T, = 25°C, U = 1.0m/s Known: Electric current passes through a thin flat foil heater A=0.25m? with an area of A=0.25m² (width W=1.0m, length L=0.25m) and generates heat. The current is l=5.0 Amp and voltage drop across the heater is E=20.0 Volt. The top of the heater is exposed to cooling air with T = 25°C and U = 1.0m/s. Radiation can be neglected. The bottom of the heater is well insulated to ensure an adiabatic condition. Evaluate : (a) the average convective heat transfer coefficient h (b) heat flux q" from heater to air (c) temperature of the heater power Supply

T, = 25°C, U = 1.0m/s Known: Electric current passes through a thin flat foil heater A=0.25m? with an area of A=0.25m² (width W=1.0m, length L=0.25m) and generates heat. The current is l=5.0 Amp and voltage drop across the heater is E=20.0 Volt. The top of the heater is exposed to cooling air with T = 25°C and U = 1.0m/s. Radiation can be neglected. The bottom of the heater is well insulated to ensure an adiabatic condition. Evaluate : (a) the average convective heat transfer coefficient h (b) heat flux q" from heater to air (c) temperature of the heater power Supply

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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