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 ?
For the reference probe and CRAC unit sensors, the temperature and relative humidity readings were converted to dew-point temperatures.
The condensate measurement was used as a method for latent capacity evaluation, because at higher ambient conditions the difference in dew-point temperature between the inlet and outlet of the indoor unit was small, resulting in significant uncertainty.
I supplement my dew shield with active dew-busting tools that warm the optics until they are above the dew-point temperature.
The total uncertainty in the dew-point temperature measurement was approximately [+ or -] 0.
8[degrees]C) as the supply air temperature is that the dew-point temperature of air at 75[degrees]F (23.
This finding is explained by the fact that lower moisture content in the air reduces the dew-point temperature in the exhaust air side, and thus a lower surface temperature is required to produce condensation and frosting.
As seen, the temperature of the refrigerant from the first-stage expansion caused by the capillary tube is designated to be above the corresponding dew-point temperature of the ambient environment.
It was also mentioned that the dew-point temperature of CFB boiler flue gas should be determined.
Although it is not yet a guideline, a preliminary report to ASHRAE's Technical Activities Committee from the MTG suggests that a 60[degrees]F (16[degrees]C) dew-point temperature can be used as a "prudent upper limit" that describes the normal behavior of well-designed and maintained mechanically cooled buildings in any climate during the cooling season.
Trends for average dew-point temperature (Figure 4[a]) are significantly different from those for dry-bulb temperature.
The refrigerant mass flow produced by the compressor increases with increasing suction dew-point temperature and decreasing discharge dew-point temperature.
The properties determined include bubble-and dew-point temperatures, vapor pressure, equilibrium composition of the components, enthalpy, and entropy of the mixtures at saturation pressures.