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A cold-storage room is constructed of an inner layer of Material X (k = 0.151 W/m-K), a middle layer of 108.6 mm Material Y (k = 0.0433 W/m-K), and an outer layer of 74.2 mm of concrete (k = 0.762 W/m-K). The wall surface temperature is -16.7 oC inside the cold room and 22.1 oC at the outside surface of the concrete. Assume A = 1 m2. Calculate the required thickness (in mm) of the Material X layer if the temperature at the interface between Material X and Material Y is maintained at -14.5 oC.

A cold-storage room is constructed of an inner layer of Material X (k = 0.151 W/m-K), a middle layer of 108.6 mm Material Y (k = 0.0433 W/m-K), and an outer layer of 74.2 mm of concrete (k = 0.762 W/m-K). The wall surface temperature is -16.7 oC inside the cold room and 22.1 oC at the outside surface of the concrete. Assume A = 1 m2. Calculate the required thickness (in mm) of the Material X layer if the temperature at the interface between Material X and Material Y is maintained at -14.5 oC.

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
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A cold-storage room is constructed of an inner layer of Material X (k = 0.151 W/m-K), a middle layer of 108.6 mm Material Y (k = 0.0433 W/m-K), and an outer layer of 74.2 mm of concrete (k = 0.762 W/m-K). The wall surface temperature is -16.7 oC inside the cold room and 22.1 oC at the outside surface of the concrete. Assume A = 1 m2. Calculate the required thickness (in mm) of the Material X layer if the temperature at the interface between Material X and Material Y is maintained at -14.5 oC.

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