Air-Cooled Cooler
Subsea cooler

Subsea Cooler

A Subsea Cooler is an energy-efficient alternative for Air-Cooled Coolers in offshore applications because they use seawater as a coolant. The natural convection of seawater is used as a driving force; no mechanical power is required to drive the air around the finned tubes, as is the case with typical Air-Cooled Coolers.

This eliminates power costs and contributes to a more energy-efficient operation of the platform.

In addition - since the coolers are subsea - no space is required on the platform, resulting in smaller and economically more attractive platforms.

Request for Quotation

Cooling your process fluids offshore

On offshore platforms both seawater and ambient air are almost unlimited sources for absorbing the heat surplus generated by the processes on the platform.


Air-Cooled Coolers or Condensers are required to dispatch waste heat to the ambient air. Although this seems a sound way for cooling, the equipment requires quite a bit of plot space, which is expensive on platforms. In addition, the cooling fans require energy, maintenance and spare parts.

Water-cooled equipment

Cooling with seawater requires (much) less lot space than cooling with air. Seawater can be pumped to the cooler but has the drawback that the pump requires a lot of maintenance. Seawater is corrosive and requires special materials. It also causes biological pollution.

Maintenance-free Subsea Cooler

Our Subsea Coolers do not require plot space and do not use pumps. The seawater around the cooler is heated, creating a natural draft in the sea as an engine for cooling. In addition, we have extensive experience with a corrosion prevention system.

Air-Cooled Coolers
Transpot of a subsea cooler

We come up with a Subsea Cooler that meets your specific needs

Surplus heat on offshore platforms can be transferred to ambient air or seawater. If the plot area is limited on a platform, the transfer to seawater remains a solution.

If the platform is unmanned - and regular maintenance is not an option - Subsea Coolers are the preferred solution. They are virtually maintenance-free, use seawater for cooling and do not take up space on the platform.

No platform space required

By installing a Subsea cooler instead of a conventional Air-Cooled Cooler or Shell & Tube Heat Exchanger, you will save 100% of the original required platform space. The Subsea Cooler is installed subsea and therefore does not require any platform space. Subsea Coolers also have the advantage of not requiring driving power and hardly any maintenance.

Dealing with pollution

Undersea cooling is unfortunately not protected against biological pollution. The rate of biological pollution is highly dependent on the location of the platform - around the equator, or near the poles, or somewhere in between - the depth of the sea and the level of the cooler. This means that a specific solution must be devised for each project, which requires close cooperation between our customer experts and our specialists. Pre-engineering is necessary before a sound and solid design can be presented. However, keep in mind that any maintenance interval for a Subsea Cooler will be significantly longer than the maintenance interval for a seawater pump.

Performance and reliability improvement

There are several strong advantages to choosing Subsea Cooling as the best solution for offshore cooling.  Whatever your question may be about Subsea Cooling, our answer will always be an advice that prepares you for the future. This advice may include new systems, other installations, maintenance to keep an installation in good working condition or by fixing what is broken. We optimize existing processes and develop innovative products. This allows us to offer the most efficient and advantageous solutions, guaranteeing sustainability and energy efficiency.

Talk to our specialists

1.13 - subsea cooler foto 01

The advantages of our tailor-made Subsea Coolers

We extensively calculated and simulated the effect of tidal movement underwater and natural current of heated water to design customized Subsea Coolers. 

This results in several benefits for your overall project:

  • A Subsea Cooler that makes no use of pumps.
  • A space saving solution that needs no large oil or gas platform.
  • The prevention of the growth of algae, corrosion and pollution of the underwater heat exchanger, by designing a construction with a solid and open frame.
  • Overall saving of costs of at least 25%.

Solving customer problems with innovative, proven technical solutions.

Offering the best products and services worldwide since 1940

More interesting case studies
Subsea cooler

Technical knowledge and experience for Subsea Cooler

How we came up with a spot saving and maintenance free solution. 

Read this case study
Reduced plot space Air Coolers

Safe and reliable cooling in the Gulf of Mexico

We helped Petroleos Mexicanos with the right cooling solution for the Litoral-A project. 

Read this case study
Air-cooled heat exchangers

Innovative solutions for several companies

Get to know our product range of Air-Cooled Coolers and the services we offer.

To all Air-Cooled Coolers
Working on a subsea cooler

Let’s talk about your challenge

Do you have a specific question about Subsea Coolers? Or do you want some other information? Please fill in the form. 

Our specialist will soon contact you