❒ Psychrometric chart
PSYCHROMETRIC CHART
NORMAL TEMPERATURES ATMOS PHERIC PRESSURE 760mm Hg
(-10~+50°C, ATMOS PHERIC PRESSURE 760mm Hg)
Heat inherent moisture ratio
¡ =dh/dx[kcal/kg]
Sensible Heat Factor
Enthalpy h [kcal/kg(DA)]
Specific volume v [m
3
/kg(DA)]
0.75 0.76 0.77 0.78 0.79 0.80 0.81 0.82 0.83 0.84 0.85 0.86 0.87 0.88 0.89 0.90 0.91
-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
Relative humidity ø [%]
Saturated degree ø [%]
Wet Bulb temperature t' [°C]
Dry Bulb temperature t' [°C]
Ice water
Absolute humidity x [kg/kg(DA)]
40
35
30
Steam partial pressure Pw [mmHg]
25
20
15
10
5
1
0
0.000
0.001
0.002
0.003
0.92
0.93
0.94
0.95
0.96
0.004
0.005
0.006
0.007
0.008
0.009
0.010
0.011
0.012
0.013
0.014
0.015
0.016
0.017
0.019
0.020
0.021
0.022
0.023
0.024
0.025
0.026
0.027
0.028
0.029
0.030
0.031
0.032
0.033
0.034
0.035
0.036
0.037
0.018
1
0
-8
-6
-4
-2
-1
0
1
2
3
4
5
6
7
8
9
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11
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34
19
2
3
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5
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9
10
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