How much steam is needed to transform air at 30oF with 100% humidity to air at 70oF with 40% humidity?
The difference (2.76 - 1.67) = 1.09 lb/h is the amount of steam needed for 100 cfm/h air flow.
This table neglects the sensible heat required to heat cold air to final state. In the example above the heat required to heat 100 cfm dry air from 30oF to 70oF must be added. The heat can be added as dry heat with heating panels or similar, or in general more convenient by adding more steam.
Moist and humid air - psychrometric charts, Mollier diagrams, air-condition temperatures and absolute and relative humidity and moisture content.
Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more.
Absolute humidity is the actual mass of water vapor present in the air water vapor mixture.
Basic air changing state processes - heating, cooling, mixing, humidifying and dehumidifying by adding steam or water - psychometric diagrams and the Mollier charts.
Air can be humidified by adding water or steam.
Using steam to humidify air.
The mass of water vapor present in moist air - to the mass of dry air.
The moisture holding capacity of air increases with temperature.
Psychrometric chart for air at barometric pressure 29.921 inches of Mercury and temperature ranging 20oF to 120oF.
Air in the steam will lower the surface temperatures in heat exchangers - and less heat will be transferred.
Sprayed coils, spinning discs and steam humidifiers.
Density of the mix of dry air and water vapor - moist humid air.
Calculate steam heated air systems.
Calculating the amount of steam in non-flow batch and continuous flow heating processes.
An introduction to vapor and steam.
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