Acomposite wall 8 m long and 4 m high consists of 4 cm of brick, 8 cm of concrete, 6 cm of fiberglass and 10 cm of corkboard. the inside temperature is 18°c, and the outside temperature is 40°c. how much heat is flow into the house through this wall in 10 hours?

Heat flow through walls in 10 hours is

Explanation:

Thermal conductivity of all the materials is as follows

1). Concrete = 0.8

2). Brick = 0.6

3). Fibreglass = 0.04

4). Corkboard = 0.04

Area of the wall is given as

now the thermal resistance due to each wall is given as

Now total thermal resistance of all walls

now rate of heat transfer per second is given as

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