dew-point temperature


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dew-point temperature

[′dü ‚pȯint ′tem·prə·chər]
(chemistry)

dew point

dew pointclick for a larger image
If the temperature is +30°C and there is 15 gm of water vapor per kg of dry air and the air is cooled to +20°C, saturation will occur. +20°C is the Dew point. Similarly, Dew point is +33°C if air with 5 gm of water vapor per kg is cooled till it becomes saturated.
The temperature to which a given parcel of air must be cooled at constant pressure and constant-water-vapor content for saturation to occur. It is the temperature at which the saturation vapor pressure of the parcel is equal to the actual vapor pressure of the contained water vapor. Any further cooling usually results in the formation of dew or frost. Also called the dew-point temperature. When this temperature is below 0°C, it is sometimes called the frost point.
References in periodicals archive ?
Finally, trends for average wet-bulb temperature (Figure 5[a]) present an interesting combination of the features of both Figures 3 and 4 (which is not too surprising since, from a mathematical point of view, wet-bulb temperature is between dew-point temperature and dry-bulb temperature).
The total uncertainty in the dew-point temperature measurement was approximately [+ or -] 0.
The temperature is designated to be above the corresponding dew-point temperature of the ambient environment after first-stage expansion to eliminate the condensate problem.
In this particular case it is possible that the temperature of the APH tube falls below the dew-point temperature of flue-gas water steam, and water steam from flue gas condensates on the tubes.
The test data recorded and analyzed indicates that the increased air dew-point temperature results in a greater frost mass deposit rate and an increase in frost thickness.
Compressor Suction and Discharge Dew-Point Temperatures Compressor Operating Conditions Air Conditioner Suction dew-point Lower limit 20 (-6.
The 12 selected typical months for each station were chosen using statistics determined by considering five elements: global horizontal radiation, direct normal radiation, dry-bulb temperature, dew-point temperature, and wind speed.
If the temperature of the evaporator wall becomes lower than the dew-point temperature of air, then condensation of moisture in air takes place.
With the patented concept in mind, the next step, proposed by the inventor, is to make each of the above stages more efficient with the result that the supply air could approach dew-point temperature.
The bold, solid line indicates the dew-point temperature of indoor air at 22[degrees]C over a range of relative humidity values.
As such any start-up regiment for an ACB system must involve an early drying-out of building air by the early and separate operation of the DOA system, with chilled water going to ACB terminals only after space dew-point temperatures have been lowered below ACB terminal temperatures.
Per ANSI/ARI Standard 1200-2006, the adjusted dew-point temperature was determined as the saturated temperature of the refrigerant at the evaporator pressure minus 2[degrees]F (1.