Ton of refrigeration
| ton of refrigeration | |
|---|---|
| Unit of | Power |
| Symbol | TR |
| Conversions | |
| 1 TR in ... | ... is equal to ... |
| SI units | 3.51685 kW |
| Non-SI metric | 3,025.97 kcal/h |
| US Customary and Imperial | 12,000.00 BtuIT/h 2,593.90 ft⋅lbf/s |
A ton of refrigeration (TR or TOR), also called a refrigeration ton (RT), is a unit of power used in some countries (especially in North America) to describe the heat-extraction rate of refrigeration and air conditioning equipment. It was originally defined as the rate of heat transfer that results in the freezing or melting of 1 short ton (2,000 lb; 907 kg) of pure ice at 0 °C (32 °F) in 24 hours.
The modern definition is exactly 12,000 BtuIT/h (3.516853 kW). Air-conditioning and refrigeration equipment capacity in the U.S. is often specified in "tons" (of refrigeration). Many manufacturers also specify capacity in Btu/h, especially when specifying the performance of smaller equipment.