1000 kg avocado puree ( 8 % fat, 1 % protein, 6 % carbohydrate, 85 % water) is cooled to -18 oC from 20oC. If the freezing point is -1 oC, find the total energy to be removed? If the max energy of the cooler is 30 kw /h find the time required.

Cp= 1.424 carb. + 1.549 prot. + 1.675 oil +0.837 ash + 4.186 water

Cp under the freezing point, considering food composition: Cp= 1.424 carb. + 1.549 prot. + 1.675 oik +0.837 ash + 2.093 water