RSW catch cooling for fishing vessels

RSW systems for purse seiners, trawlers and coastal vessels.

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CO2PRO RSW RSW tank Seawater

Typical duties

  1. Cool the catch quickly

    Tank seawater brought down from sea temperatures of up to 35 °C to about −1 °C, and held there through the trip.

  2. Capacity

    The system is sized for tank volume, catch rate and seawater temperature.

  3. Fit the available machinery space

    New builds and retrofit in existing hulls, within the space and the power available on board.

  4. Freezing on board

    Chiller/Heat supplies brine down to −35 °C for plate freezers and freezing tunnels.

Technical details

RSW sizes NG588 to NG9826
NG588 is for smaller vessels, NG9817 for purse seiners and trawlers with several tanks, and NG9826 for the biggest hulls.
Electrical supply
Maximum current at 400 V is 56 A on the NG588 and 250 A on the NG9826.
Titanium heat exchangers, stainless frame
Heat exchangers for tank seawater have a PE shell and titanium core, with pipework and frame in 304 stainless steel.

How it works

Simplified system diagram

80.8 m³/hPressure headerSuction headerTank 1Perforated pipe, topPerforated pipe, bottomTank 2Perforated pipe, topPerforated pipe, bottomTank 3Perforated pipe, topPerforated pipe, bottomValveValveValveValveValveValveValveValveValveValveValveValveValveValveValveSeawater outletGas cooler outletFlow meterCO2PRO RSW NGRSW pumpGas coolerpumpSeawater inlet
The pump draws from the suction header at the bottom and discharges to the pressure header at the top. The twelve tank valves control the direction of flow through each tank: in through the top perforated pipe and out at the bottom, or in the reverse direction. Open valves are green. The gas cooler has a separate seawater circuit. Simplified system diagram. Not an actual installation.

Customer case: Vestvær

A CO2PRO RSW system with a customised HMI for the refrigeration system, valve control, pumps and flow measurement.

The vessel at sea, the machinery room with the RSW plant, and the customised HMI screen.
The vessel, the machinery room and the HMI screen. The HMI is shown in simulation mode, without a PLC.

Systems

Sea water cooling

CO2PRO RSW

From the compact NG588 for smaller coastal vessels up to the larger hulls.

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