ABSTRACT
Soil-Borehole Thermal Energy Storage (SBTES) systems are used to store heat collected from renewable sources so that it can be used later for heating of buildings (Sibbitt et al. 2012; Zhang et al. 2012, Bas¸er & McCartney 2015). They function in a similar way to conventional geothermal heat exchange (GHE) systems, where heat is transferred from a source to a sink via circulation of fluid through a series of closedloop heat exchangers. However, they differ from GHE systems in that the heat is injected or extracted continuously over the course of a season into the borehole heat exchanger array. Further, the borehole array in a SBTES system is overlain by a hydraulic barrier to retain pore water within the subsurface and a thermal insulation layer to minimize heat losses to the atmosphere (Bas¸er et al. 2015, 2016).
