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Psychrometric chart for calculating Lossnay economical effect
Humid air psychrometric chart
(-10 to +50°C, atmospheric pressure 101.325 kPa)
±
∞
1.0
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
0.75
0.76
0.77
0.78
0
The following can be determined from the above calculation results:
Saving of 59.8 kW of the heating load, and 52.6 kW of the cooling load is possible.
The heat source equipment and related ventilator capacity that is equivalent to this saved amount can be reduced, thus the
operation and maintenance costs can also be saved.
Approximately 400,000 yen can be saved in operation and maintenance costs during heating and 370,000 yen during
cooling, for a total savings of approximately 770,000 yen. Furthermore, as 20.2 kW can be saved from the basic power
rates during cooling, approximately 370,000 yen (20.2 × 1,560 ¥/month × 12 months) can be saved annually.
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
0.79
0.80
0.81
0.82
14.6
CHAPTER 3
19
20 21
22
23
24
25
26
27
28
29
30 31
32
33
Dry bulb temperature t [°C]
0.83
0.84
0.85
0.86
20
26
27.89
33
General Technical Considerations
34
35
36
37
38
39
40 41
42
43
44
45
46
47
48
0.87
0.88
0.89
0.90
0.037
0.036
5.5
0.035
0.034
0.033
5.0
0.032
0.031
0.030
4.5
0.029
0.028
0.027
0.026
4.0
0.025
0.024
0.023
3.5
0.022
0.021
0.0203
0.020
3.0
0.019
0.018
0.017
2.5
0.016
0.015
0.0146
0.014
0.013
2.0
0.012
0.011
0.0105
0.010
1.5
0.009
0.008
0.0072
0.007
1.0
0.006
0.005
0.005
0.004
0.5
0.003
0.002
0.0018
0.001
0.1
0.000
0.0
49
50
T. FUJITA
1987
0.91
25
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