The wall of a rectangular chemical tank consists of two layers- inner layer with 15 cm of copper (k = 385 W/m.K) and outer layer with 10 cm of Cast Iron (k = 60 W/m.K). To reduce the heat loss from the tank, a layer of Asbestos sheet (k = 0.17 W/m.K) is to be placed in between the copper and cast iron layers. What thickness of Asbestos sheet is required for reducing the heat loss through the wall by 70 percent?

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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The wall of a rectangular chemical tank consists of two layers- inner layer with 15 cm of copper (k = 385 W/m.K) and outer layer with 10 cm of Cast Iron (k = 60 W/m.K). To reduce the heat loss from the tank, a layer of Asbestos sheet (k = 0.17 W/m.K) is to be placed in between the copper and cast iron layers. What thickness of Asbestos sheet is required for reducing the heat loss through the wall by 70 percent?

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