Energy efficient Air Cavity Ships

This research project aims at investigating the hydrodynamic effects that influence the design of an air Cavity Ship (ACS) for a displacement ship and to give guidance, through knowledge and tool development, for future design of an ACS. The energy saving potential for a VLCC class ship with air cavity is estimated to be close to 20%, i.e. 30,000 MWh/year and ship. An ACS is a ship where a large portion of the flat hull bottom is replaced with an air cavity. The largest contribution to the ship resistance is the friction between the hull and the water, and this way to reduce the wetted surface area of the hull is thus the reason for the large energy saving. The project includes both theoretical work, experiments and a process to transfer the knowledge to industrial parties.


Rickard Bensow (contact)

Professor at Shipping and Marine Technology, Marine Structures and Hydrodynamics

Abolfazl Shiri

Forskare at Shipping and Marine Technology, Hydrodynamics


SSPA Sweden AB

Göteborg, Sweden

Stena Shipping AB

Gothenburg, Sweden


Swedish Energy Agency

Funding years 2010–2013

Stena Shipping AB

Funding years 2010–2013

Swedish Energy Agency

Funding years 2013–2014

Related Areas of Advance and Infrastructure


Area of Advance

Sustainable Development

Chalmers Driving Force

More information

Project Web Page at Chalmers

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