What can you assume about the amount of water vapor in the air if there is no difference between the wet and dry bulb readings of a psychrometer?
When the air is saturated with water vapor, then the water on the wet bulb cannot evaporate. Therefore, there is little difference in the temperature readings of the dry and wet bulbs of the psychrometer. In other words, the relative humidity is 100%.
What does it mean if the water does not evaporate from the wet bulb thermometer?
If the relative humidity is 100%, no water can evaporate, and cooling by sweating or evaporation is not possible. When relative humidity is 100%, a wet-bulb thermometer can also no longer be cooled by evaporation, so it will read the same as an unwrapped thermometer.
What is the purpose of a wet bulb on a sling psychrometer?
A sling psychrometer is an instrument that measures the relative humidity and dew point in an area. A sling psychrometer has two thermometers: a wet bulb and a dry bulb. The wet bulb has a cotton wick over the bulb of the thermometer, which is moistened with room temperature water. The dry bulb is simply a thermometer.
How do you calculate the depression of a wet bulb?
A quick technique that many forecasters use to determine the wet-bulb temperature is called the “1/3 rule”. The technique is to first find the dew-point depression (temperature minus dew-point). Then take this number and divide by 3. Subtract this number from the temperature.
What is the difference between dew point and wet bulb temperature?
The wet bulb temperature is always lower than the dry bulb temperature but will be identical with 100% relative humidity (the air is at the saturation line). The Dew Point is the temperature at which water vapor starts to condense out of the air (the temperature at which air becomes completely saturated).
What is the difference between cooling and dehumidifying?
The cooling effect of the air conditioner is the main reason these machines are used. So in one sentence, the difference between dehumidifier and air conditioner is that the dehumidifier decrease the humidity level by drying the air making it warmer and air conditioner similarly removes humidity by cooling the air.