MoistAirTab™ Example 1 - Moisture Content
Example 1
Moist air exists at a dry-bulb temperatuer of 40°C and a wet-bulb temperature of 20°C at standard atmospheric pressure.
- What are different ways to express the moisture content
- What are the other thermodynamic properties
Solution
The solution is presented below as a table generated from Excel. The gray shaded areas represent the input data.
| Input Conditions | Units | |
| Dry bulb temperature | °C | 40 |
| Wet bulb temperature | °C | 20 |
| Total pressure | bar | 1.01325 |
| | |
| 1. Expressions of Moisture Content: | | |
| Relative humidity | % | 14.01% |
| Humidity ratio | kgw/kgdry air | 0.006448 |
| Dew point temperature | °C | 7.4829 |
| Water mole fraction | | 0.0103 |
| Water weight fraction | | 0.0064 |
| Parital pressure of water | bar | 0.0104 |
| | |
| 2. Thermodynamic Properties of Moist Air | | |
| Enthalpy | kJ/kgdry air | 56.856 |
| Entropy | kJ/(kgdry air.K) | 0.200 |
| Volume | m3/kgdry air | 0.896 |