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Consider a wooden door with a glass window. The door is 5 cm thick and 0.75 m wide by 2 m tall. The window is 0.2 m square and 1 cm thick. The air on one side of the door has a temperature of 23°C and a heat transfer coefficient of 10 W/m2-K. The air on the other side of the door has a temperature of 7°C and a heat transfer coefficient of 5- W/m2-K. With and without using resistance analogies, determine the following:
a. The average temperature on each side of the door.
b. The heat transfer from one side of the door to the other.
If the unit can perform its function either in State 1 or 2, find the steady-state availability A for the device.
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