Why is the temperature lower on the wet bulb?

Wet Bulb Temperature – T The adiabatic evaporation of water from the thermometer bulb and the cooling effect is indicated by a “wet bulb temperature” lower than the “dry bulb temperature” in the air. The evaporation from the wet muslin is reduced when air contains more water vapor.

Why is the wet bulb temperature lower than the dry bulb What process cools it off?

The adiabatic evaporation of water from the thermometer and the cooling effect is indicated by a “wet bulb temperature” lower than the “dry bulb temperature” in the air. The evaporation is reduced when the air contains more water vapor.

What is the lowest temperature a cooling tower can produce?

To best understand this, you have to know a little about how a cooling tower works in general and what range and approach is. The coldest temperature that a cooling tower can reach is 4-5° Fahrenheit, higher than the wet-bulb temperature.

Can a cooling tower cool below wet bulb temperature?

An evaporative cooling tower can generally provide cooling water 5°F-7°F higher above the current ambient wet bulb condition. That means that if the wet bulb temperature is 78°F, then the cooling tower will most likely provide cooling water between 83°F- 85°F, no lower.

What is wet bulb temperature in cooling tower?

78°F.
Most cooling towers are capacity rated at a “standard” wet bulb temperature of 78°F. That means on the days when the wet bulb temperature is 78°F, the tower will produce its stated capacity. In other words, a tower rated to produce 135 tons of cooling will produce 135 tons of cooling at a 78°F wet bulb temperature.

What is dry bulb temperature in cooling tower?

The dry bulb temperature is the ambient temperature. The difference between these two temperatures is a measure of the humidity of the air. The higher the difference in these temperatures, the lower is the humidity.

What is approach temperature in cooling tower?

Approach is the temperature of the water leaving the cooling tower (in this case, 85°F nominal) minus the ambient web bulb temperature (78°F wet bulb) or 7°F. This value represents how close the cooling tower gets the water to the wet bulb temperature of the surrounding air.

What is wet bulb approach of a cooling tower?

What is wet bulb temperature?

Wet bulb temperature is the lowest temperature to which air can be cooled by the evaporation of water into the air at a constant pressure. It is therefore measured by wrapping a wet wick around the bulb of a thermometer and the measured temperature corresponds to the wet bulb temperature.

Why does water evaporate in a cooling tower?

A cooling tower is a heat-rejection device, which discharges warm air from the cooling tower to the atmosphere through the cooling of water. The fill provides the surface area to enhance the heat transfer between the water and air, causing a portion of the water to evaporate.