A steel tube with 6 cm ID, 8.2 cm OD and k=18 W/m-C is covered with an insulative covering of thickness 3 cm and k = 0.3 W/m-C . A hot gas at 330 C with h = 400 W/m^2-C flows inside the tube. The outer surface of the insulation is exposed to cooler air at 28 C with h = 60 W/m^2-C. Calculate the heat loss from the tube to the air for 12 m of the tube and the temperature drops resulting from the thermal resistances of the hot gas flow, the steel tube, the insulation layer and the outside air.
A steel tube with 6 cm ID, 8.2 cm OD and k=18 W/m-C is covered with an insulative covering of thickness 3 cm and k = 0.3 W/m-C . A hot gas at 330 C with h = 400 W/m^2-C flows inside the tube. The outer surface of the insulation is exposed to cooler air at 28 C with h = 60 W/m^2-C. Calculate the heat loss from the tube to the air for 12 m of the tube and the temperature drops resulting from the thermal resistances of the hot gas flow, the steel tube, the insulation layer and the outside air.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A steel tube with 6 cm ID, 8.2 cm OD and k=18 W/m-C is covered with an insulative covering of thickness 3 cm and k = 0.3 W/m-C . A hot gas at 330 C with h = 400 W/m^2-C flows inside the tube. The outer surface of the insulation is exposed to cooler air at 28 C with h = 60 W/m^2-C. Calculate the heat loss from the tube to the air for 12 m of the tube and the temperature drops resulting from the thermal resistances of the hot gas flow, the steel tube, the insulation layer and the outside air.
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