1.3 A concrete wall, which has a surface area of 20 m² and is 0.30 m thick, separates conditioned room air from ambient

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1 3 A Concrete Wall Which Has A Surface Area Of 20 M And Is 0 30 M Thick Separates Conditioned Room Air From Ambient 1 (63.03 KiB) Viewed 29 times

1.3 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 conductiv- ity of the concrete is 1 W/m-K. (a) Determine the 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 heat loss as a function of the outer surface temperature for wall materials hav ing thermal conductivities of 0.75 and 1.25 W/m-K. Explain the family of curves you have obtained.