Advanced Radiant Systems Cool-Space CSW-12-VD 소유자 매뉴얼 - 페이지 6

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To understand how the portable evaporative cooler works a basic understanding of psychrometrics is necessary.

Psychrometrics is the branch of thermodynamics devoted to the study of air and water vapor mixtures.

psychrometric chart is a graphical representation of properties of moist air. To illustrate how the unit operates, some of

the relevant properties are described in this section followed by a sample application.

Dry-bulb temperature is measured with a thermometer. Dry-bulb temperature lines on the psychrometric chart are

the vertical lines. The wet bulb temperature is the lowest temperature that can be reached by evaporating water

into the air.

DRY BULB TEMP

Dew-point temperature is the temperature to which a

given sample of air must be cooled so that moisture

will start condensing out of it. When air is saturated,

the dry-bulb, wet-bulb, and dew-point temperatures

will all be equal. The horizontal lines show the dew-

point temperature on the psychrometric chart.

Relative humidity is the amount of moisture in the air

relative to the amount of moisture the air would hold if

saturated at that dry-bulb temperature.

humidity is not the same as relative humidity and is not

used in HVAC design. This graph shows the relative

humidity curves on the psychrometric chart.

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HOW EVAPORATIVE COOLING WORKS

Percent

WET BULB TEMP

DEW POINT TEMP

The