| |
|
| Thermal Units |
| Latent heat of ice |
= 144 BTU/lb |
= 288,000 BTU/ton |
| 1 ton refrigeration |
= 12,000 BTU/hr |
= 288,000/24 hours |
| 1 British Thermal Unit (BTU) |
|
= .252 kcal |
| 1 kilo - calorie (kcal) |
|
= 3.97 BTU |
| 1 BTU/lb |
|
= 0.555 kcal/kg |
| 1 watt |
|
= 1.8 BTU/lb |
| |
|
= 1 kcal/kg/°C. |
| |
|
= 3.413 BTU/hr |
| HEAT, ENERGY, WORK |
| 1 ft lb |
= .001285 BTU |
= 0.13826 kg-meter |
| 1 joule |
= 1 watt - second |
= .000948 BTU |
| 1 BTU |
= 778.1 ft lb |
= .252 kcal |
| 1 KCAL |
= 3.968 BTU |
= 1000 cal |
| 1 hp-hr |
= .746 kw-hr |
= 2544.7 BTU |
| 1 kw-hr |
= 1.341 hp-hr |
= 3413 BTU |
| 1 boiler horsepower |
= 33479 BTU/hr |
= Evaporation of 34.5 water/hr at 212° F. |
|
|
