10 20 30 40 50

60

70

80

90

100

110

110

120

120

ENTHALPY - KJ PER KILOGRAM OF DRY AIR

10

20

30

40

50

60

70

80

90

100

ENTHALPY - KJ PER KILOGRAM OF DRY AIR

SATURATION TEMPERATURE - °C

5 10

15

20

25

30

35

40

45

50

DR

Y B

UL

B T

EM

PE

RA

TU

RE

- °

C

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

10% RELATIVE HUMIDITY

20%

30%

40%

50%

60%

70%

80%

90%

5

5

10

10

15

15

20

20

25

25

30 WET BULB TEMPERATURE - °C

30

0.78

0.80

0.82

0.84

0.86 V

OLUME - C

UBIC

METER P

ER K

G D

RY A

IR

0.88

0.90

0.92

0.94

HUM

IDIT

Y R

ATIO

- G

RAM

S M

OIS

TURE P

ER K

ILOGRAM

DRY A

IR

eat

lat H OFF

R R

ASHRAE PSYCHROMETRIC CHART NO.1

NORMAL TEMPERATURE

BAROMETRIC PRESSURE: 101.325 kPa

Copyright 1992

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS, INC.

SEA LEVEL

0

1.0 1.0

∞∞∞∞-

1.5

2.0

4.0

-4.0-2.0

-1.0

-0.5

-0.2

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

-5.0

-2.0

0.0

1.0

2.0

2.5

3.0

4.0

5.0

10.0

-∞∞∞∞∞∞∞∞

SENSIBLE HEAT Qs

TOTAL HEAT Qt

ENTHALPY

HUMIDITY RATIO

∆∆∆∆h

∆∆∆∆W