The moisture holding capacity of air increases with temperature. The mass of water vapor present in moist air - to the mass of dry air. Relative humidity in moist air can estimated by measuring the dry and wet bulb temperature. Air - Humidity Measurement from Dry and Wet Bulb Temperature Air - Humidifying with Steam - Imperial UnitsĮstimate the amount of steam required (lb/h in 100 cfm) in humid air. Air - Humidifying by Adding Steam or WaterĪir can be humidified by adding water or steam. Air - Heating, Cooling, Mixing, Humidifying or Dehumidifying Processesīasic air changing state processes - heating, cooling, mixing, humidifying and dehumidifying by adding steam or water - psychometric diagrams and the Mollier charts. Online calculator, figures and tables with dynamic (absolute) and kinematic viscosity for air at temperatures ranging -100 to 1600☌ (-150 to 2900☏) and at pressures ranging 1 to 10 000 bara (14.5 - 145000 psia) - SI and Imperial Units. Air - Diffusion Coefficients of Gases in Excess of Airĭiffusion coefficients (D 12) for gases in large excess of air at temperatures ranging 0 - 400 ☌. Online calculator, figures and tables showing density, specific weight and thermal expansion coefficients of air at temperatures ranging -100 to 1600 ☌ (-140 to 2900 ☏) at atmospheric and higher pressure - Imperial and SI Units. Air - Density, Specific Weight and Thermal Expansion Coefficient vs. Pressure and TemperaturesĪir density at pressure ranging 1 to 10 000 bara (14.5 - 145000 psi) and constant selected temperatures. Altitudeĭensity and specific volume of air varies with elevation above sea level. Air - Composition and Molecular Weightĭry air is a mechanical mixture of nitrogen, oxygen, argon and several other gases in minor amounts. Absolute humidity is the actual mass of water vapor present in the air water vapor mixture.

Ashrae psychrometric chart sea level