Everllence unveils ESAL technology to improve vessel efficiency by up to 6%

Everllence has introduced Engine Supported Air Lubrication (ESAL), a new technology designed to improve vessel propulsion efficiency by up to 6%.

The system integrates hull air lubrication with the vessel’s main engine. According to Everllence, this can reduce fuel consumption, emissions and related compliance costs. The company has also released a white paper outlining the technology and its potential role in shipping’s energy transition.

Air lubrication reduces resistance between a vessel’s hull and the water by introducing air beneath the hull. Everllence’s ESAL technology integrates this process with air supplied by the main engine, an approach the company said can deliver net vessel efficiency gains of up to 6%.

Everllence has already conducted multiple onboard trials across several vessels. Per Cato, Senior Vice President and Head of Engineering Two-Stroke at Everllence, said the company is confident in both the technology and the efficiency improvements delivered by ESAL, having successfully conducted these trials across several vessels.

Everllence believes improving vessel efficiency can provide immediate benefits while the shipping industry’s transition to alternative fuels continues. Lower fuel consumption can reduce absolute emissions and limit exposure to changing fuel prices and regulatory costs. Bjarne Foldager, Head of Two-Stroke Business at Everllence, said the maritime energy transition must begin with reducing energy demand, adding that efficiency improvements can remain valuable regardless of how future fuel and regulatory frameworks develop.

Everllence positions ESAL as a technology that can complement the industry’s transition to lower-carbon and zero-carbon fuels. By reducing a vessel’s overall energy demand, the system can also reduce the amount of fuel required throughout its operating life. The company said this could help shipowners lower operating and compliance costs while preparing their fleets for future emissions requirements.