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Thermal resistance of jacket

Symbol
$T_j$
Unit
K.m/W
Formulae
$\frac{\rho_j}{2\pi} \ln\left(\frac{D_j}{D_j-2\left(t_j+t_{jj}\right)}\right)$
Related
$D_j$
Diameter over jacket [mm]
$\pi$
Archimedes' constant $\pi$
$\rho_j$
Thermal resistivity of jacket material [K.m/W]
$t_j$
Thickness of jacket [mm]
$t_{jj}$
Thickness of additional layer over jacket [mm]
Used in
$R_{c3}$
Thermal resistance, 3rd loop [K.m/W]
$R_{c4}$
Thermal resistance, 4th loop [K.m/W]