wet bulb temperature

Notes (test preparation) Muhammad Saifullah B.E Chemical (KU-07) WET BULB TEMPERATURE :- The wet-bulb temperature is a type of temperature measurement that reflects the physical properties of a system with a mixture of a gas and a vapor, usually air and water vapor. Wet bulb temperature is the lowest temperature that can be reached by the evaporation of water only. It is the temperature you feel when your skin is wet and is exposed to moving air. Unlike dry bulb temperature, wet bulb temperature is an indication of the amount of moisture in the air. DRY BULB TEMPERATURE :- The dry-bulb temperature is the temperature of air measured by a thermometer freely exposed to the air but shielded from radiation and moisture. Dry bulb temperature is the temperature that is usually thought of as air temperature, and it is the true thermodynamic temperature. It is the temperature measured by a regular thermometer exposed to the airstream. Unlike wet bulb temperature, dry bulb temperature does not indicate the amount of moisture in the air. In construction, it is an important consideration when designing a building for a certain climate. Wet bulb is always less than dry bulb Humidity = % moisture in air. Humid heat = Moisture enthalpy. Loading factor shows the eﬃciency of the cooling tower. Psychometric/hygrometric calculations are used for cooling tower. Page 65

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Notes (test preparation) Muhammad Saifullah B.E Chemical (KU-07)

WET BULB TEMPERATURE:-

The wet-bulb temperature is a type of temperature measurement that reflects the physical properties of a system with a mixture of a gas and a vapor, usually air and water vapor. Wet bulb temperature is the lowest temperature that can be reached by the evaporation of water only. It is the temperature you feel when your skin is wet and is exposed to moving air. Unlike dry bulb temperature, wet bulb temperature is an indication of the amount of moisture in the air.

DRY BULB TEMPERATURE:-

The dry-bulb temperature is the temperature of air measured by a thermometer freely exposed to the air but shielded from radiation and moisture. Dry bulb temperature is the temperature that is usually thought of as air temperature, and it is the true thermodynamic temperature. It is the temperature measured by a regular thermometer exposed to the airstream. Unlike wet bulb temperature, dry bulb temperature does not indicate the amount of moisture in the air. In construction, it is an important consideration when designing a building for a certain climate.

Wet bulb is always less than dry bulb

Humidity = % moisture in air.

Humid heat = Moisture enthalpy.

Loading factor shows the efficiency of the cooling tower.

Psychometric/hygrometric calculations are used for cooling tower.

Page 65

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