Example:
A flat wall is exposed to the environment.
The wall is covered with a layer of insulation 1
in. thick whose thermal conductivity is 0.8 Btu/hr-ft-°F.
The temperature of the wall on
the inside of the insulation is 600°F. The wall loses heat
to the environment by convection
on the surface of the insulation. The average value of the
convection heat transfer
coefficient on the insulation surface is 950 Btu/hr-ft2-°F.
Compute the bulk temperature
of the environment (Tb)
if the outer surface of the insulation does not exceed
105°F.
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