Cooling tower utilize which of the phenomenon to cool water below the dry bulb temperature of air?

Question

Cooling tower utilize which of the phenomenon to cool water below the dry bulb temperature of air?

Chemical Dehumidification
Adiabatic Evaporative Cooling
Cooling and Dehumidification
Sensible Cooling

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2025-01-04 04:42

1 Answers

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AhmedNazir · Accepted Answer · 2022-09-04T04:29:57+06:00

Option 2 : Adiabatic Evaporative Cooling

Concept:

Cooling tower: It is a heat rejection device that is used to cool the water stream by evaporating some of the water flow into an air stream.

Adiabatic evaporative cooling: Water cools due to evaporation and air gets heated and humidified. It indicates Adiabatic Humidification in the figure below.

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Sensible cooling: It is the process of extracting sensible heat from the air with an evaporator. The wet-bulb temperature and total heat content of the air decrease and the relative humidity increases. There is no change in dew point or moisture content.

Humidification/Dehumidification: ω (moisture content) increases in humidification and decreases in dehumidification but DBT remains constant.

Chemical dehumidification: In this process, Dry Bulb Temperature (DBT) increases and specific humidity (ω) decreases.