APPENDICES
APPENDIX 2
UNITS AND CONVERSION FACTORS
|
|
|
| Length | 1 inch | = 0.0254 m |
| 1 ft | = 0.3048 m | |
| Area | 1 ft2 | = 0.0929m2 |
| Volume | 1 ft3 | = 0.0283 m3 |
| 1 gal Imp | = 0.004546 m3 | |
| 1 gal US | = 0.003785 m3 = 3.785 litres | |
| 1 litre | = 0.001 m3 | |
| Mass | 1 lb | = 0.4536 kg |
| 1 mole | molecular weight in kg | |
| Density | 1 lb/ft3 | = 16.03 kg m-3 |
| Velocity | 1 ft/sec | = 0.3048 m s-1 |
| Pressure | 1 lb/m2 | = 6894 Pa |
| 1 torr | = 133.3 Pa | |
| 1 atm | =
1.013 x 105 Pa = 760 mm Hg |
|
| 1 Pa | = 1 N m-2 = 1 kg m-1 s-2 |
|
| Force | 1
Newton 1 lb ft s-2 |
=
1 kg m s-2 = 1.49 kg m s-2 |
| Viscosity | 1 cP |
= 0.001 N s m-2 = 0.001 Pa s |
| 1 lb/ft sec | =
1.49 N s m-2 = 1.49 kg m-1 s-2 |
|
|
|
| Energy | 1 Btu | = 1055 J |
| 1 cal | = 4.186 J | |
| Power | 1
kW 1 W |
=
1 kJ s-1 = 1 J s-1 |
| 1 horsepower |
= 745.7 W =
745.7 J s-1 |
|
| 1 ton refrigeration | = 3.519 kW | |
| Temperature units | (°F) | = 5/9 (°C) = 5/9 (K) |
| Heat-transfer coefficient | 1 Btu ft-2 h-1 °F-1 | = 5.678 J m-2 s-1 °C |
| Thermal conductivity | 1 Btu ft-1 h-1 °F-1 | = 1.731 J m-1 s-1 °C-1 |
| Constants | p | 3.1416 |
| s | 5.73 x 10-8 J m-2s-1K-4 | |
| e (base of natural logs) | 2.7183 | |
| R | 8.314
kJ mole-1 K-1 or 0.08206 m3 atm mole-1 K-1 |
(k) kilo = 103,
(H) Hecto = 102
(m) milli = 10-3
(m) micro = 10-6
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