What causes the difference in the wet and dry bulb reading on the thermometers of a sling psychrometer?

What causes the difference in the wet and dry bulb reading on the thermometers of a sling psychrometer?

It contains two thermometers, one of which is covered with a wick saturated with ambient temperature liquid water. When the sling psychrometer is spun rapidly in the air, the evaporation of the water from the wick causes the wet bulb thermometer to read lower than the dry bulb thermometer.

Why is the wet bulb temperature always lower?

Wet Bulb Temperature – T 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 difference between dewpoint 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 dry and 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. The dry bulb temperature is the ambient temperature. The difference between these two temperatures is a measure of the humidity of the air.

What does wet bulb mean in HVAC?

Wet Bulb – The lowest temperature that can be reached by the evaporation of water only, measuring humidity. Dew Point – the temperature to which the ambient air (Dry Bulb) must be cooled to reach 100% relative humidity – Saturation.

When air is saturated with water vapor that means?

Relative humidity

At what stage does air become saturated?

dew point

Which air temperature can hold the greater amount of water vapor?

Looking at your Capacity of Saturated Air table, you can see that as air temperatures rise, there is an increase in the ability of the air to hold moisture. At 80 degrees F the capacity of air increases to where it can hold 21.537 g/kg of water vapor.

When air is saturated it Cannot hold?

When air is saturated, it cannot hold any more water vapour.