VDL Klima - Markets - Boxcoolers

General

Application
Work boats such as suppliers, tugs, cable & pipe layers and ice breakers.
Cargo vessels such as tankers, dry cargo vessels and container ships.
Fishing vessels.
Dredgers Ferries.
Inland barges

Constructions wise advantages of the KLIMA Boxcooler
Special coating with higher performance V-shaped tubes to brake the force of the incoming water.
Reinforced tube/support plate connection Extra strip to avoid vibrations

Cost savings and advantages

For the yard:

No seawater strainers and pumps
No seawater resistant ductwork
No inlet filters
No seawater resistant bottom valves and overboard valves
No electrical equipment and alarms at seawater side
Less installation costs.

For the owner:

Less maintenance
In dirty waters as well as ice waters the cooling capacity is guaranteed
Less fuel consumption by auxiliaries
No seawater in the ships engine room
No replacement of seawater pumps and ductwork after every 4/5 years
Less breakdowns because of simpler engine room installation
No spare parts for cooling water pumps, strainers, bottom- and overboard valves
Less items for classification
Easy to clean

lw1 Selection

Classification

Standard	Special
ABS	CSS
BV	MROS
DNV	PRS
GL	RINA
LRS

lw1 Longitudinally:

Here the box is placed along the ship's hull. In this case the box does not come so close to the ships centre line and would appear to take up less space. Although the volume of the box remains the same.

Athwart ship:

In this arrangement the box is projected at right angles to the ships hull. In some cases, depending on hull shape, the box needs to be positioned closer towards the ships centre line in order to clear the bilge. An often used position is the corner against the engine room bulkhead.

Comparison coated and uncoated Boxcoolers

Advantages Al.ms coated Boxcoolers

Absolutely no galvanic corrosion
Therefore unrestricted lifetime; no renewing of the bundle after several years
Does not have to be mounted isolated to the hull
Only a few sacrifice anodes have to be placed to protect the sea chest against corrosion
Can be used in combination with ICCP
the so called ECC or CDU unit does not have to be installed to reduce the galvanic corrosion
If welding is done when box cooler is installed and the ship is laying in the water, bad grounding has no effect on the box cooler

Disadvantages Al.ms coated Boxcoolers

No natural anti fouling so marine growth is possible
If fouling is expected an anti fouling has to be installed (can be guaranteed for 2,5 or 5 years

If during installation the coating has been damaged accidentally it can be repaired (repair set available)

Advantages CuNi10 uncoated Boxcoolers

Natural anti fouling as Cu-ions are coming free from the tubes
No anti fouling system is required

Disadvantages CuNi10 uncoated Boxcooler

Wall thickness of the tubes will become less every year as u-ions from the tubes dissolve
Tube bundle has to be renewed after a certain period
A lot of extra sacrifice anodes have to be placed to protect the sea chest (ha a negative effect on marine growth)
Spacing between the bundle and steelwork of the sea chest has to be as large as possible (the smaller the distance the more galvanic corrosion)
The so called ECC or CDU unit has to be installed to reduce galvanic corrosion
Can not be used in combination with ICCP
If an oxide layer is formed the copper stops to dissolve and marine growth starts
If welding is done when box cooler is installed and the ship is laying in the water, bad grounding can damage the Boxcooler
Has to be mounted isolated from the hull

Opmerking:

The EEC unit (Electronic Current Control) or CDU unit (Control Drain Unit) are controlling the current between the CuNi10 tube bundle and the steelwork of the sea chest. The advantage is that the galvanic corrosion will be less but the working of the natural anti fouling will reduce. Still the tube bundle has to be renewed after a longer period and there will be marine growth.