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A furnace wall consists of 200 mm of refractory fireclay brick, 100 mm of kaolin brick, and 6 mm of steel plate. The fire side of the refractory is at 1150°C and the outside of the steel is at 30°C. An accurate heat balance over the furnace shows the heat loss from the wall to be 300 W/m2 . It is known that there may be thin layers of air between the layers of brick and steel. To how many millimeters of kaolin are these air layers equivalent

A furnace wall consists of 200 mm of refractory fireclay brick, 100 mm of kaolin brick, and 6 mm of steel plate. The fire side of the refractory is at 1150°C and the outside of the steel is at 30°C. An accurate heat balance over the furnace shows the heat loss from the wall to be 300 W/m2 . It is known that there may be thin layers of air between the layers of brick and steel. To how many millimeters of kaolin are these air layers equivalent

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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A furnace wall consists of 200 mm of refractory fireclay brick, 100 mm of kaolin brick,
and 6 mm of steel plate. The fire side of the refractory is at 1150°C and the outside of the
steel is at 30°C. An accurate heat balance over the furnace shows the heat loss from the
wall to be 300 W/m2
. It is known that there may be thin layers of air between the layers of
brick and steel. To how many millimeters of kaolin are these air layers equivalent? The
thermal conductivities of the fireclay brick, the kaolin brick and the steel are 1.7, 0.17, 17,
respectively

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