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A mechanical draft cooling tower is to be designed to cool 75000 kg hr of water from 45oC using 62500 kg of dry air per hour 24oC is suggested as the design air wet bulb temperature Calculate the

A mechanical draft cooling tower is to be designed to cool 75000 kg/hr of water from 45oC using 62500 kg of dry air per hour. 24oC is suggested as the design air wet bulb temperature. Calculate the number of transfer units and hence the height of the packed section if the height of a transfer unit for the condition stated above is 4 m. It may be assumed that the liquid phase resistance to heat transfer is negligible. Temperature t oC - saturated enthalpy in kcal/kg dry air (H) data is as follows:t oC
24
29
32.5
38
43.5
H
20
25
28
36
46
 

Jul 24 2020 View more View Less

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