Page 612 - Handbook of Electrical Engineering

CONVERSION FACTORS FOR THE SI SYSTEM OF UNITS 605

Convert to Multiply by

USbarrels/day USgal/min 0.029
3
USbarrels/day ft /h 0.2339
calorific value, btu/ft 3 kJ/m 3 37.2589
◦
specific heat capacity J/kg- CorK 4186.8
◦
(btu/lb- F)
3 ◦
specific heat capacity kJ/m - CorK 67.0661
3 ◦
(btu-s/ft - F)
◦
specific entropy J/kg- CorK 4186.8
◦
(btu/lb- F)
2
◦
thermal resistivity m -s- C/J-m 6.93347
2
◦
(ft -h- F/btu-in)
specific energy J/kg 2327.0
(btu/lb)
heat flow rate W or J/s 0.293071
(btu/hour)
heat flow rate W 1.163
(kcal/hour)
◦
thermal conductivity btu/ft-h- R 0.2388
◦
(kW/m- K)
I.5 INTERNATIONAL STANDARDS ORGANISATION (ISO) CONDITIONS
Standard altitude 0.0m, sea level
Standard pressure 29.9212 inches of mercury
1.013250 bar or 14.6959 lbf/in 2
Standard relative humidity 0.0
◦
◦
Standard temperature 15.0 C or 59.0 F

I.6 STANDARD TEMPERATURE AND PRESSURE (STP) CONDITIONS

Standard pressure 29.9212 inches of mercury
1.013250 bar or 14.6959 lbf/in 2
◦
◦
Standard temperature 0.0 C or 32.0 F

I.7 REGULARLY USED CONSTANTS

Constants Numerical value Symbol
◦
Absolute zero temperature −273.16 C
◦
Absolute zero temperature −459.69 F
◦
Absolute zero temperature 0.0 K
(continued overleaf )