Consider a plane composite wall that is composed of two materials of thermal conductivities ka =...

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Consider a plane composite wall that is composed of two materials of thermal conductivities ka = 0.09 W/mK and kB = 0.03 W/mK and thicknesses LA = 8 mm and LB = 16 mm. The contact resistance at the interface between the two materials is known to be 0.30 m². K/W. Material A adjoins a fluid at 200°C for which h = 10 W/m². K, and material B adjoins a fluid at 40°C for which h = 20 W/m². K. (a) What is the rate of heat transfer through a wall that is 2 m high by 2.5 m wide? (b) Sketch the temperature distribution. Consider a plane composite wall that is composed of two materials of thermal conductivities ka = 0.09 W/mK and kB = 0.03 W/mK and thicknesses LA = 8 mm and LB = 16 mm. The contact resistance at the interface between the two materials is known to be 0.30 m². K/W. Material A adjoins a fluid at 200°C for which h = 10 W/m². K, and material B adjoins a fluid at 40°C for which h = 20 W/m². K. (a) What is the rate of heat transfer through a wall that is 2 m high by 2.5 m wide? (b) Sketch the temperature distribution.