OHTC inside film + pipe wall

Overall heat transfer coefficient (OHTC) of the inside film and pipe wall.

Symbol

$U_{inwall}$

Unit

W/(K.m$^2$)

Formulas

$\frac{1}{\frac{D_{ref}}{D_{in} h_{in}}+\frac{D_{ref}}{D_{wall} U_{wall}}}$

Related

$D_{in}$

Diameter pipe (inner) [m]

$D_{ref}$

Diameter OHTC reference [m]

$D_{wall}$

Diameter pipe wall [m]

$h_{in}$

Heat transfer coefficient internal [W/(K.m$^2$)]

$U_{wall}$

OHTC pipe wall [W/(K.m$^2$)]

Used in

$\mathrm{Bi}_p$

Biot number pipe