A composite wall is to be constructed of 1/4-in. stainless steel (k = 10 Btu/h ft °F), 3 in. of corkboard (k = 0.025 Btu/h ft °F) and 1/2 in. of plastic (k = 1.5 Btu/h ft °F).
a. Draw the thermal circuit for the steady-state conduction through this wall.
b. Evaluate the individual thermal resistance of each material layer.
c. Determine the heat flux if the steel surface is maintained at 250°F and the plastic surface held at 80°F.
d. What are the temperatures on each surface of the corkboard under these conditions?
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