• Fishery applications - Industrial Refrigeration Danfoss
  • Fisheries require fast, efficient cooling systems to ensure that the fish products remain fresh, healthy and appetizing all the way to the consumer. But, marine environments are aggressive to most materials – therefore stainless steel is the material of choice for all fishery production plants, whether at sea or on shore.

    At Danfoss we have the experience and knowledge to act as a competent and trustworthy partner for the global fishing industry – and we have all the refrigeration solutions to provide our customers with accurate temperature control and a consistent production flow.

    When hygiene really matters and corrosion is a serious risk due to the harshness of the environment in fisheries, stainless steel is your ideal choice for refrigeration systems. Danfoss brings the required competence from developing and producing stainless steel valves for industrial refrigeration for a number of years combined with wide, specialized application knowledge.

    All products come with a wide range of approvals.

    What's in it for You?
    • Precise temperature control
    • Stainless steel products for high hygiene and low corrosion risk
    • Reliable solutions, low operation and maintenance costs


  • From Sea to Cold Storage

    The diagram shows some of the critical production phases in which Danfoss solutions help fisheries maintain a consistently high quality through meticulous temperature control.


  • Fishery process - Industrial Refrigeration Danfoss
  • A - Pre-Cooling and Cooling

    Pre-cooling temperature: Below +4 °C

    On almost all ships the fish are coming into a refrigerated sea water tank (RSW) right after being caught. The temperature of the sea water is as low as possible, 0 °C to -1 °C.

    Cooling way: Low-temperature sea water (RSW tank) or flake ice can be used for pre-cooling and cooling

    B - Quick-Freezing

    Quick-freezing temperature: -30 °C to -50 °C

    Preliminarily processed fishery product is frozen rapidly to very low temperature quickly to guarantee subsequent storage and transportation.

    Cooling way: Quick-freezing can be achieved by plate freezer

    C - Onboard Refrigeration Storage

    Refrigeration storage temperature: Below -30 °C

    • Refrigeration storage temperature varies depending on the type of seafood, to guarantee the freshness, color and taste
    • Refrigeration storage temperature for fatty fish should be below -30 °C
    • Refrigeration storage temperature for tuna and so on should be below - 50 °C or - 60 °C

    Cooling way: Safe refrigerant shall be used

    • Refrigerants such as HCFC and HFC are commonly used in North America and China
    • In Europe the most commonly used refrigerant is CO2 but ammonia and brine are also used in this region


    D - Post-Processing

    Air can be isolated with plating water glaze or packaging to avoid oxidation and to protect the quality of the frozen aquatic food in the refrigeration process

    E - Refrigeration Storage in Cold-Storage

    Refrigeration storage temperature: Below -30 °C

    Refrigeration storage temperature varies depending on the character of the seafood to ensure freshness, color and taste.

    • Refrigeration storage temperature for fatty fish should be below -30 °C
    • Refrigeration storage temperature for tuna and so on should be below - 50 °C or - 60 °C

    Cooling way: Ammonia and CO2 can be used for direct refrigeration.

    Defrosting is necessary when the refrigeration temperature is maintained with air cooler

  • Want to Find Out More?

    Interested in learning more about Danfoss products? Send us an email and one of our Danfoss experts will get back to you as soon as possible.


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