The phenomenon that enables cooling towers to cool water to a tem
A. Chemical dehumidification
B. Adiabatic evaporative cooling
C. Cooling and dehumidification
D. Sensible cooling
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Right Answer is: B
SOLUTION
Concept:
Cooling tower: It is a heat rejection device that 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.
Sensible cooling: It is the process of extracting sensible heat to the air with an evaporator. The wet-bulb temperature and total heat content of the air decreases 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.
- In a cooling tower, the temperature of the air at the inlet is Wet Bulb Temperature.
