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In a cooling tower, the water is cooled principally by

  • A.evaporation of a small part of it
  • B.conduction into the tower packing
  • C.radiation out to the surroundings
  • D.compression of the air passing through

Answer: A

The latent heat of the small evaporated fraction removes far more energy than the sensible heat transfer. The lowest temperature the water can approach is the wet bulb temperature of the air. A few per cent of the flow evaporating does the work.

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