Cableizer ®

Cross-sectional area (inner) tunnel

Symbol
$A_{t}$
Unit
m$^2$
Formulas
$w_{t} h_{t}$rectangular shape
$\pi \left(\frac{Di_{t}}{2}\right)^2$circular shape
Related
$Di_{t}$
Diameter (inner) tunnel [m]
$h_{t}$
Height (inner) [m]
$\pi$
Archimedes' constant $\pi$
$w_{t}$
Width (inner) [m]
Used in
$C_{av}$
Heat capacity of the air flow [W/K]
$Di_{t}$
Diameter (inner) tunnel [m]
$T_{e}$
External thermal resistance of tunnel [K.m/W]
$V_{air,min}$
Air velocity required to remove all heat by ventilation [m/s]
$W_{a,L}$
Heat removed by air at outlet [W/m]