Enginemaker Rolls-Royce has signed a US$6.5 million contract with Turkey’s Tersan Shipyard to supply an LNG-propulsion package for a fish-feed carrier on order to Norway’s NSK Shipping.
The vessel will deliver fish food for the BioMar Group. It will be slightly larger than its NSK sistership Høydal, which became the world’s first LNG-powered cargo vessel when Tersan delivered it in 2012. Both ships are designed by NSK Ship Design.
The 81.5m-long vessel will carry up to 2,700 tonnes of fish food to fish farms along the Norwegian coast.
The LNG propulsion system comprises one eight cylinder Bergen C26:33 natural gas engine rated at 2160kW, a Promas combined rudder and propeller system, one tunnel thruster in the bow and one aft, and a Rolls-Royce automation and DP system.
The vessel will be equipped with Rolls-Royce’s hybrid shaft generator (HSG) propulsion system, so that the main engine also generates electricity for the ship. The HSG will generate electrical power for the ship even if the engine power output varies, saving fuel and providing an alternative power source if LNG is unavailable – a prerequisite for class approval.
Rolls-Royce’s Bergen Gas Engines are the only pure gas engines on the market that use a spark-plug ignition. Alternative dual-fuel engines use a small amount of diesel for ignition. The B and C series engines emit around 22 per cent less CO2 per unit of power – including methane slip – than a diesel engine. They reduce NOx emissions by 90 per cent and produce negligible SOx emissions. Bergen gas engines also deliver a significant reduction in fuel and lubrication oil consumption.