June 15, 2004
MAN B&W diesels for "clean design" products/chemical tankers
MAN B&W Diesel A/S, Alpha, Denmark has been awarded the contract to supply a twin medium speed main engine package to drive AziPull propellers for a series of 14,500 DWT Oil Products and Chemical tankers.
MAN B&W Holeby GenSets will be supplied by a Chinese licensee.
The vessels are under construction for Broström Tankers AB, Göteborg, Sweden at Jinling Shipyard, Nanjing, China. The newbuildings are scheduled for delivery during 2006 and 2007.
Auxiliary power is generated by four MAN B&W 6L16/24 GenSets.
A total main engine output of 4,760 kW (6,470 BHP) will supply the propeller thrust, for a ship service speed of around 13 knots.
The twin configuration will make it possible to carry out maintenance on the propulsion system during the tanker's regular trade. Immobilization, repair and maintenance work could be carried out on one system with the ship alongside a terminal, with the other engine and propulsion system available in case of any need for the vessel to move away from the quay.
A relatively high and steady exhaust gas temperature is needed for the SCR converters to achieve full NOx reduction efficiency--specified as a NOx outlet content of max. 2g/kWh. A special turbocharger matching will be applied to control the exhaust gas outlet temperatures for the main engines' load range, with variable operation according to the propeller curve.
All six diesel engines in the engine room will be fitted with catalysts for NOX reduction. This concept will make it possible to reduce the NOX emissions by 98%.
Due to the fact that the vessels will spend 50% of their time in ports and terminals, the vessels will also meet requirements for low noise levels. Environmental care has been a very important issue in the development and designing of the vessels. Propulsion redundancy and the cleaning of exhaust gasses are vital ingredients in this respect. Further environmental efforts have been made on technical solutions related to safety, cargo handling productivity and maneuverrability.
Breadth 22 m
Draft 8 m
Deadweight 14,500 tonnes
Cargo capacity 18,700 cu.m
Speed 13 knots