# Heat dissipation of heat source

A heat source is defined as having a positive heat dissipation, whereas a heat sink is defined by a negative value.

Symbol
$W_{hs}$
Unit
W/m
Formulae
 $\frac{\theta_{hs}-\theta_a-v_4 \Delta \theta_p+\left(v_4-1\right) \Delta \theta_x}{\left(T_{4iii}+T_{4db}\right) v_4}$ Heat sources buried $\frac{\theta_{hs} \left(T_{sa}+T_{st}\right)-\theta_t T_{sa}-\theta_{at} T_{st}}{T_{st} T_{sa}}$ Heat sources in tunnel $\frac{\theta_{hs}-\theta_{at}}{T_{4iii}}$ Heat sources in trough $\frac{\theta_{hs}-\theta_a-v_4 \Delta \theta_p+\left(v_4-1\right) \Delta \theta_x}{\left(T_{4iii}+T_{tr}\right) v_4}$ Heat sources in filled troughs
Related
$\Delta \theta_p$
$\Delta \theta_x$
$T_{4db}$
$T_{4iii}$
$T_{sa}$
$T_{st}$
$\theta_a$
$\theta_{at}$
$\theta_{hs}$
$\theta_t$
Used in
$T_{surf}$
$\theta_{de}$
$\theta_{di}$
$\theta_{hs}$
$W_h$