Constant and efficient cooling - like a plate cooler
Unique maintainability - like no other cooler
Box cooling challenges
Variable cooling capacity
Perforated hull to create a natural flow of cold seawater
Gives limited cooling capacity at low speeds, e.g. dynamic positioning (DP)
Maintenance
Must accept sharply reduced cooling performance due to fouling
Or incur the expenses of extra docking
Closed tank system- forced flow
High efficiency
Closed tank system in which frequency-controlled pumps distribute seawater regardless of the vessels speed
Twice or three times the heat transfer (K-value) that box coolers can provide
Constant cooling capacity
Independent of ship service speed
Steady cooling over time and in all operating situations
Highly efficient even at low speeds and high seawater temperatures
Heat transfer (K-value) 3 times as high as box coolers
No need for dry docking
Easy inspection and maintenance
Cooling units can be lifted up for maintenance even in rough weather without damage to the pipe structure
Robust framing - one-point lifting hook
To prevent accumulation of sediment, the seawater outlet is positioned at the bottom of the tank
No loss of buoyancy
Less than a tenth of box coolers volume - same cooling effect
On large offshore vessels the volume of box coolers is at least ten times higher than for rack coolers with the same cooling effect
In addition to increased piping and infrastructure, this affects the vessel's buoyancy
Flexible and scalable solution
Scalable to any need - even after installation
Highly flexible and scalable solution for every need
Can easily be extended
Standard units with the potential for separate high-temperature and low-temperature circuits with a cooling surface, typically of 60 square meters (60 m2) per unit
Close to main engines
Less piping and infrastructure compared to box coolers
Can be placed in the ballast tanks below the deck level (tank top) close to the main engines
Reduces the need for long pipe runs
Installed below deck level
Freeing valuable space in the engine room compared with plate coolers
Like box coolers, rack coolers free up valuable space in the engine room
Easy for the shipyard to install
Simplified piping accounts for much of the space savings
Minimal fouling
Naturally protected against fouling
Consist of tubes made from a copper-nickel alloy
Form a natural protective shield against bio-fouling
Release very small amounts of toxic copper ions
No galvanic corrosion
Completely isolated from the hull structure
Eliminates the need to install zinc anodes in the tanks
