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Question: a composite plate is made up of stainless steel sheet...

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A composite plate is made up of stainless steel sheet of 25 mm thickness backed by 30 mm carbon steel plate. The thermal conductivities are 19.1 W/mK and 39.2 W/mK. A contact resistance of 5.28 × 10–4 m2°C/W exists between the sheets. If the total temperature drop in the composite wall is 18°C, determine the heat flow. If convection on the stainless steel side is from fluid at 160°C with h = 45 W/m2K find the surface temperatures of the plates. If the outside is exposed to air at 35°C, determine the convection coefficient on the outside.

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