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Cross-sectional area protective jacket

Cross-sectional area of the protective jacket over the insulation of a heat source, e.g. a district heat pipe.

Symbol
$A_{hsj}$
Unit
mm$^2$
Formulas
$\frac{\pi}{4} \left({D_{hsj}}^2-{D_{hsi}}^2\right)$
Related
$D_{hsi}$
Diameter over pipe insulation [mm]
$D_{hsj}$
Diameter over protective jacket [mm]
$\pi$
Archimedes' constant $\pi$