Cableizer ®

Air temperature at outlet

Symbol
$\theta_{at,L}$
Unit
°C
Formulas
$\theta_{init}+\left(\theta_{a}+\left(T_{t}+T_{e}\right) N_{sys} N_{c} W_{tot}-\theta_{init}\right) \left(1-e^{\frac{-L_{T}}{L_{0}}}\right)$in tunnel
$\frac{W_{sum} L_{T}}{C_{av}}+\theta_{init}$in ventilated channel (Heinhold)
Related
$C_{av}$
Heat capacity of the air flow [W/K]
$L_{0}$
Reference length of the tunnel [m]
$L_{T}$
Length tunnel [m]
$N_{c}$
Number of sources in system
$N_{sys}$
Number of parallel systems in the same confinement
$T_{e}$
External thermal resistance of tunnel [K.m/W]
$T_{t}$
Star thermal resistance tunnel [K.m/W]
$\theta_{a}$
Ambient temperature [°C]
$\theta_{init}$
Air temperature without load [°C]
$W_{sum}$
Sum of total losses of all systems [W/m]
$W_{tot}$
Total losses (object) [W/m]
Used in
$T_{sa}$
Thermal resistance convection object—air [K.m/W]
$\theta_{o,L}$
Temperature object surface at outlet [°C]
$\theta_{t,L}$
Temperature wall at outlet [°C]
$W_{a,L}$
Heat removed by air at outlet [W/m]