2.5 5
10
(h
10
15
t Sa
60
n
ur
io at
pe
m
te
p
tu
a er
re
0.8 4
% 6
6
0.8
%
50 %
40
Dry bulb temperature °C
20
0%
30%
8
30
y umidit lative h
0.8 10% re
C
re °
atu
per
em
lb t
t bu
we
20%
25
40
olu 2v
2
0.8
0
0.8
0.7
8
2
4
6
8
50
10
12
14
16
18
20
60
70
80
90
100
110
120
0.95 1.0
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
|
er p
0
0.9
Reprinted by permission of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Atlanta, GA; used with permission.
20
25
22
24
26
28
30
0.36
Appendix 1
FIGURE A–31 Psychrometric chart at 1 atm total pressure.
15
20
°C
80 0.9
Prepared by Center for Applied Thermodynamic Studies, University of Idaho.
10
2.0
5
30
50
En
py
al th
ilo )k
es ul jo
r ai
met md
40
Enthalpy Δh —————— = —— Humidity ratio Δ
am il 70 rk r og
y dr
30
gra
ilo er k
0
0
30 4
20
4.0
0.4
90
100 0.9
0
5.0
3
0.
10.0
– 0.2
–• 1.0 1.5 – 5.0 2.0 4.0 – 2.0 ΔHS – • Sensible heat —————– = —— – 4.0 0.0 Total heat ΔHT – 2.0 1.0 1.0
0.2
3.0
1.0 0.8 0.7 0.6 0.5
0.1
•
.5
%
–0
90
Sea Level
%
©1992 American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
bic
80
cu me
70
ASHRAE Psychrometric Chart No. 1 Normal Temperature Barometric Pressure: 101.325 kPa
cen84959_ap01.qxd 4/27/05 3:00 PM Page 929
929
ry a ir
ΔHS Sensible heat —————– = —— Total heat ΔHT Humidity ratio () grams moisture per kilogram dry air