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Calculate the rat at which heat would be lost on a very cold winter day through a 6.2 m× 3.8 m brick wall 32 cm thick. The inside temperature is 26ºC; assume that the thermal conductivity of the brick is 0.74 W/m .K.

Calculate the rat at which heat would be lost on a very cold winter day through a 6.2 m× 3.8 m brick wall 32 cm thick. The inside temperature is 26ºC; assume that the thermal conductivity of the brick is 0.74 W/m .K.

Grade:upto college level

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
6 years ago
Area of the brick wall,
A = 6.2 m × 3.8 m
= 23.56 m2
Temperature difference, ΔT = (inside temperature) – (outside temperature)
= 26° C – (-18° C)
= 44° C
= (44+273) K
= 317 K
Thickness, Δx = 32 cm
= (32 cm) (1 m/100 cm)
= 0.32 m 232-1728_1.PNG

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