# Thermal capacitance of duct filling

Thermal capacitance of the material the duct is filled with such as air, bentonite, oil.

Symbol
$Q_{d_{fill}}$
Unit
J/m.K
Formulae
$1.0 \cdot 10^{-6} A_{d_{fill}} \sigma_{d_{fill}}$
Related
$A_{d_{fill}}$
$\sigma_{d_{fill}}$
Used in
$Q_{B_{d}}$