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Thermal resistance insulation screen

Symbol
$T_{is}$
Unit
K.m/W
Formulas
$\frac{\rho_i}{2\pi} \ln\left(\frac{D_{ins}+2t_{is}}{D_{ins}}\right)$
Related
$D_{ins}$
Diameter over insulation [mm]
$\pi$
Archimedes' constant $\pi$
$\rho_i$
Thermal resistivity insulation material [K.m/W]
$t_{is}$
Thickness insulation screen [mm]
Used in
$R_{c2}$
Thermal resistance part 2 [K.m/W]
$T_1$
Thermal resistance conductor—sheath [K.m/W]
$T_i$
Thermal resistance insulation [K.m/W]