3. Cryogenic processes

Crygenic processes can be used in cooling processes. Three different cooling methods are commonly used:

  1. contact cooling, whereby block-shaped foods are frosted on metal plates, which are cooled by a cooling liquid
  2. freezing by cold air, which is blown over and around the food
  3. cyrogenic methods, where gases like Carbondioxide (-78°C) or Nitrogengas (-196°C) are blown into a tunnel, through which the food passes. Both gases are non-poisonous, odor- and tasteless, and can therefore be used to freeze unpacked foods like fruits, baked goods, meat or fish.

In large cooling facilities ammonia gas is often used to replace the greenhouse gas CFC.

Cryogenic Gas

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