Sea Water Radiator
Sea Water Radiator: Superior Cooling Performance in Marine Conditions
In the maritime sector, the most critical factor determining the performance of engines and machinery is the ability to offer a stable cooling capacity even in aggressive environmental conditions. A sea water radiator is a specialized heat exchanger that dissipates the high thermal load generated in ship engine rooms by utilizing the high thermal capacity of sea water. As Fintherm, the marine-type radiators we design for cargo ships, tankers, passenger ships, and luxury yachts are manufactured with the most resistant alloys against the corrosive effects of sea water. The system operates on the principle of heat exchange between the cold sea water circulating inside the radiator tubes and the hot air outside the tubes. The hot air coming from the engines contacts the high-efficiency coils and transfers its heat to the sea water; the heated water then completes its cycle and is discharged back into the sea. This cycle prevents performance drops and mechanical failures by keeping the engine temperature within the optimum range.Corrosion Resistance and Material Engineering
Sea water is an extremely corrosive environment for standard metals due to its high salt content. In Fintherm marine radiator designs, only certified materials specific to this environment are used to ensure long life and reliability. Our finned or non-finned, straight or oval tube options come to life with the following materials:- Cupro-Nickel (Copper-Nickel) Tubes: CuNi alloys that provide the highest resistance against sea water.
- Special Alloy Fins: Aluminum or copper fins with increased corrosion resistance that maximize heat dissipation by increasing the surface area.
- Headers and Side Plates: Heavy-duty construction resistant to vibration and salt, which fixes the radiator to the body and regulates fluid inlet-outlet.
Operational Ease: Removable Cover Design
Microorganisms and sediments in sea water can cause blockages on the inner surfaces of the tubes over time. These blockages increase pressure losses and reduce radiator efficiency. Thanks to the removable cover design developed by Fintherm, internal tube cleaning and maintenance can be easily performed by removing the covers even while the ship is underway. This “maintenance-friendly” structure prevents unexpected downtime while ensuring the system always operates at peak efficiency.International Standards and Design Power
All our marine-type radiators are produced in full compliance with the strict safety rules of the maritime industry and international design standards. The main norms taken as a basis in our engineering calculations are as follows:- EN 13445-3: Unfired Pressure Vessels
- ASME Section I & II: Boiler and Pressure Vessel Code
- EN 12952-3: Water-Tube Boilers and Auxiliary Installations
Proje Sürecimiz
01.
Needs Analysis and Technical Evaluation
02.
Engineering Design and Calculations
03.
Production Planning and Material Selection
04.
Manufacturing and Assembly Process
05.
Testing, Inspection and Approval Processes
06.
Delivery, Support and After-Sales Services
Frequently Asked Questions
01.
What is a Sea Water Radiator and Why Is It Different From Standard Radiators?
A sea water radiator is a heat exchanger that uses the sea water from the environment as the heat-absorbing fluid for cooling ship engines and machinery. Unlike standard radiators, it is composed of special alloys such as cupro-nickel (bafon) and maintenance-friendly removable cover designs to withstand the severe corrosion and clogging caused by salt, sand, and microorganisms within the sea water.
02.
Why is "Bafon" (Cupro-Nickel) material mandatory in marine radiators?
Sea water has a corrosive power that can penetrate through carbon steel and standard stainless steels in a short period. Bafon (especially CuNi 90/10 or 70/30) creates a natural resistance to sea water and builds a protective layer on the surface of the metal. This alloy provides both high thermal conductivity and maximum protection against localized perforations called "pitting."
03.
What is the benefit of the removable cover design for ship operations?
In systems operating with seawater, the accumulation of shellfish, algae, or sediment inside the tubes is inevitable. The removable cover design allows for the mechanical brushing and cleaning of the tube interiors by simply opening the covers without removing the entire radiator from the line. This feature shortens the ship's port stay duration and enables maintenance to be performed even in the open sea.
04.
Do "Anodes" (Sacrificial Anodes) be used to prevent corrosion in sea water radiators?
Yes, sacrificial anodes (zinc or magnesium anodes) are generally used in sea water radiators to prevent galvanic corrosion. Instead of sea water corroding the main metal of the radiator, these parts oxidize by sacrificing themselves. Checking these anodes during periodic maintenance and renewing them as they are depleted can increase the radiator's lifespan by up to ten times.
05.
Which fin technologies should be preferred in marine-type radiators?
In marine environments, salt particles (salt mist) in the air can rapidly corrode aluminum fins. For this reason, in Fintherm designs, thick aluminum fins with increased corrosion resistance, epoxy-coated fins, or entirely copper fins for the heaviest-duty conditions are preferred. The fin spacing (pitch) is kept wide to prevent clogging in the oily and humid air of the engine room.
