The problem

Air lubrication is one of the most in-demand technologies in the maritime sector. Air lubrication works through releasing microbubbles under the hull of a ship, creating a very thin layer of aerated water that reduces friction with sea water. Crucially, this reduction of drag means vessels require less energy to propel themselves—a big win not just in terms of cost-savings and efficiency, but in terms of environmental outcomes. 

Existing methods of air lubrication, however, have their shortcomings. Most systems use compressors to generate a continuous flow of air which is then passed beneath

the ship’s bottom plate surface through embedded piping and air cavities in the hull to create the layer of air bubbles.

These compressors not only require significant installation space, they also demand additional power (often an auxiliary engine) and can increase vibration and noise. They can also often increase drag on ships when they are not in operation. These systems also depend largely on certain conditions, with limited efficacy in stormy seas.

How effective these systems actually are is also up for debate. Many systems claim 5-10% in fuel savings, but many systems are closer to 0-7%, and often claim single point performance at a set speed/draft combination.

The solution

Armada Technologies is the company behind a new patented Passive Air Lubrication System (PALS), a low power, sustainable solution that is aiming to transform maritime efficiency.

PALS uses the ship’s forward motion to create a precise air-water mixture for lubrication, relying not on high-energy air compressors, instead using small capacity water pumps only in sub-optimal conditions. Through a combination of its performance control system and machine learning, PALS ensures better bubble delivery and overall performance. 

Bubble distribution is optimised for each ship and for a variety of operating conditions (speed, depth, or weather), guaranteeing continuous smooth sailing. Moreover, PALS is engineered to excel under slow steaming and energy regulated conditions in order to maintain peak performance. 

Why we’re excited to invest

Olivia Brooks, investor at Blue Action Accelerator, says: "Across the maritime industry, we've seen many approaches around fuel saving technologies. Air lubrication technology stood out not just for its environmental benefits but also for cost-savings and efficiency. What we really admired about Alex and the Armada team was their novel passive approach to air lubrication technology, resulting in reduced power usage. The team has shown incredible industry knowledge, alongside a strong vision for the company and the need for this tech in the maritime industry."