Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Air - Humidifying with Steam, SI units

Using steam to humidify air.

The amount of vapor in 100 m3 air volume is indicated below.

For full table - rotate the screen!

Air - Humidifying with Steam - SI units
Dry Bulb Temperature (oC)Vapor in Air (kg per 100 m3air)
Relative Humidity (%)
100 85 80 75 70 65 60 55 50 45 40 35 30
32 3.39 2.89 2.72 2.55 2.38 2.19 2.04 1.93 1.7 1.53 1.36 1.19 1.02
31 3.22 2.73 2.57 2.41 2.25 2.1 1.93 1.77 1.61 1.45 1.29 1.13 0.97
30 3.05 2.59 2.44 2.29 2.13 1.97 1.83 1.67 1.52 1.37 1.22 1.07 0.91
29 2.89 2.45 2.31 2.17 2.02 1.88 1.73 1.59 1.45 1.3 1.16 1.01 0.87
28 2.73 2.32 2.19 2.05 1.91 1.78 1.64 1.5 1.37 1.23 1.1 0.96 0.82
27 2.59 2.2 2.07 1.94 1.81 1.68 1.55 1.42 1.29 1.16 1.03 0.91 0.78
26 2.45 2.08 1.96 1.83 1.71 1.59 1.47 1.34 1.22 1.1 0.97 0.86 0.73
25 2.31 1.97 1.85 1.73 1.62 1.5 1.39 1.27 1.16 1.04 0.93 0.81 0.69
24 2.19 1.86 1.75 1.64 1.53 1.42 1.31 1.2 1.09 0.98 0.87 0.77 0.66
23 2.06 1.76 1.63 1.55 1.45 1.34 1.24 1.14 1.03 0.93 0.83 0.72 0.62
22 1.95 1.66 1.56 1.46 1.36 1.27 1.17 1.07 0.98 0.88 0.78 0.68 0.59
21 1.84 1.56 1.47 1.38 1.29 1.2 1.1 1.02 0.92 0.83 0.74 0.67 0.55
20 1.74 1.48 1.39 1.3 1.22 1.13 1.04 0.98 0.87 0.78 0.69 0.61 0.52
19 1.63 1.39 1.31 1.23 1.15 1.06 0.98 0.9 0.82 0.74 0.65 0.57 0.49
18 1.54 1.31 1.24 1.16 1.08 1 0.93 0.85 0.77 0.69 0.62 0.54 0.46
17 1.45 1.24 1.16 1.09 1.02 0.94 0.87 0.8 0.73 0.65 0.59 0.51 0.44
15 1.29 1.1 1.03 0.97 0.9 0.84 0.77 0.71 0.66 0.58 0.52 0.45 0.39
10 0.94 0.8 0.76 0.71 0.66 0.61 0.57 0.52 0.47 0.43 0.38 0.33 0.28
0 0.49 0.41 0.39 0.37 0.34 0.32 0.29 0.27 0.24 0.22 0.2 0.17 0.15
-5 0.33 0.28 0.26 0.25 0.23 0.21 0.2 0.18 0.16 0.15 0.13 0.11 0.1
-10 0.22 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.06

Note! In a psychrometric chart or in a Mollier diagram the amount of vapor humidity ratio - x - is indicated in kg/kgdry air (kg vapor per kg dry air).  The values above can be transformed to kg/kgdry air by dividing the values with the air density at the actual temperature.

Water Vapor in air vs. dry bulb temperature and relative humidity

Example - Humidifying Air with Steam

Air at 20oC and 30% relative humidity are humidified to 20oC and 80% relative humidity.

From the table above it can be estimated that air at 20oC and 30% relative humidity contains 0.52 kg water vapor per 100 m3 air volume. Air at 20oC and 80% relative humidity contains 1.39 kg per 100 m3 air volume.

The amount of water vapor required per 100 m3 air volume can be calculated like

Amount of Water Vapor = (1.39 kg/100 m3 air volume) - (0.52 kg/100 m3 air volume)

= 0.87 (kg/100 m3 air volume)

Related Topics

  • Air Conditioning Systems

    Design of Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort.

  • Air Psychrometrics

    Moist and humid air calculations. Psychrometric charts and Mollier diagrams. Air-condition systems temperatures, absolute and relative humidities and moisture content in air.

  • HVAC Systems

    Design and sizing of Heating, Ventilation and Air Conditioning systems.

  • Steam and Condensate

    Design of steam & condensate systems with properties, capacities, sizing of pipe lines, system configuration and more.

  • Thermodynamics

    Calculate heat, work, temperature and energy. The thermodynamics of steam and condensate systems. Water and Ice properties.

Related Documents

Search

Search is the most efficient way to navigate the Engineering ToolBox.

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

Translate this Page

Translate this page to Your Own Language .

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

We use a third-party to provide monetization technologies for our site. You can review their privacy and cookie policy here.

You can change your privacy settings by clicking the following button: .

Citation

This page can be cited as

  • The Engineering ToolBox (2003). Air - Humidifying with Steam, SI units. [online] Available at: https://www.engineeringtoolbox.com/steam-humid-air-d_260.html [Accessed Day Month Year].

Modify the access date according your visit.

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter

















































4.19.9

.