Removing Heat with Air
The wet bulb temperature is a measure of the total heat in moist air - the mixture of dry air and vapor.
If the initial and final wet bulb temperatures in a heating or cooling processes are known - the heat transported by the air in the processes can be calculated by using the charts below.
Heat Transported by Air - kJ per kg
Example - Heat Removed by Moist Air
Air with initial wet bulb temperature 30oC (green line) is cooled down to a final temperature 10oC. From the diagram above we can estimate that
aprox. 70 kJ
of heat is removed.
Heat Transported by Air - kJ per m3
Heat Transported by Air - Btu per lb
Heat Transported by Air - Btu per Cu. Ft.
Related Topics
• 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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The drying force of air depends on the air moisture holding capacity and the water surface to air evaporation capacity.
Air - Moisture Holding Capacity vs. Temperature
The moisture holding capacity of air increases with temperature.
Air - Specific Heat vs. Temperature at Constant Pressure
Online calculator with figures and tables showing specific heat (Cp and Cv) of dry air vs. temperature and pressure. SI and imperial units.
Air - Thermophysical Properties
Thermal properties of air at different temperatures - density, viscosity, critical temperature and pressure, triple point, enthalpi and entropi, thermal conductivity and diffusivity and more.
Air Heating Systems
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Cooling and Heating Equations
Latent and sensible cooling and heating equations - imperial units.
Dry Air - Thermodynamic and Physical Properties
Thermodynamic properties of dry air - specific heat, ratio of specific heats, dynamic viscosity, thermal conductivity, Prandtl number, density and kinematic viscosity at temperatures ranging 175 - 1900 K.
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Drying temperature and time for products like food, coffee, fruits, lumber and more.
Humid Air - Heating
Enthalpy change and temperature rise when heating humid air without adding moisture.
Latent Heat Flow
Latent heat is the heat when supplied to or removed from air results in a change in moisture content - the temperature of the air is not changed.
Liquids - Vapor Pressures
Vapor and saturation pressure for some common liquids.
Moist Air - Enthalpy
Sensible and latent heat of moist air.
Moist Air - Relative Humidity
Relative humidity in moist air is the ratio of partial vapor pressure to air pressure.
Moist Air - Vapor Pressure
Vapor pressures vs. dry and wet bulb temperatures in moist air.
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Saturation pressure of water vapor in moist air vs. temperature.
Water - Saturation Pressure vs. Temperature
Online calculator, figures and tables with water saturation (vapor) pressure at temperatures ranging 0 to 370 °C (32 to 700°F) - in Imperial and SI Units.