Determine thermodynamic wet bulb temperature. Essential for cooling tower sizing, evaporative cooling analysis, and human heat stress monitoring (WBGT).
Evaporation is a cooling process. As water evaporates from a wet wick, it removes heat, lowering the temperature unless the air is already at 100% humidity.
A sustained wet bulb temperature of 35°C (95°F) is considered the limit of human survivability, as the body can no longer shed heat through sweating.
Cooling towers use evaporation to cool water. The theoretical limit of how cold the water can get is the ambient wet bulb temperature, not the dry bulb.