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Mass Transfer - Engineering

Q1:

The temperature of water cooled in cooling tower is always __________ temperature of entering air.

A more than the wet bulb

B less than the wet bulb

C equal to the wet bulb

D equal to the dry bulb

ANS:A - more than the wet bulb

The temperature of water cooled in a cooling tower is always less than the wet bulb temperature of the entering air. Cooling towers operate on the principle of evaporative cooling, where a portion of the water being cooled evaporates into the air stream, absorbing heat from the remaining water. The wet bulb temperature represents the lowest temperature that can be achieved through evaporative cooling under prevailing atmospheric conditions. Therefore, the temperature of the water cooled in a cooling tower cannot be lower than the wet bulb temperature of the entering air.