Browsing Proceedings of the IGSHPA Technical/Research Conference and Expo 2017 by Subject "thermal conductivity"

Now showing items 1-5 of 5

    • Fractal approach to calculate the thermal conductivity of moist soil 

      Cai, Shanshan; Cui, Tengfei; Zheng, Boren; Hu, Pingfang (International Ground Source Heat Pump Association, 2017)
      The ground heat exchanger (GHE) is a key component in the design of a GSHP system and the effective thermal conductivity is one of the most important parameters that determine the heat transfer underground. In this paper, ...

    • Measurement of internal and effective borehole resistances during thermal response tests 

      Lamarche, Louis; Raymond, Jasmin; Koubikana Pambou, Claude Hugo (International Ground Source Heat Pump Association, 2017)
      In a conventional thermal response test (TRT), the main parameter evaluated is the bulk subsurface thermal conductivity surrounding the borehole. It is also possible to evaluate the borehole thermal resistance. Several ...

    • New methods to spatially extend thermal response test assessments 

      Raymond, Jasmin; Malo, Michel; Lamarche, Louis; Perozzi, Lorenzo; Gloaguen, Erwan; Bégin, Carl (International Ground Source Heat Pump Association, 2017)
      Thermal response tests (TRTs), used to evaluate the subsurface thermal conductivity when designing ground source heat pump systems, are spatially limited to the vicinity of the borehole where a test is carried out. The ...

    • Thermal response of helix ground heat exchangers 

      Fossa, Marco; Stutz, Benoit; Priarone, Antonella; Coperey, Antoine (International Ground Source Heat Pump Association, 2017)
      This paper is devoted to the thermal analysis of shallow ground heat exchangers with pipes arranged in a helix configuration. The pipes where the carrier fluid is circulated typically embrace a cylindrical volume that is ...

    • Transient thermal resistance of borehole heat exchangers for hourly simulations of geothermal heat pumps systems 

      Priarone, Antonella; Fossa, Marco (International Ground Source Heat Pump Association, 2017)
      The correct design of borehole fields requires the correct evaluation of the transient ground thermal response in time, but also the accurate estimation of the borehole (BHE) thermal resistance, expecially the grout ...