– Tell us briefly about the E-Shuttle project 

– E-Shuttle is our dream shuttle tanker. We have made great leaps from the previous generation of ships we built. Now we have liquefied natural gas (LNG) as a propulsion fuel, four-stroke engines in a gas- or diesel-electric configuration to better fit our operating profile, and we have installed battery packs for efficient and optimised power output, says Ingvild Sæther, CEO of Altera Infrastructure.

– We also have plants that liquefy VOC emissions from loading operations instead of releasing them into the air. VOC stands for volatile organic compounds, such as oil or solvent vapours. The condensed VOC is mixed with LNG before injection into the engine. In this way, approximately 30 per cent of the ship’s fuel consumption is recovered from what would otherwise have been discharge. All in all, this means that with four of these ships, we reduce CO2 equivalent emissions by more than 60,000 passenger cars compared to construction using conventional technology. So, the impact from our E-Shuttles is more than the effect of all the Teslas in Norway, says Sæther. 

We used over two years to arrive at the most energy-efficient design possible, with a fuel source that is a step further towards zero emissions.

Ingvild Sæther, CEO, Altera Infrastructure

– Why are you doing this? 

– For our operations, we did not believe that ships with heavy fuel oil and scrubbers would be economical or sustainable throughout the 20-year lifetime of the ship. That is why we used over two years to arrive at the most energy-efficient design possible, with a fuel source that is a step further towards zero emissions. We believe that we have arrived at a future proof ship, which is competitive on the three Es – Efficiency, Economy, and Environment – hence the E-Shuttle.

– What have been the biggest challenges so far? 

– The cost level and getting customers involved. But here ENOVA has been an important contributor, and the general focus on sustainability has also helped us along, Ingvild Sæther says.

The Altera E-shuttle