Air temperature in tunnel at outlet

Symbol
$\theta_{at,L}$
Unit
°C
Formulae
$\theta_{at,0}+\left(\theta_a+\left(T_t+T_e\right) N_{sys} N_c W_{tot}-\theta_{at,0}\right) \left(1-e^{\frac{-L_T}{L_0}}\right)$in tunnel
$\frac{W_{sum} L_T}{C_{av}}+\theta_{at,0}$in ventilated channel (Heinhold)