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Q3: A composite wall consists of an iron plate of thickness L1=3 cm and thermal conductivity of kl =60 W/m C, an insulation layer of thickness L2=0.5 cm and thermal conductivity of k2 =0.2 W/m C, and an insulation of thickness L3-4 cm with thermal conductivity of k3 =0.05 W/m- •C. If the iron side temperature is 4200C and the insulation side is at 20oC. 1) Draw a thermal resistance system for the problem. 2) Find the heat loss per unit area. 3) Calculate the temperature at every interface.

Q3: A composite wall consists of an iron plate of thickness L1=3 cm and thermal conductivity of kl =60 W/m C, an insulation layer of thickness L2=0.5 cm and thermal conductivity of k2 =0.2 W/m C, and an insulation of thickness L3-4 cm with thermal conductivity of k3 =0.05 W/m- •C. If the iron side temperature is 4200C and the insulation side is at 20oC. 1) Draw a thermal resistance system for the problem. 2) Find the heat loss per unit area. 3) Calculate the temperature at every interface.

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
Problem 1.1MA
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Q3: A composite wall consists of an iron plate of thickness L1=3 cm and thermal conductivity of kl =60 W/m C, an insulation layer of thickness L2=0.5 cm and thermal conductivity of k2 =0.2 W/m- C, and an insulation of thickness L3-4 cm with thermal conductivity of k3 =0.05 W/m- •C. If the iron side temperature is 4200C and the insulation side is at 20oC. 1) Draw a thermal resistance system for the problem. 2) Find the heat loss per unit area. 3) Calculate the temperature at every interface.
Transcribed Image Text:Q3: A composite wall consists of an iron plate of thickness L1=3 cm and thermal conductivity of kl =60 W/m C, an insulation layer of thickness L2=0.5 cm and thermal conductivity of k2 =0.2 W/m- C, and an insulation of thickness L3-4 cm with thermal conductivity of k3 =0.05 W/m- •C. If the iron side temperature is 4200C and the insulation side is at 20oC. 1) Draw a thermal resistance system for the problem. 2) Find the heat loss per unit area. 3) Calculate the temperature at every interface.
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