RSW systems

Compact and complete systems for effective refrigeration of seawater and fish

The new generation of RSW systems is space-saving and based on highly efficient modern technology.

Over the past 40 years, we have delivered FrioNordica and SeaCO₂ol RSW systems with refrigerating capacities of 50–2 500kW to the international fishing fleet, the coastal shipping fleet, well boats, land-based aquaculture and the fish processing industry.

Natural refrigerants
Our FrioNordica and SeaCO₂ol RSW systems collectively provide a complete range of forward-looking solutions based on the natural refrigerants NH₃ (ammonia) and CO₂. They can also be delivered with other refrigerants. Ammonia is an ideal refrigerant for large industrial plants, and is used extensively in FrioNordica RSW systems. With our smaller facilities, SeaCO₂ol RSW can be offered with CO₂ as the refrigerant.

FRIONORDICA RSW

FrioNordica’s RSW plants use ammonia as their refrigerant and are delivered in standard sizes from 350 to 2 500kW. The system has a very high performance in relation of power consumption, saves space and requires little refrigerant charge.

Features and benefits

Ammonia is the most environment-friendly refrigerant available, with excellent technical properties for large industrial RSW plants. Power consumption for an ammonia RSW is the lowest of all available refrigerants.
J&E Hall rotary compressor of single screw design. Balanced compression cancels out radial forces on the main bearings. Overhaul intervals of 100 000 hours give very low maintenance costs.
Continuously variable capacity control, 10–100%.
Variable frequency drive for compressor and pumps.
Seawater-cooled oil cooler for increased efficiency.
Titanium tubes and tube sheets in all heat exchangers. Tube joints are expanded and welded. Water heads are plastic.
Highly effective spray chiller with very low ammonia charge and low freeze-up risk.
10-year corrosion guarantee for parts in contact with seawater.
FrioLogica controller offering automatic operation and monitoring of parameters. Supported and updated over the internet.
Heat exchangers and units are produced at our own factory in Norway.

SEACO₂OL RSW

SeaCO₂ol RSW plants, which use CO₂ as the refrigerant, are built as complete and compact units delivered on a base frame. Efficient and reliable, they feature frequency regulated compressors, good part-load properties and freezeproof RSW coolers.

The RSW plant requires little refrigerant charge, takes little space and does not require its own room or ventilation.

A SeaCO₂ol RSW plant is delivered with seawater cooling or air cooling with outdoor gas cooler, complete with control system, compressors, valves, filters, automation and full internal cabling. Simple and user-friendly operation via a touchscreen display, with opportunities for remote control over the internet. Delivered for 3x400V, 50Hz as standard, but can also be tailored for other power supplies. Low maintenance costs.