Calculate the rate of heat transfer between a pain of concentric horizontal cylinders 20 mm and 126 mm in diameter. The inner cylinder is maintained at 37°C and the outer cylinder is maintained at 17°C.
GIVEN
Concentric cylinders
Smaller diameter (Di) = 20 mm = 0.02 m
Larger diameter (Do) = 126 mm = 0.126 m
Inner cylinder temperature (Ti) = 37°C
Outer cylinder temperature (To) = 17°C
ASSUMPTIONS
Steady state
The space between the cylinders is filled with air
Radiative heat transfer is negligible