A vertical furnace wall is made up of an inner of firebrick 20 cm thick followed by insulating brick 15 cm thick and an outer wall of steel 1 cm thick. The surface temperature of the wall adjacent to the combustion chamber is 1,200°C while that the outer surface of steel is 50°C. The thermal conductivities of the wall material in W/m-K are: firebrick, 10; insulating brick, 0.26; and steel, 45. Neglecting the film resistances and contact resistance joints, determine the heat loss per sq. m. of wall area.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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2 A vertical furnace wall is made up of an inner of firebrick 20 cm thick
followed by insulating brick 15 cm thick and an outer wall of steel 1 cm thick.
The surface temperature of the wall adjacent to the combustion chamber is
1,200°C while that the outer surface of steel is 50°C. The thermal
conductivities of the wall material in W/m-K are: firebrick, 10; insulating brick,
0.26; and steel, 45. Neglecting the film resistances and contact resistance
joints, determine the heat loss per sq. m. of wall area.
Transcribed Image Text:2 A vertical furnace wall is made up of an inner of firebrick 20 cm thick followed by insulating brick 15 cm thick and an outer wall of steel 1 cm thick. The surface temperature of the wall adjacent to the combustion chamber is 1,200°C while that the outer surface of steel is 50°C. The thermal conductivities of the wall material in W/m-K are: firebrick, 10; insulating brick, 0.26; and steel, 45. Neglecting the film resistances and contact resistance joints, determine the heat loss per sq. m. of wall area.
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