# Temperature increase of air

This is the temperature rise of the air inside an air-filled trough or channel.

Symbol
$\Delta \theta_{air}$
Unit
K
Formulae
 $T_{tr} W_{sum}$ in trough $T_e W_{sum}$ in channel (Heinhold)
Related
$T_e$
$W_{sum}$
Used in
$\theta_{at}$