The surface temperature of a swimming pool on a warm day ...
The surface temperature of a swimming pool on a warm day is 25ºC and the temperature at the bottom is 15ºC. If the swimming pool has a surface area of 620 m2 and a depth of 1.5m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the swimming pool.
[Thermal conductivity of water (k) = 0.6071 Wm-1K-1]
2.5kw
250kw
300kw
3.0kw
Correct answer is A
L=1.5m, A=620m2, ø=25-15=10°c
K=0.6071 , Wm−1k−1 , qt =?
qt =KA, \frac{►t}{L}
where k is the thermal conductivity constant and \frac{q}{t} is the rate of heat transfer
=\frac{q}{t}=0.6071×620×\frac{10}{1.5}
\frac{q}{t} = 2509.35w ≈ 2.5kw