Exploring the potential of Seawater Air Conditioning and wider ocean energies

Seawater Air Conditioning (SWAC) is a technological process that uses a renewable and local source of cold water to cool buildings in near proximity.

Exploring the potential of-Seawater

The SWAC technology is relatively simple to operate and exploits temperature difference between cold ocean water and external air temperature Cold seawater is pumped from the coast and transported by pipeline to a heat exchanger which transmits the cold of the seawater to another effluent (water or air). This effluent is then used to cool buildings, industrial machines, etc.

The SWAC system holds considerable potential in coastal areas and tropical climates with high cooling and heating requirements. Today, air conditioning represents a significant part of the energy consumption, representing around 50% of the electricity bill of supermarkets and data centers and up to 60% of the bill for agro-industries (food processing, agro-resources, etc.)

SWAC solutions

SWAC innovations

DORIS combines its project-specific experience of SWAC with its broader offshore engineering knowledge to develop innovative solutions. These include cost-effective solutions such as self-burying pipes or the use of flexible pipe which will reduce the overall investment cost of the SWAC system by around 15%.

DORIS has also been a member of the EuroSWAC project since 2020. This project aims to design and validate an innovative, cost-effective and environmentally-friendly solution for cold production. The project uses seawater from the Channel, a widely available renewable energy source, as a refrigerant, exploiting the temperature difference between the cold ocean water and the outside air temperature.

Our Activities

Project management
Technical assistance
Asset management



DORIS, ROSEN and SPIECAPAG announce the Pipeline Transition Alliance providing full services capability to re-purpose Natural Gas Infrastructure to Hydrogen Service

Members of the Pipeline Transition Alliance after signing the strategic MOU (From left to right) Hernando...
Read More

DORIS acquires WINDGLAZ, a specialist in offshore wind and solar load modelling

DORIS, a leader in engineering, advisory and project management for energy, announces its acquisition...
Read More
CCS Hub Alliance

DORIS, Axens, AWT International, SeaQuester and Surbana Jurong announce the CCS Hub Alliance decarbonisation solution for hard-to-abate CO2 emitters

DORIS, Axens, AWT International, Sea-Quester Offshore and Surbana Jurong Infrastructure announce the...
Read More