Cengel 5th Edition Chapter 3 — Solution Manual Heat And Mass Transfer

$h=\frac{Nu_{D}k}{D}=\frac{10 \times 0.025}{0.004}=62.5W/m^{2}K$

The convective heat transfer coefficient for a cylinder can be obtained from:

The outer radius of the insulation is:

$\dot{Q}=h \pi D L(T_{s}-T

The heat transfer due to radiation is given by:

Assuming $k=50W/mK$ for the wire material,

The heat transfer from the insulated pipe is given by: