70/30 Copper-Nickel | WEKA Marine

Bundled to perfection

70/30 Copper-Nickel

Another copper-nickel cooling solution is the uncoated 70/30 copper-nickel box cooler. The 30% nickel alloy is stronger and can withstand higher seawater velocities, compared to the 90-10 alloy and does also not require a protective coating or ICAF (impressed Current Anti-Fouling) system due to its inherent corrosion resistance to seawater and natural anti-fouling capabilities.

To protect the uncoated box coolers against potential stray current corrosion, a WEKA Guard™ and WEKA Protector™ Type T system are applied. This exclusive design is successfully utilized in specific cooling projects worldwide.

WEKA Protector™ and WEKA Guard™
Exclusive to WEKA box coolers are the WEKA Protector™ and WEKA Guard™. This equipment helps to minimize potential damage to the units and hull from stray electrical currents and galvanic corrosion. The WEKA Protector™ also allows the copper-nickel to maintain its anti-fouling capabilities, protecting the tubes from marine growth.

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Engineered to cool

Technology

The versatility of the WEKA box cooler is equally matched by its cooling prowess. Its straightforward design can be adapted into various configurations and shapes to precisely fit available space and cooling demands.

A typical box cooler features a U-shaped tube bundle, firmly secured with a tube sheet and a waterbox to guide the flow of water. This bundle is fastened with a gasket to a mounting frame, anchoring the cooler to the vessel’s hull. This construction technique enables the removal of the waterbox while keeping the bundle fixed to the hull, preventing seawater from entering the vessel when the cooler is in use.

To cater to a broad spectrum of cooling requirements and diverse structural limitations, WEKA box coolers are available in multiple configurations, encompassing both round and rectangular designs.

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Strong and solid cooling solution

Applications

WEKA Marine’s box coolers stand as the optimal choice for small and medium-sized vessels, encompassing a broad spectrum of vessels, including tugboats, barges, fishing boats, carriers, dredgers, supply vessels, ferries, icebreakers, cargo freighters, tankers, and reefers. Box coolers provide versatile temperature control solutions, serving various functions from cooling main engines, auxiliary engines, and bow thrusters to regulating air conditioning and hydraulic systems.

Our range of box coolers offers flexibility in terms of size, shape, and configuration to suit specific cooling capacity requirements. A prominent application for our box coolers involves efficiently dissipating waste heat generated by diesel engines and other heat sources like charge air coolers, lube oil coolers, and gear oil coolers.

WEKA Marine prides itself on the innovative technology that underpins our high-performance box coolers. Years of dedicated innovation and engineering excellence have led to the development of these top-tier solutions. This commitment drives our continuous efforts to enhance and optimize the mechanical design and thermal performance of our products, ensuring they meet the exacting demands of our valued customers, the evolving market, and classification societies across the globe.

Ensuring they meet the exacting demands

Marine Applications

Box coolers are suitable for the following vessel types

Tugboats
Fishing boats
Barges
Construction vessels
Carrier vessels
Offshore vessels
Small & medium tankers
Cargo Ships
Carriers
Dredgers
Ferries
Ice Breakers

General box cooler key benefits

Less susceptible to corrosion and fouling
Can operate in icy conditions, silt or polluted waters
Low maintenance
Space-saving in the machine room
Low operational costs

Design Specifications

Design Pressure: 3.33 bar g
Test Pressure: 5.00 bar g
Design Temperature: 94.9 °C

Selection of Materials

Bonnet: Carbon Steel – Color coated
Tubesheet: Naval Brass
Support plate: Teflon
Tubes: Cu/Ni 70/30
Coating: N.a.
Bolts: Carbon Steel Galvanised
Gaskets: Rubber compound
Isolation Bushings: Yes
Additional equipment required: WEKA Guard & Protector

Amazing results after a 6 week feasibility study

Copper-Nickel 70/30 Advantages

Natural Anti-Fouling

This image illustrates a comparison between traditional aluminum brass tubes with hard baked coating (left side) and uncoated 90/10 copper-nickel tubes (right side). It’s the result of a six weeks feasibility test. The high copper content of the tubing provides natural anti-fouling capabilities, offering protection against marine growth. Copper alloys possess an inherent natural resistance to biofouling. Clearly, the 90/10 Cu-Ni alloy is resisting fouling from algae mussels and other marine growth. For clarification, the biofouling resistance of copper alloys is due to the copper in the protective oxide film; it is not from the leaching of copper ions.

Amazing results after a 6 week feasibility study

Copper-Nickel 70/30 Advantages

Natural Anti-Fouling