What is unit of refrigeration?

The unit of refrigeration is a measure of the cooling capacity of a refrigeration system. It is defined as the amount of heat that is removed from a substance to lower its temperature by one degree Fahrenheit or one degree Celsius. The most commonly used unit of refrigeration is the Ton of Refrigeration (TR), which is the amount of heat that must be removed from one short ton (2000 pounds) of water at 32 degrees Fahrenheit to turn it into ice at the same temperature in 24 hours. One TR is equal to 12,000 British Thermal Units (BTUs) per hour or 3.516 kilowatts of cooling capacity. Other units of refrigeration include the kilowatt (kW), the horsepower (hp), and the calorie. The choice of unit depends on the application and the specific requirements of the cooling system.