May 3, 2002
Water-injected Wärtsiläs for products tankers
Wärtsilä Corporation has received a contract to supply the complete power systems for two 14,000 tdw product/chemical tankers under construction for the Finnish energy group Fortum. The tankers have been contracted at Portugal's Estaleiros Navais de Viana do Castelo for delivery in 2003. With a cargo capacity of 16,000 cu m, they are of 140 m length overall by 21.7 m breadth, and have a service speed of 16 knots. They are also being built to ice class 1A Super.
Each Wärtsilä power system comprises a Wärtsilä 8L46 main engine, reduction gearbox with power take-off (PTO) drive, controllable-pitch propeller, and three generating sets, two driven by Wärtsilä 6L20 engines and one by a Wärtsilä 4L20 engine.
With a maximum continuous power of 8,400 kW each, the 8L46 main engines will be equipped with Direct Water Injection (DWI) for reduced NOx emissions. Redundancy in propulsion is given by the PTO drive which will also serve as an auxiliary propulsion drive, with the shaft generator acting as an electric motor supplied by the 1080 kW auxiliary diesel generating sets.
There are other newbuildings under construction for operation by Fortum all powered by Wärtsilä diesel engines, including two larger product/chemical tankers, two escort tugs and two ice-breaking Aframax tankers. All these vessels are being built to a high ice class, and the engines are being arranged for operation at temperatures down to minus 30°C.
The other two product/chemical tankers are 25,000 tdw vessels contracted at the Jinling shipyard in China PRC for delivery in 2003.They will each be equipped with a Wärtsilä 9L46 main engine, reduction gearbox with power take-off (PTO) drive and three Wärtsilä 6L20-engined generating sets. With a maximum continuous power of 9450 kW each, the 9L46 main engines will also be equipped with Direct Water Injection (DWI) for reduced NOx emissions. The PTO generator can also serve as an auxiliary propulsion drive to give redundancy in propulsion.
The two escort tugs contracted at the Spanish shipbuilder Astilleros Armon SA will be propelled by a pair of Wärtsilä 6R32 diesel engines of 4920 kW combined output. The two 106,000 tdw Aframax ice-breaking tankers will be delivered this year from Sumitomo Heavy Industries Ltd in Japan. Each is equipped with a 22.9 MW diesel-electric power plant incorporating two Wärtsilä 9L38B and two 6L38B diesel engines, and one Wärtsilä 6L26 diesel engine.