Illustration of the LNG-powered Aframax tanker. Photo: SCF Group
Russia’s largest shipping company SCF Group has selected Swiss-headquartered Winterthur Gas & Diesel (WinGD) to provide the duel-fuel engines for the first ever gas-powered Aframax tankers.
Under a contract signed in March, WinGD will supply the low-speed dual-fuel engines that will power the oil tankers. SCF Group has chosen WinGD’s seven-cylinder, 62 cm bore type 7X62DF engines, which are rated 13,800 kW at 86 rpm and designed to operate on a choice of LNG, HFO, distillate or hybrid liquid fuels.
The tankers, four in total, will be built by Hyundai Heavy Industries (HHI) of South Korea at its shipyard in Samho, while the 7X62DF engines will be built by HHI’s Engine & Machinery Division (HHI-EMD) in Ulsan, South Korea.
Delivery is scheduled for the third quarter of 2018.
The 7X62DF engines comply with IMO Tier III limits for oxides of nitrogen (NOx) in their gas fuel mode, and with IMO Tier II when burning liquid fuel. To enable IMO Tier III compliance on liquid fuel operating mode, the contract also specifies the supply of low-pressure selective catalytic reduction (SCR) after treatment systems for the 7X62DF engine.
The LNG-fuelled Aframax crude oil tankers have a capacity of 114,000 dwt. The vessels are designed to ice-class 1A and are scheduled to operate primarily in the Baltic and North Seas. With the ability of the 7X62DF engines to meet IMO Tier III limitations on NOX and SOX in Emission Control Areas (ECAs) when operating on gas without after treatment, and when burning low sulphur liquid fuel with low-pressure SCR, the tankers are designed for worldwide trade, including ECAs.
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