Review Article
Design Considerations for Borehole Thermal Energy Storage (BTES): A Review with Emphasis on Convective Heat Transfer
Table 1
Calculated steady-state heat losses from a cylindrical BTES array, with a temperature at the edge of the store of 50°C, an ambient undisturbed average rock temperature of 12°C, a rock thermal conductivity of 2.2 W m-1 K-1, and a rock volumetric heat capacity of 2.2 MJ m-3 K-1 with expanded polystyrene insulation (thermal conductivity 0.04 W m-1 K-1) of thickness 0.5 m extending over the top of the BTES and to a depth down the sides, using the mathematical technique of [17].
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