Page 604 - Modelling in Transport Phenomena A Conceptual Approach

584 APPENDIX E. CONSTANTS AND CONVERSION FACTORS

CONVERSION FACTORS

1 kg/ m3 = 10- g/ cm3 = 10- kg/L
Density
1 kg/ m3 = 0.06243 lb/ ft3
Diffusivity 1 m2/ s = io4 cm2/ s
(Kinematic, Mass, Thermal) 1 m2/ s = 10.7639 ft2/ s = 3.875 x lo4 ft2/ h
1 J = 1 W. s = lN.m = 10-3kJ
Energy, Heat, Work 1 cal = 4.184 J
1 kJ = 2.7778 x kW. h = 0.94783Btu
1 kJ/ kg. K = 0.239 tal/ g. K
Heat capacity
1 kJ/ kg. K = 0.239 Btu/ Ib.OR
1 N = 1 kg. m/ s2 = lo5 g. cm/ s2 (dyne)
Force
1 N = 0.2248 lbf = 7.23275 lb. ft/s2 (poundals)
1W/m2 = 1J/s.m2
Heat flux
1 W/ m2 = 0.31709 Btu/ h. ft2
1W/m2.K = 1 J/s.m2.K
Heat transfer coefficient 1W/m2.K = 2.39 x 10-5cal/s.cm2.K
1 W/m2. K = 0.1761 Btu/ h. ft2."R
1m = 1OOcm = 106,vm
Length
1 m = 39.370 in = 3.2808 ft
1 kg = lOOOg
Mass
1 kg = 2.2046 lb
Mass flow rate 1 kg/ s = 2.2046 Ib/ s = 7936.6 lb/ h

Mass flux 1 kg/ s. m2 = 0.2048 lb/ s. ft2 = 737.3 lb/ h. ft2
Mass transfer coefficient 1 m/ s = 3.2808 ft/ s
1 W = 1 J/ s = lov3 kW
Power
1 kW = 3412.2 Btu/ h = 1.341 hp
1Pa= 1N/m2
Pressure 1 kPa = lo3 Pa = MPa
1 atm = 101.325 kPa = 1.01325 bar = 760 mmHg
1 atm = 14.696 lbf/ in2
1 K = 1.8 OR
Temperature
T( OF) = 1.8T( "C) + 32