Answered: An uninsulated steam pipe passes…

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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Question

An uninsulated steam pipe passes through a room in which the air and walls are at 25°C. The tube's outer diameter is 70 mm and its surface temperature and emissivity are 200°C and 0.8, respectively. Determine the surface emissive power and the irradiation. If the coefficient associated with the natural convection of surface heat transfer to air is 15 W/m².K, what will be the heat transfer rate per unit length of pipe?

Air :
T = 25°C
h = 15 W/m2-K
-T = 200°C
E = 0.8
D= 70 mm
T = 25°C

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