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A layer of cork 6 inch thick is used as layer of thermal insulation in a...

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Mechanical Engineering

A layer of cork 6 inch thick is used as layer ofthermal insulation in a flat wall. The temperature of the cold sideis 40 oF and that of the warm side is 180 oF. The thermalconductivity of the cork at 32 oF is 0.021 Btu/ft-h-oF and that at200 oF is 0.032. The area of the wall is 25 ft. Estimate the rateof heat transfer through the wall. Answer: 182 Btu/hr

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