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Pounds of moisture per pound of dry air

`

Grains of moisture per pound of dry air

`

PSYCHROMETRIC CHART Normal Temperature I-P Units SEA LEVEL

180

BAROMETRIC PRESSURE: 29.921 in. HG

.025 45

170

.024 0.40 .023

160

80

.022

40

150 .021 140

.020

14.5

75

0.50 .019

Btu

90%

35

-0.1

130 .018

-0.2 B tu

80%

120 70

30

0.45

0.55

.017 0.60 .016

110

0.65 .015

60

%

OF D UN PE

tu

TU

2B

-B

-.08

Btu

-.06

Btu

-.04

Btu

-.0

LP Y

-0.3 Btu - Enthalpy deviation Btu per pound of dry air

R

PO

IR RY A LB. D

%

40

45 30%

40

.011 70

13.0

0.1

25

.009 .008 50

.007 .006

40

.005 30

20%

.004

Btu 0.2

Btu

`

12.5

Wet-Bulb Dewpoint or Saturation Temperature F

.010

60

35 30

10%

Btu

.003

20

MIDITY

0.3

E HU RELATIV

.002 10

tu .4 B

0

.001 0

`

Dry-Bulb 20 Temperature F

25

30

35

40

Below 32 F, properties and enthalpy deviation lines are for ice.

45

50

55

60

65

70

75

80

85

0.80

90

95

100

0.90 0.95 1.00

`

PER

5

13.5

50

.FT.

TH A

80

- CU

EN

.012

UME

55

0%

0.75

0.85

VOL

20

.013

90

14.0

60

15

10

.014

65 25

DR

Y

AI

R

70

%

0.70

100

105

110

Chart by: HANDS DOWN SOFTWARE, www.handsdownsoftware.com

.000

Sensible Heat Factor

PSYCHROMETRIC CHART Normal Temperature SI Units SEA LEVEL

90

BAROMETRIC PRESSURE: 101.325 kPa

24

.024

22

.022

0.35

80

0.40

70

25 20

.020

18

16

90%

50

80

40

14

0.88

%

20

R 70

15

%

K

0.86

60

-K

L HA

20

C ME -

T

EN

10

U VOL

PY

O AM GR 3 O 0 IL

%

UBIC

50 10

8

E ER P

MET

0.84

%

40

R KG

10

.012

.010

.008

6

.006

4

.004

2

.002

AIR

0.82

30%

0

0

.014

DRY

5

.016

0.80

20%

-5 0.78

MIDITY

TIVE HU

10% RELA

0.76

0 -10

-5

0

Below 32 F, properties and enthalpy deviation lines are for ice.

5

10

15

20

25

30

35

40

Chart by: HANDS DOWN SOFTWARE, www.handsdownsoftware.com

.000

0.50

0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00

`

R

E JP

12

%

Y

R FD

AI

.018

HUMIDITY RATIO - KILOGRAMS MOISTURE PER KILOGRAM DRY AIR

0.90

60

HUMIDITY RATIO (or Specific Humidity) GRAMS OF MOISTURE PER KILOGRAM OF DRY AIR

0.45

Sensible Heat Factor