Ton of Refrigeration (TR)

A tonne of Refrigeration is defined as the amount of refrigerating effects produced by the uniform melting of one tonne (1000 kg) of ice from and at O⁰C in 24 hours.

1TR = 1000 x 335 KJ in 24 hours                            ::: Latent heat of ice = 335 KJ/Kg
        = (1000 x 335)/ (24 x 60)
        = 232.6 KJ/min

In Practice 1 ton of refrigeration is taken as equivalent to 210 KJ/min or 3.5 KW.

See Also :: Coefficient of Performance (COP)::