CONVERTING KW/TON TO COP or EER

One ton refrigeration ton(TR)was defined as the heat absorved by the one ton of ice (2000 pounds) causing it to melt completely by the end of one day ( 24 hours).

The COP is the ratio of the heat removed from the cold reservoir to input work.

The EER is the efficiency rating for the equipment at a particular pair of external and internal temperatures.

If a chiller's efficiency is rated at 1 KW/TR, the COP=3.5 and the EER=12

KW/TR = 12 / EER
KW/TR = 12 /(COP x 3.412)
EER = 12 / (kW/ton)
EER = COP x 3.412
COP = EER / 3.412
COP = 12 / (kW/ton x 3.412)