Humid air is cooled under equal pressure, so that the unsaturated water vapor originally contained in the air becomes the temperature of saturated water vapor, or when the temperature of the air decreases to a certain temperature, the unsaturated water vapor originally contained in the air The saturation state is reached (that is, the water vapor starts to liquefy, and liquid condenses out). This temperature is the dew point temperature of the gas.
Pressure dew point means that a gas with a certain pressure is cooled to a certain temperature, and the unsaturated water vapor contained in it becomes saturated water vapor. This temperature is the pressure dew point of the gas.
The atmospheric dew point refers to the temperature at which the gas is cooled to the temperature at which the contained unsaturated water vapor becomes saturated water vapor and precipitates under standard atmospheric pressure.
In the air compressor industry, dew point indicates the dryness of the gas.
