One ton of refrigeration or cooling capacity is The amount of cooling or heat transfer required to produce 1 TON of ice (2000 lbs) from and at 32oF in a day.
In this video, the values of 1 TR or 1 TOR of refrigeration is calculated.
There arre following units:

1 TR = 3.5 kW
1 TR = 12000 btu/hr
1 TR = 200 btu/min
1 TR = 211 kJ/min
1 TR = 3024 kcal/hr
The video also explains why the term tons of refrigeration is introduced at the first place and how it was defined.

Time Lapses : Chapters
00:00 - Intro
00:42 - background of ton of refrigeration
01:40 - Definition of 1 TR
03:44 - unit conversion of 1 TR
04:46 - 1 TR calculation
05:30 - more units of conversion of 1TR

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