Calculate the maximum temperature in the wall


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Q: A plane wall 7.5 cm thick, generates heat internally at the rate of 105 W/m3. One side of the wall is insulated, and the other side is exposed to an environment at 90°C. The convective heat transfer coefficient between the wall and the environment is 500W/(m2 K). If the thermal conductivity of the wall is 12 W/(m K), calculate the maximum temperature in the wall.

GIVEN

Plane wall with internal heat generation

Thickness (L) = 7.5 cm = 0.075 m

Internal heat generation rate ( qG ) = 105 W/m3

One side is insulated

Ambient temperature on the other side (T?^?) = 90 °C

Convective heat transfer coefficient ( hc ) = 500 W/(m2 K)

Thermal conductivity (k) = 12 W/(m K)

ASSUMPTIONS

The heat loss through the insulation is negligible

The system has reached steady state

One dimensional conduction through thewall

715_Wall.jpg

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Mechanical Engineering: Calculate the maximum temperature in the wall
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