The temperature of the wet bulb thermometer at equilibrium with a constant flow of ambient air at a rate of 2.5 to 10.0 meters per second.
The temperature of the wet thermometer bulb in a wet and dry bulb hygrometer. The wet bulb is surrounded by wet fibres and evaporation of water from the fibres cools the wet bulb. The rate of evaporation depends on the relative humidity of the air.
The most accurate way of measuring relative or absolute temperature is to use two thermometers, one of which is kept wet by a pure water wick surrounding the bulb. Except at 100% humidity, the wet bulb will always indicate a lower temperature than the dry one. The conversion from the two temperature readings to either humidity is done by either tables or a mathematical formula.
The temperature a sample of air would have if cooled adiabatically to saturation at constant pressure by evaporation of water into it, all latent heat being supplied by the sample of air.
The air temperature drops after it rains. In the summertime a thunderstorm can break the oppressive heat of the day. As it precipitates, evaporation occurs and the air temperature drops. The wet bulb temperature is the temperature at which no more evaporation will occur, and thus no further decrease in the temperature. The air will continue to cool until the air can evaporate no more moisture. The temperature, when the cooling continues until the evaporation stops and the air becomes saturated, is the wet bulb temperature.
The temperature an air parcel would have if cooled to saturation at a constant pressure by evaporation of water into it.
Is used in psychrometry and is the temperature recorded by a thermometer whose bulb has been covered with a wetted wick and whirled on a sling psychrometer. Taken with the dry bulb, it permits determination of relative humidity of the atmosphere. ( 030)
The temperature reading using a thermometer having a moist sock covering, the temperature where secondary damages will occur.
The lowest temperature that can be obtained by evaporating water into the air at constant pressure. The name comes from the technique of putting a wet cloth over the bulb of a mercury thermometer and then blowing air over the cloth until the water evaporates. Since evaporation requires heat, the thermometer will cool to a lower temperature than a thermometer with a dry bulb at the same time and place. Wet bulb temperatures can be used along with the dry bulb temperature to calculate dew point or relative humidity.
Air temperature in ° F as measured by a thermometer with a bulb covered by a damp wick.
(Tw) - An easily measurable quantity (using a sling psychrometer) which indicates the effect of evaporative cooling on temperature; used to determine relative humidity.
the temperature of air as registered by a thermometer whose bulb is covered by a water wetted wick. Units are °F.
When a wet wick is placed over a standard thermometer and air is blown across the surface, the water evaporates and cools the thermometer below the dry-bulb temperature. This cooler temperature (called the wet-bulb temperature) depends on how much moisture is in the air.