Question

A 10 m^2 plane-wall with a thickness of 1m dissipates heat to ambient air through its two surfaces on the left and right, respectively. The thermal conductivity of the wall is ???? = 20 W/m*K . The convection heat transfer coefficient at its external surface ℎ = 20 W/(m^2)K . The measured surface temperature is 50 °C. The ambient air temperature is 0 ℃. (1) Draw a schematic Figure of this wall and have all parameters known clearly presented; (2) Find the heat dissipated from this wall to ambient air; (3) Find the maximum temperature within this wall;

Answer 1

2)20Kw

3)75C

Step-by-step explanation:

Hello, to solve this problem we must use the equations that describe the heat transfer by convection and conduction.

for point B

We use the convection heat transfer equation on one side of the wall and multiply it by 2 since they are two exposed surfaces.

for point C we use heat transfer by conduction to the middle of the wall with L = 0.5m.

I enclose you complete procedure