Moist Air Properties

Psychrometric Table of Moist Humid Air Properties

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Properties as

are indicated in the table below:

Temperature Saturation Pressure
(N/m2)
Humidity ratio at Saturation
(kgH2O/kgdry air)
Specific Volume Specific Enthalpy Specific Entropy
(kJ/kg dry air)
oC oF Dry Air
(m3/kg)
 Saturated Mixture
(m3/kg)
Dry Air
(kJ/kg dry air)
Saturated Mixture
(kJ/kg dry air)
-40 -40 12.84 0.000079 0.660 0.660 -22.4 -22.2 -90.7
-30 -22 38 0.00023 0.688 0.688 -12.3 -11.7 -46.7
-25 -13 63.25 0.00039 0.702 0.703 -7.27 -6.3 -24.7
-20 -4 103.2 0.00064 0.716 0.717 -2.23 -0.67 -2.2
-15 5 165.2 0.0010 0.731 0.732 2.79 5.3 21.2
-10 14 259.2 0.0016 0.745 0.747 7.8 11.8 46.1
-5 23 401.5 0.0025 0.759 0.762 12.9 19 73.4
0 32 610.8 0.0038 0.773 0.778 17.9 27.4 101.1
5 41 871.9 0.0054 0.788 0.794 22.9 36.5 137.4
10 50 1227 0.0077 0.802 0.812 27.9 47.2 175.5
15 59 1704 0.011 0.816 0.830 33 60 220.2
20 68 2337 0.015 0.830 0.850 38 75.4 273.3
25 77 3167 0.020 0.844 0.872 43 94.4 337.4
30 86 4243 0.027 0.859 0.896 48.1 117.8 415.6
35 95 5623 0.037 0.873 0.924 53.1 147.3 512.2
40 104 7378 0.049 0.887 0.957 58.1 184.5 532.3
45 113 9585 0.065 0.901 0.995 63.2 232 783.1
50 122 12339 0.087 0.915 1.042 68.2 293 975.3
55 131 14745 0.12 0.929 1.1 73.3 372 1221
60 140 19925 0.15 0.944 1.175 78.3 478 1544
65 149 25014 0.21 0.958 1.272 83.3 621 1974
70 158 31167 0.28 0.972 1.404 88.4 720 2565
75 167 38554 0.38 0.986 1.592 93.4 1110 3413
80 176 47365 0.55 1 1.879 98.5 1557 4711
85 185 57809 0.84 1.015 2.363 103.5 2321 6893
90 194 70112   1.03 3.340 108.6 3876 11281

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Related Topics

  • Air Psychrometrics Air psychrometrics are the study of moist and humid air and the change of air condition - psychrometric charts, Mollier diagrams, air temperature and absolute and relative humidity, moisture content ..

Related Documents

  • Specific Volume of Moist Air Specific volume is defined as the total volume of humid air per mass unit of dry air. 
  • Pressure in Moist Air - Daltons Law The pressure in a mixture of dry air and water vapor - humid or moist air - can be estimated by using Daltons Law
  • Absolute Humidity of Air Humidity or moist is the water vapor present in air. Common used terms are the Absolute, Specific and Relative Humidity.
  • Enthalpy of Moist and Humid Air The enthalpy of moist and humid air consist of sensible heat and latent heat. The enthalpy is important for calculating cooling and heating processes

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