Science – Society – Technology
Table 2 Fluid, grout and borehole properties
From: Thermal response test numerical modeling using a dynamic simulator
BHE | Value | Fluid | Value | Grout (bentonitic mortar) | Value |
|---|---|---|---|---|---|
Type | Double U-tube | Mass density | 1000 kg/m3 | Thermal conductivity | 0.347 to 0.386 W/mK |
Borehole diameter | 0.127 m | Thermal conductivity | 0.52 W/m·K | Volumetric thermal capacity | 1.704 M J/m3∙K |
Length | 100 m | Specific heat capacity | 4186 J/kg·K | Density | 1420 kg/m3 |
Outer pipe diameter | 0.032 m | Dynamic viscosity | 0.001 kg/m·s | Thermal resistance | 0.018 to 0.02 m2∙K/W |
Wall thickness | 0.0029 m | ||||
Pipe thermal conductivity | 0.4 W/m·K | ||||
Volume flow rate/pipe | 36 m3/day |