Conversion Factors

AppendixA

ConversionFactors Abbreviations. A = a n g s t r o m , a t m = s t a n d a r d a t m o s p h e r e , 760 m m of H g at 0~ cal -calorie ( g r a m ) , cm = c e n t i m e t e r , deg = d e g r e e , gal = gallon, U.S. liquid, g m ( a n d g) = gram, g m o l e = g r a m - m o l e , J = joule, kcal = kilocalorie, kg - k i l o g r a m , kJ = kilojoule, k m = k i l o m e t e r , k W = kilowatt, 1 = liter, lb = a v o i r d u p o i s p o u n d , m -- m e t e r , mi = mile (U.S.), m m - m i l l i m e t e r , N = n e w t o n , oz -- a v o i r d u p o i s ounce, p m o l e - p o u n d m o l e , pt - pint, r a d = r a d i a n , rev -- r e v o l u t i o n , s -- second, t o n = s h o r t U.S. ton, V = volt, W = watt. O t h e r s are as usual.

LENGTH in.

12-~-

"

0.3937 m . cm

30.48

2.54 .cm m.

3.28 ft m

AREA in.2 144 f-~-

cm e 929 ~

cm 2 6.452 in.---i

VOLUME in. 3 1728 f-i3in. 3 231 ~ - ~

7.481 8m ~ gaJ

~gal

3.7854

103 1 ~-5

~al

1

28.317-ft 3

in. 3 61.025 ~

1

545

Compressors: Selection and Sizing

546

DENSITY

lb/ft 3 1728 lb/in. 3

kg/m 3 16.018 ~

kg/m 3 1000 gm/cm 3

ANGULAR

2~r = 6.2832 rad rev

57.3 deg ~

rpm 9'549 rad/sec SPEED

TIME

60

s

3600 _z_ hr

min

60

m/s

min

152.4 cm/min ips

0.3048 f--p-~

hr

FORCE, MASS

Ibm 2.205 --~-g

oz 1 16~bm

105

dynes N

1000 lbf kip

28.35 gm oz

2000 lbm

453.6 gm lbm

ton

1000

907.18 "~----~-~ ton

kg metric ton

PRESSURE

14.696 psi atm

101,325N/m 2 atm

13.57 in. H20(60~ in. Hg(60~ 1.01325

bar atm

105 N/m2 bar

703.07kg/m2 psi

psi 0.4898. in. Hg(60~ 0.0731 kg/cm2 psi

6 8 9 4 . N/m2 8~ psi 760

29.921in" Hg(0~ atm

47.88N/m2 psf

51.715 mm Hg(0~ psi

14 504 psi " bar

mm Hg(0~ atm

406.79

0.0361

psi in. H20(60~

in. H20(39.2~ atm

1.0332 kg/cm2 atm

ENERGY AND POWER

778.16 f_t l b 15tu

2544.4.t----U--U B hp-hr

Btu 3412.2~ kW-hr

5050 hp-hr ft-lb

ft-lb 737.562-kW-s

550 ft-lb hp-s

Btu 56.87~ kW-min

3600

UNIVERSAL GAS CONSTANT

ft-lb 1545.32~ pmole-~ 1.9859

cal gmole-K

kJ 8.3143~ kgmole-K 10.731 psi-ft3 pmole-~

1.9859

Btu pmole-~

Btu 42.4 hp-min

ft-lb 33,000hp_min

kJ kW-hr

kW hp

0.746