2. Michopoulos, A. & Kyriakis, N., 2010. "The influence of a vertical ground heat exchanger length on the electricity consumption of the heat pumps," Renewable Energy, Elsevier, vol. 35(7), pages 1403-1407.
    3. Marcotte, D. & Pasquier, P. & Sheriff, F. & Bernier, M., 2010. "The importance of axial effects for borehole design of geothermal heat-pump systems," Renewable Energy, Elsevier, vol. 35(4), pages 763-770.
    4. Witte, Henk J.L., 2013. "Error analysis of thermal response tests," Applied Energy, Elsevier, vol. 109(C), pages 302-311.
    5. Badescu, Viorel, 2007. "Economic aspects of using ground thermal energy for passive house heating," Renewable Energy, Elsevier, vol. 32(6), pages 895-903.
    6. Chung, Jin Taek & Choi, Jong Min, 2012. "Design and performance study of the ground-coupled heat pump system with an operating parameter," Renewable Energy, Elsevier, vol. 42(C), pages 118-124.
    7. Saner, Dominik & Juraske, Ronnie & Kübert, Markus & Blum, Philipp & Hellweg, Stefanie & Bayer, Peter, 2010. "Is it only CO2 that matters? A life cycle perspective on shallow geothermal systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(7), pages 1798-1813, September.
    8. Lee, C.K., 2011. "Effects of multiple ground layers on thermal response test analysis and ground-source heat pump simulation," Applied Energy, Elsevier, vol. 88(12), pages 4405-4410.
    9. Wagner, Valentin & Bayer, Peter & Kübert, Markus & Blum, Philipp, 2012. "Numerical sensitivity study of thermal response tests," Renewable Energy, Elsevier, vol. 41(C), pages 245-253.
    10. Jun, Liu & Xu, Zhang & Jun, Gao & Jie, Yang, 2009. "Evaluation of heat exchange rate of GHE in geothermal heat pump systems," Renewable Energy, Elsevier, vol. 34(12), pages 2898-2904.
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