A long, thin-walled horizontal tube 100 mm in diame-ter is
Chapter 13, Problem 13.49(choose chapter or problem)
A long, thin-walled horizontal tube 100 mm in diame-ter is maintained at 120C by the passage of steamthrough its interior. A radiation shield is installedaround the tube, providing an air gap of 10 mmbetween the tube and the shield, and reaches a surfacetemperature of 35C. The tube and shield are diffuse,gray surfaces with emissivities of 0.80 and 0.10,respectively. What is the radiant heat transfer from thetube per unit length?
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