Heat Transfer Coefficient of Pipe Wall
The resistance to the flow of heat by the material of pipe wall can be expressed as a "heat transfer coefficient of the pipe wall". However, one needs to select if the heat flux is based on the pipe inner or the outer diameter.
where k is the effective thermal conductivity of the wall material and x is the wall thickness.
If the above assumption does not hold, then the wall heat transfer coefficient can be calculated using the following expression:
where di and do are the inner and outer diameters of the pipe, respectively.
The thermal conductivity of the tube material usually depends on temperature; the mean thermal conductivity is often used.
Read more about this topic: Heat Transfer Coefficient
Famous quotes containing the words heat, transfer, pipe and/or wall:
“For, ere Demetrius looked on Hermias eyne,
He hailed down oaths that he was only mine,
And when this hail some heat from Hermia felt,
So he dissolved, and showers of oaths did melt.”
—William Shakespeare (15641616)
“I have proceeded ... to prevent the lapse from ... the point of blending between wakefulness and sleep.... Not ... that I can render the point more than a pointbut that I can startle myself ... into wakefulnessand thus transfer the point ... into the realm of Memoryconvey its impressions,... to a situation where ... I can survey them with the eye of analysis.”
—Edgar Allan Poe (18091849)
“Wotever is, is right, as the young nobleman sveetly remarked wen they put him down in the pension list cos his mothers uncles vifes grandfather vunce lit the kings pipe vith a portable tinder-box.”
—Charles Dickens (18121870)
“But I would cry,
rooted into the wall that
was once my mother,
if I could remember how
and if I had the tears.”
—Anne Sexton (19281974)