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Thermal resistance 12 of multi-layer backfill

Thermal resistance of 2nd segment along flow path $\Phi_1$ of the multi-layer backfill method.

Symbol
$R_{q12}$
Unit
K.m/W
Formulae
$\frac{\rho_{b2} s_{b2}}{w_{b4}}$
Related
$\rho_{b2}$
Thermal resistivity of middle layer [K.m/W]
$s_{b2}$
Thickness of middle layer [m]
$w_{b4}$
Distance to lateral edge of multi-layer backfill [m]
Used in
$R_{CG}$
Thermal resistance of multi-layer backfill [K.m/W]