# Temperature of outer jacket

The temperature of the outer jacket is identical to the external temperature $theta_e$.

*** These formulae are valid when the outer temperature defines the load.

Symbol
$\theta_{hsj}$
Unit
°C
Formulae
 $\theta_a+v_4 \Delta \theta_p-\left(v_4-1\right) \Delta \theta_x+\left(T_{4iii}+T_{4db}\right) v_4 W_{hs}$ Heat sources buried $\frac{W_{hs} T_{st} T_{sa}+\theta_t T_{sa}+\theta_{at} T_{st}}{T_{sa}+T_{st}}$ Heat sources in tunnel $\theta_{at}+T_{4iii} W_{hs}$ Heat sources in trough $\theta_a+v_4 \Delta \theta_p-\left(v_4-1\right) \Delta \theta_x+\left(T_{4iii}+T_{tr}\right) v_4 W_{hs}$ Heat sources in filled troughs $\theta_a+v_4 \Delta \theta_p-\left(v_4-1\right) \Delta \theta_x+\left(T_{4iii}+T_{4db}\right) v_4 W_{hs}+T_{hs} W_{hs}$ *** Heat sources buried
Related
$\Delta \theta_p$
$\Delta \theta_x$
$T_{4db}$
$T_{4iii}$
$T_{hs}$
$T_{sa}$
$T_{st}$
$\theta_a$
$\theta_{at}$
$\theta_t$
$W_{hs}$