(5-2) The shown firm stope wall is of 300 mm total thickness, 10 m long and 3 m high. It is finished on the inside with 30 mm of cement plaster (p 2,000 kg/m) and 50 mm of polystyrene board (p=30 kg/m). The concrete layer thickness is 150 mm (p= 2,300 kg/m). The inside and outside air temperatures are 20 and -2"C, respectively. The wind speed is 10 %3D %3D m/s. Calculate the followings: (a) Overall heat transfer coefficient of the wall. (b) Heat rate lost through the wall. Concrete Brick Stone Light Concrete Concrete Rock Wool Polystyrene Plaster Plaster PROBL PROBLEM (5-2) AVAVWAVAATAVAAYA

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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5-2

(b) Heat loss rate from the wall if its area is 15 m".
(5-2) The shown firm stope wall is of 300 mm total thickness, 10 m long and 3 m high. It is finished
on the inside with 30 mm of cement plaster (p = 2,000 kg/m) and 50 mm of polystyrene
board (p 30 kg/m'). The concrete layer thickness is 150 mm (p 2,300 kg/m'). The
inside and outside air temperatures are 20 and -2"C, respectively. The wind speed is 10
%3D
m/s.
Calculate the followings:
(a) Overall heat transfer coefficient of the wall.
(b) Heat rate lost through the wall.
Concrete Brick
Stone
Light Concrete
Concrete
Rock Wool
Polystyrene
Plaster
Plaster
PROBLEM (5-1)
PROBLEM (5-2)
Transcribed Image Text:(b) Heat loss rate from the wall if its area is 15 m". (5-2) The shown firm stope wall is of 300 mm total thickness, 10 m long and 3 m high. It is finished on the inside with 30 mm of cement plaster (p = 2,000 kg/m) and 50 mm of polystyrene board (p 30 kg/m'). The concrete layer thickness is 150 mm (p 2,300 kg/m'). The inside and outside air temperatures are 20 and -2"C, respectively. The wind speed is 10 %3D m/s. Calculate the followings: (a) Overall heat transfer coefficient of the wall. (b) Heat rate lost through the wall. Concrete Brick Stone Light Concrete Concrete Rock Wool Polystyrene Plaster Plaster PROBLEM (5-1) PROBLEM (5-2)
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