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Cryogenic tunnels use liquefied carbon dioxide (LCO2) or liquefied nitrogen (LIN) for continuous cooling and freezing. A conveyor belt moves the product along the tunnel. Controlled injection of a cryogenic liquefied gas that immediately evaporates lowers the temperature in the tunnel. The latent heat of evaporation is the main source of cooling energy. Turbulence fans spread the gas in the tunnel in a controlled way and efficiently transfer the cold to the product’s surface. Exhaust fans extract the residual gases.

Linear Freezer Tunnel – Top lifting for continuous cooling or food freezing

  • Cryogenic tunnels are used for many applications. You can process any flow of product that must be continuously cooled, frozen, or crustfrozen. The main applications are in the food industry.

  • Although Dohmeyer’s cryogenic tunnels exist in standard dimensions, it is possible to design tailor made tunnels that suit the specific needs of any individual application.
    Dohmeyer’s tunnels have 140 mm thick, high performance, thermal insulation.

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