• Miloš J. Banjac, Faculty of Mechanical Engineering, University of Belgrade, Serbia

Experimental determination of thermophysical characteristics of soil as a heat source for geothermal heat pumps

  • When designing the geothermal heat pump heating system of the ground-water type, data on thermal conductivity of soil and its temperature are key parameters for dimensioning the outer part of the system - vertically buried heat exchanges. In this paper, one of the methods of experimental determination of these parameters, a so-called thermal response test, is presented. In addition to the description of the experimental procedure and installation, through the presentation of experimental data, the paper describes theoretical basis of the method, and presents its main limitations.
  • Keywords
    thermal response test, thermal conductivity of soil, geothermal heat pumps
  • Pages
    109 - 117
  • Submitted
  • Accepted
  • UDC
    0350-218X, 36 (2010), 1, 109-117
  • References
    • Luketina, K., Report on the World Geothermal Congress 2005, April 24-29, 2005, Antalya,Turkey
    • Poppei, J., Schwarz, R., Mattsson, N., Laloui, L., Wagner, R., Rohner, E., Innovate Improvements of Thermal Response Test, Intermediate Report, Commissioned by Swiss Federal Office of Energy (BFE), 2006, Zürich, Swiss
    • Cane, R. L. D., Clemes, S. B., Morrison, A., Hughes, P. J., Heat Exchanger Sizing for Vertical Closed-Loop Ground-Source Heat Pumps, Report No. DE-AC05-84OR21400, Oak Ridge National Laboratory, U.S. Department of Energy, 1995, Tenn., USA
    • Morgensen, P., Fluid to Duct Wall Heat Transfer in Duct System Heat Storage, Proceedings, International Conference on Surface Heat Storage in Theory and Practice, Stockholm, June 6-8, 1983, 652-657
    • Eklöf, C., Gehlin, S.,TED - a Mobile Equipment for Thermal Response Tests, M. Sc. thesis, Lulea University of Technology, Lulea, Sweden, 1996
    • Austin,W. A.,Yavuzturk, C., Spitler, J. D., Development of an in Situ System for Measuring Ground Thermal Properties, ASHRAE Transactions, 106 (2000), 1, 365-379
    • Gehlin, S., Thermal Response Test-Method Development and Evaluation, Ph. D. thesis, Lulea University of Technology, Lulea, Sweden, 2002
    • Signorelli, S., Bassetti, S., Pahud, D., Kohl, T., Numerical Evaluation of Thermal Response Tests, Geothermics, 36 (2007), 2, 141-166
    • Carslaw, H. S., Jaeger, J. C., Condution of Heat in Solids, 2nd ed., Oxford University Press, Oxford, UK, 1959
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