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# hw03 - NCSU MAE310 HOMEWORK#3 Provide a clear concise...

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NCSU MAE310 H OMEWORK #3 Provide a clear concise solution for each of the following steady, one-dimensional planar conductive heat transfer problems. Assume that there is no energy generation with constant properties. 1. A composite wall separates combustion gases at 2600°C from a liquid coolant at 100°C, with gas- and liquid-side convective heat transfer coefficients of 50 and 1000 W/m 2 •K. The wall is composed of a layer of beryllium oxide on the gas side 10 mm thick and a slab of stainless steel (AISI 304) on the liquid side 20 mm thick. The contact resistance between the oxide and the steel is 0.05 m 2 •K/W. The thermal conductivities of the beryllium oxide and stainless steel are 15 and 12.6 W/m•K, respectively. What is the heat loss per unit surface are of the composite? Qualitatively sketch the temperature distribution through the gas, the composite solid and the liquid. 2. A hot steam pipe having an inside surface temperature of 250°C has an inside diameter of 8 cm and a wall thickness of 5.5 mm.

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hw03 - NCSU MAE310 HOMEWORK#3 Provide a clear concise...

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