An introduction to…Cryogenic freezing tunnels


The objective of all cryogenic tunnel freezers is to quickly freeze or cool products using a cryogenic liquid in an efficient manner.

In its basic form, a cryogenic tunnel freezer consists of an insulated enclosure housing a conveyor belt to carry the products, an injection system to inject the cryogenic liquid, circulation fans to improve heat transfer with the products, and an exhaust system to effectively evacuate the excess gases.

Cryogenic tunnel freezers are ideal to process large quantities of products in a small footprint, while increasing product yield due to less dehydration and retaining product textures.

Although these are significant advantages over mechanical freezing systems, the most important concern is still product freezing cost. Therefore it is critical to design cryogenic tunnel freezers to operate as efficiently as possible, while incorporating the customer’s layout and required production capacities.

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