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psychrometric chart

   Also found in: Wikipedia 0.01 sec.
psychrometric chart [¦sī·krə¦me·trik ′chärt]
(thermodynamics)
A graph each point of which represents a specific condition of a gas-vapor system (such as air and water vapor) with regard to temperature (horizontal scale) and absolute humidity (vertical scale); other characteristics of the system, such as relative humidity, wet-bulb temperature, and latent heat of vaporization, are indicated by lines on the chart.
psychrometric chart
A chart showing the relationship between dewpoint temperature, drybulb temperature, wet bulb temperature, humidity ratio, and relative humidity.
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[FIGURE 3 OMITTED] To better appreciate the problem of using outdoor air with high ambient humidity in an air-side economizer for a data center, we need to look at a psychrometric chart and at the differences between the standard office cooling process and a data center cooling process.
Dehumidification of outdoor air in datacom environments for air-side ... by Davidson, Thomas A / ASHRAE Transactions
Thermodynamic Properties of Dry Air, Moist Air and Water and SI Psychrometric Charts.
A twenty-first century molar mass for dry air by Gatley, Donald P.; Herrmann, Sebastian; Kretzschmar, Hans-Joachim / HVAC & R Research
In addition, the unit itself has a psychrometric chart on its cover and a humidity calculator slide rule in the carrying case.
A superbly accurate motorized psychrometer by Balsamo, James J., Jr. / Journal of Environmental Health
 
 
 
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