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Answer to Question #13302 in Other Engineering for omar

Question #13302
A stadium has internal dimensions of 11 m x 4 m x 3 m high. The doors in this construction occupy 6m2 and 20% of the wall area is glazed. The inside air temperature is maintained at 18°C when the outside air temperature is -2°C. There are 4 air changes per hour. Total heat gain for the building is 2200W. The U-values in W/m.K are: walls 1.6, windows 5.5, doors 2.5, roof 1.5 and floor 0.8. The volumetric specific heat capacity of the air is 1300 J/m3K. The output of the radiators is 440 W/m2 of radiating surface.

Note:

a) Calculate the net rate of heat loss from this building.
b) Calculate the surface area of the radiators required to maintain the internal temperature under the above conditions.
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