Stena E-MAXair

The main focus of the Stena E-MAXair concept is on dramatically reduced bunker consumption and emissions and full redundancy with double engines, double steering gear and double navigation systems.

She will still do an equally good, if not better, job as existing intermediate tonnage and will have ice class 1A. She will, of course, be built in accordance with the Stena MAX concept regarding redundancy, safety and large cargo intake on a shallow draft.

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With the help of engines running on LNG, the newly developed AirMAX concept, an optimized hull design and slow-rotating propellers, we have reached our goal. Fuel consumption is considerable reduced and emissions lowered, thus making Stena E-MAXair probobaly the greenest tanker in the world.

LNG Clean efficiency for a sustainable environment

The Stena E-MAXair is designed for LNG, liquefied natural gas, however, the main engine as well as the auxiliary engines can also run on regular diesel fuel. Today, LNG is without a doubt the cleanest fuel for vessels.

With its engines running on LNG the Stena E-MAXair produces 35-40% less carbon dioxide than a conventional vessel of comparable size, 90% less nitrogen oxid, no sulphur oxide and 99% fewer particles – and all this without using catalytic converters!

Fully bunkered with LNG, the Stena E-MAXair can sail non-stop for 22 days. Unless trading in an area where LNG bunker is available, the vessel can use regular fuel oil. Running on LNG has secondary economic effects, as it reduces the need for maintenance of both the main and the auxiliary engines.

Stena E-MAXair - a new dimension in fuel

1. Optimized hull configuration (Patent No PCT/SE2008/051050) The hull is optimized for the water flow when cruising at 13 knots. In combination with two large, slow rotating propellers, this reduces fuel consumption.
2. The Stena E-MAXair floats on air The hull construction allows the Stena E-MAXair to float on a cushion of air. The air pocket under the vessel is extended forward with help of the newly developed bulbous bulb (Patent no. PCT/SE2008/051050). Air pressure is maintained by compressors and since friction between water and air is lower than between water and hull, resistance is reduced.
3. LNG efficiency LNG, liquefied natural gas, is by far the cleanest and most effective fuel available for vessels today. The overall economic picture is actually even brighter as burning LNG reduces the need for engine maintenance.
4. The Stena E-MAXair sails with air When winds are favorable, the Stena E-MAXair can reduce fuel consumption even further by using the specially designed "kite sail".
Why the Stena E-MAXair is ecomonically superior to a conventional tanker of comparable size Stena E-MAXair Metric tons of fuel /day 1. Optimal configuration of the hull saves 2,5 2. Air Mix saves 1 - 1.5 3. LNG energy density saves 2 4. Kite sail saves 0,5 –1 Sum of total savings: 7 metric tons fuel /day   Cruising at a speed of 13 knots the Stena E-MAXair consumes 15 mt of LNG fuel per day while a traditional tanker of the same size consumes 22 tons of fuel oil at normal service speed, an astonishing 32% reduction! Lower fuel consumption makes a great difference – it benefits the environment and improves transport economy.