0.20
0.25
0.30
0.35
0.40
SENSIBLE HEAT RATIO = Qs / Qt
0.45
90
29.0
30
0.50
ET
W
24
28.0
BU
LB
27.0
R
TU
RA
PE
M
TE 0.92
80
0.55
25.0
E
PSYCHROMETRIC CHART
26.0
22
-°
NORMAL TEMPERATURE
SI Units
SEA LEVEL
C
25
24.0
0
70
12
25
20
BAROMETRIC PRESSURE: 101.325 kPa
0.60
23.0
22.0
-:
18
NT
ER
RA
90%
TIO
JP
TU
%
SA
AL
TH
70
60
%
%
50
25
%
%
80
EN
10%
EH
LATIV
EH
TIV
R
A
EL
6%
ITY
8
10
6
5
4
0
5
10
15
20
25
30
35
0.90
13.0
0.95
12.0
1.00
11.0
10.0
9.0
8.0
7.0
6.0
5.0
-5
3.0
-10
2.0
1.0
40
45
50
70
0
14.0
2
2%
Chart by: HANDS DOWN SOFTWARE, www.handsdownsoftware.com
15.0
0.85
4.0
4%
RE
16.0
0.80
80
IR
DRY A
8%
ID
UM
10
17.0
90
ER KG
TER P
-5
E
BIC M
-10
E - CU
-15
0.84
0.80
-20
5
ITY
UMID
0.76
-25
-1
0.74
-30
-20
0
%
30
20%
0.78
0
-25
-1
0.82
5
0
-2
0
-3
-15
1
15
0.75
0
OLUM
0.86 V
15
10
10
0
-1
-5
-5
%
40
5%
12
18.0
55
DRY BULB TEMPERATURE - °C
ENTHALPY - KJ PER KILOGRAM OF DRY AIR
14
EM
KIL
PE
OG
RA
20
DEW POINT TEMPERATURE - °C
20
10
30
20
5
0
19.0
0.70
VAPOR PRESSURE - MM OF MERCURY
- °C
TU
RE
OF
M
RA
16
0.88
15
10
-10
20.0
20
40
-K
0.3
0.1
1.2
2.3
3.5
Dh
DW
PY
7.0
0.5
0.2
0.0
4.7
ENTHALPY
HUMIDITY RATIO
50
0.4
-2.3
- : 8.00
-4. .0
-2
-1.0
.5
-0
-0.4
-0.3
-0.2
-0.1
0
DR
11.7
4
8.0 .0
YA
-4.6
0
0.6
IR
2.0
11
Qs
Qt
21.0
0.65
0.90
SENSIBLE HEAT
TOTAL HEAT
25
60
0.8
SENSIBLE HEAT RATIO = Qs / Qt
1.0
HUMIDITY RATIO - GRAMS MOISTURE PER KILOGRAM DRY AIR
1.0
:
60
50
40
30
20
10
0
0
-1
0
-2
0
-3