A concrete wall, which has a surface area of 20 m2 and is 0.30 m thick, separates conditioned room air from ambient air. The temperature of the inner surface of the wall is maintained at 25°C, and the thermal conductivity of the concrete is 1 W/mK. (a) Determine the rate of heat loss through the wall for outer surface temperatures ranging from −15°C to 38°C, which correspond to winter and summer extremes, respectively. Display your results graphically. (b) On your graph, also plot the rate of heat loss as a function of the outer surface temperature for wall materials having thermal conductivities of 0.75 and 1.25 W/m⋅K. Explain the family of curves you have obtained
A concrete wall, which has a surface area of 20 m2 and is 0.30 m thick, separates conditioned room air from ambient air. The temperature of the inner surface of the wall is maintained at 25°C, and the thermal conductivity of the concrete is 1 W/mK. (a) Determine the rate of heat loss through the wall for outer surface temperatures ranging from −15°C to 38°C, which correspond to winter and summer extremes, respectively. Display your results graphically. (b) On your graph, also plot the rate of heat loss as a function of the outer surface temperature for wall materials having thermal conductivities of 0.75 and 1.25 W/m⋅K. Explain the family of curves you have obtained
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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Question
A concrete wall, which has a surface area of 20 m2
and is 0.30 m thick, separates conditioned room air from
ambient air. The temperature of the inner surface of the
wall is maintained at 25°C, and the thermal conductivity of the concrete is 1 W/mK.
(a) Determine the rate of heat loss through the wall
for outer surface temperatures ranging from −15°C
to 38°C, which correspond to winter and summer
extremes, respectively. Display your results graphically.
(b) On your graph, also plot the rate of heat loss as a
function of the outer surface temperature for wall
materials having thermal conductivities of 0.75 and
1.25 W/m⋅K. Explain the family of curves you have
obtained
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