A shuttle tanker concept developed by Teekay, in close co-operation with Wärtsilä, will offer a new level of ecological and economic solutions by using Wärtsilä’s smart technology in innovative ways.
The concept has been endorsed with orders for four of these next-generation vessels for Teekay. The ships will be built at the Samsung Heavy Industries yard in South Korea and will feature a broad assortment of Wärtsilä’s latest technology innovations, all of which are central to the concept’s overall performance gains. These orders were booked in December 2017 and January 2018.
The concept is expected to reduce annual emissions of CO2 equivalents by more than 40%, compared to conventional shuttle tankers. In addition to operating on LNG as the primary fuel, the dual-fuel engines will also be able to run on a mixture of LNG and recovered volatile organic compounds (VOCs) – the gas evaporating from the oil cargo tanks during loading.
By utilising the recovered VOCs as fuel rather than venting them to the atmosphere, the harmful emissions will be eliminated and the ships’ bunker needs will be significantly reduced. The concept is also intended to ensure that NOx emissions from the engines’ exhaust will be reduced by more than 8%, SOx emissions will be almost eliminated, while particulate emissions will be reduced by more than 95%. These environmental benefits are matched by equally important economic advantages, with a significant reduction in fuel consumption compared to conventional solutions.
Among the many innovative features is the Wärtsilä Hybrid system, on which the power distribution will be based. The Hybrid system uses batteries for fuel savings, peak load shaving, and added overall system redundancy. This directly impacts the main machinery, resulting in fewer running hours with correspondingly lower maintenance time and costs.