Catalog 13: Carrier air washers and humidifiers: applied to public office and industrial buildings, with notes on humidity . inciple as the jet con-denser. If air is brought in contact with cold water in sufficientquantities, the temperature of the air will he reduced withoutabsorption of moisture, due entirely to the transmission of theheat from the air to the water. In this case the dry bulb andwet bulb temperatures will both fall gradually until the dewpoint is reached, at which point, of course, both wet and drybulb temperatures register the same. The temperature willthen continue to fall,
Catalog 13: Carrier air washers and humidifiers: applied to public office and industrial buildings, with notes on humidity . inciple as the jet con-denser. If air is brought in contact with cold water in sufficientquantities, the temperature of the air will he reduced withoutabsorption of moisture, due entirely to the transmission of theheat from the air to the water. In this case the dry bulb andwet bulb temperatures will both fall gradually until the dewpoint is reached, at which point, of course, both wet and drybulb temperatures register the same. The temperature willthen continue to fall, depending on the relative amount andtemperature of water used; with a reduction of dew point,necessarily a certain amount of moisture will be given upby the air, thus lowering the dew point and reducing thenumber of grains contained in the air per cti. ft. Physical Laws of Humidifying and Cooling withAir Washers To analyze properly the action of the automatic humiditycontrol, attention is called to a few of the general physical lawsgoverning the humidifying of air by means of air washers. 9590 80 -i 75^70656055 -j50 ^. Cooling by Evaporation: Air is passed through anair washer, with the water being recirculated and not heated,viz.: where the heat necessary for evaporation must be procuredfrom the air. The erroneous statement is often made that a washer willgive 6o or 70 or 80 or even 90 per cent relative statement is incorrect, as no washer when recirculatingthe water will give a constant relative humidity to the air it6 Carrier Air Conditioning Company of America leaving, unless the water is heated sufficiently to give completesaturation. The wet bulb temperature of air is always lowerthan the dry bulb temperature, excepting under conditions ofcomplete saturation. When the air is passed through an airwasher the dry bulb temperature is lowered and the wet bulbtemperature is unaffected. That is, the wet bulb temperatureis eonstant. It is just the same after passin
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