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Revisit to the Basics

Chiller Refrigeration Tons
The process of cooling is called refrigeration. Refrigeration or cooling capacity can be measured in tons.

A water-chiller refrigeration ton is defined as:

1 Refrigeration Ton (RT) = 1 TONScond = 12000 Btu/h = 200 Btu/min = 3025.9 k Calories/h = 12661 kJ/h = 3.517 kW
1 kW = 0.2843 Refrigeration Ton (RT)
A ton is the amount of heat removed by an air conditioning system that would melt 1 ton (2000 lbs.) of ice in 24 hours. The heat required to melt 1 lb of ice at 32 oF to water is 144 Btu.
1 Ton Refrigeration = (2000 lb) (144 Btu/lb) / (24 hr)= 12000 Btu/hr
Converting between Btu/h and Tons of Refrigeration
Btu/hRefrigeration TonkW60001/21.761200013.52180001 1/25.282400027.03300002 1/28.7936000310.6420003 1/212.348000414.1540004 1/215.860000517.6

Disclaimer: As obtained from the Internet