Psychrometric chart at 1 atm total...
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Prep
ared
by
Cen
ter
for A
pplie
d T
herm
odyn
amic
Stu
dies
, Uni
vers
ity o
f Id
aho.
1.0
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
0.36
Ent
halp
y—
——
——
—H
umid
ity r
atio
Δh —— Δ�
=
Sensible heat —————–Total heat
ΔHS——ΔHT
=
60
5040
3020
Dry
bul
b te
mpe
ratu
re °C
100
708090100
110
120
Sens
ible
hea
t—
——
——
–To
tal h
eat
ΔHS
——
ΔHT
=
1.0
–•
–5.
0–
2.0
0.0
1.0
2.0
2.5
3.0
4.0
5.0
10.0•
0.1
0.2
0.3
0.4
0.5
0.6
0.8
0.7
1.0
1.5
2.0
4.0
–4.0
–2.0
–1.0
–0.5
–0.2
•
0
Enthalp
y (h)
kiloj
oules
per k
ilogr
am dr
y air
20
30
40
50
60
70
80
90
100
Saturat
ion te
mperat
ure °
C
5
10
15
20
25
30
30
0.94
30
20
15
10
5
0
0.90
0.88
0.86
0.84
0.82
0.80
0.78
28
90%80%
70%
60%
50%
40%
30%
20%
26 24 22 20 18 16 14 12 10 8
10%
rel
ativ
e hu
mid
ity
25 w
et b
ulb
tem
pera
ture
°C
0.92 volume cubic meter per kilogram dry air
Humidity ratio (�) grams moisture per kilogram dry air
6 4 2
ASH
RA
E P
sych
rom
etri
c C
hart
No.
1N
orm
al T
empe
ratu
reB
arom
etri
c Pr
essu
re: 1
01.3
25 k
Pa
©19
92 A
mer
ican
Soc
iety
of
Hea
ting,
R
efri
gera
ting
and
Air
-Con
ditio
ning
Eng
inee
rs, I
nc.
Sea
Lev
el
FIGU
RE A
–31
Psyc
hrom
etri
c ch
art a
t 1 a
tm to
tal p
ress
ure.
Rep
rint
ed b
y pe
rmis
sion
of t
he A
mer
ican
Soc
iety
of H
eati
ng,R
efri
gera
ting
and
Air
-Con
diti
onin
g E
ngin
eers
,Inc
.,A
tlan
ta,G
A;
used
wit
h pe
rmis
sion
.
953APPENDIX 1
cen2932x_ch18-ap01_p907-956.qxd 12/18/09 10:05 AM Page 953
