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Air velocity required to remove all heat by ventilation

This is the minimal velocity of the air inside the tunnel in order to remove all generated heat by ventilation.

Symbol
$V_{air,min}$
Unit
m/s
Formulae
$\frac{W_{sum} L_T}{C_{vair} A_t \left(\theta_{at,max}-\theta_{init}\right)}$
Related
$A_t$
Cross-sectional area of the tunnel [m$^2$]
$C_{vair}$
Volumetric heat capacity of air [J/(K.m$^3$)]
$L_T$
Length of the tunnel [m]
$\theta_{at,max}$
Maximal permissibe air temperature [°C]
$\theta_{init}$
Air temperature with no load [°C]
$W_{sum}$
Sum of total losses of all systems [W/m]