# Temperature difference surface to tube

This is the temperature difference between the surface and the j-tube/riser.

Symbol
$\Delta \theta_{tube}$
Unit
K
Formulae
$\theta_{e} - \theta_{tube}$
Related
$\theta_{e}$
$\theta_{tube}$
Temperature of tube [$^{\circ}$C]
Used in
$\theta_{c}$
$W_{air}$