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The inside of a furnace wall is at 800°C and with the existing wall of material with thermal conductivity of 22 W/mK loses 2.4 kW/m2 when the outside is exposed to convection to air at 30°C with h = 2 W/m2K. Determine the wall thickness. Additionally, 50 mm thickness of insulation with k = 1.5 W/mK is added on the inside. The furnace wall temperature and the surrounding temperature and convection coefficient remain unchanged. Determine the reduction in heat flow and reduction in the outside surface temperature

The inside of a furnace wall is at 800°C and with the existing wall of material with thermal conductivity of 22 W/mK loses 2.4 kW/m2 when the outside is exposed to convection to air at 30°C with h = 2 W/m2K. Determine the wall thickness. Additionally, 50 mm thickness of insulation with k = 1.5 W/mK is added on the inside. The furnace wall temperature and the surrounding temperature and convection coefficient remain unchanged. Determine the reduction in heat flow and reduction in the outside surface temperature

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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The inside of a furnace wall is at 800°C and with the existing wall of material with thermal conductivity
of 22 W/mK loses 2.4 kW/m2 when the outside is exposed to convection to air at 30°C with h = 2
W/m2K. Determine the wall thickness. Additionally, 50 mm thickness of insulation with k = 1.5 W/mK
is added on the inside. The furnace wall temperature and the surrounding temperature and convection
coefficient remain unchanged. Determine the reduction in heat flow and reduction in the outside surface
temperature

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