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A 6.35 m of gylindrical tube whose inner surface is maintained at a temperature of T = 5°C is wrapped with an electrical heater on outer surface of the tube. The tube wall has inner and outer radi of r, = 25 andr, = 75 mm, and a thermal conductivity of 10 W/m.K. The thermal contact resistance between the heater and the outer surface of the tube (per unit length of the tube) is R = 0.01 m.K/W. The outer surface of the heater is exposed to a fluid with T = -10°C and a convection coefficient of h = 100 W/m K. The temperature of the surrounding is Turr= 18°C the emissivity for the outer surface is E = 0.8 ando = 5.67x10 W/m2.K. Determine the heater power required to maintain the heater at T. = 25°C in (W)? %3D !! %3D !! %3D !! NOTE: Enter your answer. Answer Tube Electrical Heater 111

A 6.35 m of gylindrical tube whose inner surface is maintained at a temperature of T = 5°C is wrapped with an electrical heater on outer surface of the tube. The tube wall has inner and outer radi of r, = 25 andr, = 75 mm, and a thermal conductivity of 10 W/m.K. The thermal contact resistance between the heater and the outer surface of the tube (per unit length of the tube) is R = 0.01 m.K/W. The outer surface of the heater is exposed to a fluid with T = -10°C and a convection coefficient of h = 100 W/m K. The temperature of the surrounding is Turr= 18°C the emissivity for the outer surface is E = 0.8 ando = 5.67x10 W/m2.K. Determine the heater power required to maintain the heater at T. = 25°C in (W)? %3D !! %3D !! %3D !! NOTE: Enter your answer. Answer Tube Electrical Heater 111

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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A 6.35 m of gylindrical tube whose inner surface is maintained at a temperature of T; = 5°C is wrapped with an electrical heater on outer surface of the tube. The tube wall has inner and outer radii of r = 25 andr, = 75 mm, and a thermal conductivity of 10 W/m.K, The thermal contact resistance between the heater and the outer surface of the tube (per unit length of the tube) is R = 0.01 m.K/W. The outer surface of the heater is exposed to a fluid with T = -10°C and a convection coefficient of h = 100 W/m-.K. The temperature of the surrounding is Trurr = 18°C, the emissivity for the outer surface is E = 0.8 and a = 5.67x10 W/m2 K*. Determine the heater power required to maintain the heater at T= 25°C in (W)? NOTE: Enter your answer. Answer. Tube Electrical Heater 11
Transcribed Image Text:A 6.35 m of gylindrical tube whose inner surface is maintained at a temperature of T; = 5°C is wrapped with an electrical heater on outer surface of the tube. The tube wall has inner and outer radii of r = 25 andr, = 75 mm, and a thermal conductivity of 10 W/m.K, The thermal contact resistance between the heater and the outer surface of the tube (per unit length of the tube) is R = 0.01 m.K/W. The outer surface of the heater is exposed to a fluid with T = -10°C and a convection coefficient of h = 100 W/m-.K. The temperature of the surrounding is Trurr = 18°C, the emissivity for the outer surface is E = 0.8 and a = 5.67x10 W/m2 K*. Determine the heater power required to maintain the heater at T= 25°C in (W)? NOTE: Enter your answer. Answer. Tube Electrical Heater 11
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