The Roof Of A House Consists Of A 15 Cm Thick Concrete Slab

The emissivity of the outer surface of the roof is 0 9 and the convection heat transfer coefficient on that surface is estimated to be 15 w m k.

The roof of a house consists of a 15 cm thick concrete slab.

The inner surface of the roof is maintained at a c. The convection heat transfer coefficients on the inner and outer surfaces of the roof are 5. The convection heat transfer coefficients on the inner and outer surfaces of the roof are 5 and l w m 2 k respectively. On a clear winter night the ambient air is reported to be at 10 c while the night sky temperature is 100 k.

One evening at 6 pm the slab is observed to be at a uniform temperature of 18 c. The roof of a house consists of a 15 cm thick concrete slab k 1 4 w m k and α 0 69 10 6 m 2 s that is 18 m wide and 32 m long. The inner surface of the roof is maintained at 15 c. The roof of a house consists of a 15 cm thick concrete slab k 2 w m k that is 15 m wide and 20 m long.

The roof of a house consists of a 15 cm thick concrete slab k 2 w m k that is 15 m wide and 20 m long the convection heat transfer coefficients on the inner and outersurfaces of the roof are 5 and 12 w m 2 k respectively. The average ambient air and the night sky temperatures for the entire night are predicted to be 6 c and 260 k respectively. 1 105 the roof of a house consists of a 15 cm thick concrete slab k 2 w m k that is 15 m wide and 20 m long. The roof of a house consists of 15 cm thick concrete slab k 2 w mk that is 15 m wide and 20 m long.