Applying the Exergy Balance: Closed Systems
The sun shines on a 300-ft2 south-facing wall, maintaining that surface at 98oF. Temperature varies linearly through the wall and is 77oF at its other surface. The wall thickness is 6 inches and its thermal conductivity is 0.04 Btu/h · ft oR. Assuming steady state, determine the rate of exergy destruction within the wall, in Btu/h. Let T0 = 77oF.
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