Moist Air - Specific vs. Relative Humidity
Specific humidity of moist air vs. relative humidity, water vapor and air density.
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Humidity is the quantity of water vapor present in air. It can be expressed as an absolute, specific or a relative value.
If we know the relative humidity of the moist air and the water vapor density and the density of the air, the specific humidity can be expressed as:
x = 0.622 φ ρws / (ρ - ρws) 100% (1)
where
x = specific humidity (humidity ratio) of air vapor mixture (kgh2o/kgdry_air)
φ = relative humidity (%)
ρws = density of water vapor (kg/m3)
ρ = density of the moist or humid air (kg/m3)
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Related Topics
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Air Psychrometrics
Moist and humid air - psychrometric charts, Mollier diagrams, air-condition temperatures and absolute and relative humidity and moisture content.
Related Documents
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Air - Absolute Humidity
Absolute humidity is the actual mass of water vapor present in the air water vapor mixture. -
Air - Humidity Ratio
The mass of water vapor present in moist air - to the mass of dry air. -
Humid Air vs. the Ideal Gas Law
Pressure, temperature and volume in a perfect ideal gas like moist air (air with water vapor). -
Mixing of Humid Air
The change in state wwhen mixing moist air - enthalpy, heat, temperature and specific humidity. -
Moist Air - Density vs. Water Content and Temperature
Density of the mix of dry air and water vapor - moist humid air. -
Moist Air - Enthalpy
Sensible and latent heat of moist air. -
Moist Air - Properties
Psychrometric table with humid air properties like saturation pressure, specific volume, enthalpy and entropy. -
Moist Air - Relative Humidity
Relative humidity in moist air is the ratio of partial vapor pressure to air pressure. -
Moist Air - Specific Volume
Specific volume of moist air is defined as the total volume of humid air per mass unit of dry air -
Recommended Relative Humidity
Recommended relative humidity level.
