COOLİNG
nWhile heating is the addition of heat energy to foods, cooling is the subtraction of heat energy.
nPrimarily we refrigerate and freeze foods to prolong their keeping quality.
nBut there are some foods that owe their entire character to the frozen state. A prime example is ice cream.
nA great deal of milk and cream are cooled by passing them in thin layers through heat exchangers.
nWithin the leaves are pipes through which cold water or refrigerant is pumped.





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