A ton of refrigeration is approximately equal to 12,000 BTU/h or 3.5 kW. It is defined as the power required to melt or freeze 2000 pounds, also known as one short ton, of ice per day. Ton of refrigerationĭefinition: A ton of refrigeration (TR) is a unit of power. Multiples of the watt hour, often the kilowatt hour, are more frequently used than Btu/h, even in the United States. It has a number of different definitions all of which equate to approximately 1,055 joules.Ĭurrent use: The British thermal unit per hour is not a widely used unit. The BTU is specifically defined as the amount of heat required to increase the temperature of one pound of water by one ☏. History/origin: The British thermal unit per hour is based on the British thermal unit (symbol: Btu or BTU), a traditional United States customary unit of heat, where heat is a type of energy transfer in which energy moves from a hotter to a colder substance. One watt, the International System of Units derived unit of power, is equal to approximately 3.41214 Btu/h. This unit is often abbreviated as simply "Btu," which is the same abbreviation used for British thermal units, a measurement of heat. Definition: The British thermal unit per hour (symbol: Btu/h) is a United States customary system unit of power.
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