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Humidification (Heating or Cooling)
This is the process of introducing moisture into the airstream. In winter, humidification frequently is…
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Governing Equation for Sensible Heating and Cooling
Example Calculate the amount of sensible heat that must be added to 100lb of air…
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Sensible Heating
In HVAC systems, air is typically heated by passing it over a heating coil or…
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Sensible Cooling
Air dew point temperature Tdewpoint is the temperature when air is 100% saturated and water begins…
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Cooling and Heating
In HVAC systems, air is typically cooled by passing it over a cooling coil. Most…
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Measuring Vapour Pressure
Measuring vapour pressure is very difficult without complex laboratory instrumentation. However, it can be relatively…
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Measuring Dew Point
Two types of dew point sensors are commonly used today: a condensation dew point method…
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Measuring Humidity
The instruments used to measure humidity are called hygrometers. The simplest form of hygrometer is…
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Measuring Wet Bulb Temperature
Wet bulb temperature is easily measured with a standard thermometer which has its sensing bulb…
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MEASURING PSYCHROMETRIC VARIABLES
All psychrometric properties of air are determined by measuring two psychrometric variables: for example, if…