Clean Concept for Brostrom Tankers

MAN B&W Diesel A/S, Alpha, Denmark won 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 Brostrom Tankers AB, Goteborg, Sweden. Four vessels will be built by Jinling Shipyard, Nanjing, China, scheduled for delivery during 2006 and 2007. Together with Brostrom Tankers AB, the naval architects and designers Skipskonsulent A/S, Bergen from the Vik & SandVik Group, Norway, have been in charge of this shortsea tanker concept, optimized for North European trade.

The propulsion plant is based on twin, seven cylinder, MAN B&W L27/38 main engines and AziPull thrusters. 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. Main engines and GenSets will, from their turbochargers, lead the exhaust gasses to individual Munters SCR Converters/Silencers. The SCR converters are activated by injection of a solution of urea and water. Imperative for the SCR converters' full NOx reduction efficiency, which are specified to a NOx outlet content of max. 2g/kWh, is a relatively high and steady exhaust gas inlet temperature. For the main engines' load range, with variable operation according to the propeller curve, a special turbocharger matching will be applied to control the exhaust gas outlet temperatures. For controlling the SCR process, including the injection of the urea/water solution at variable engine loads, the engines' electronic speed and fuel index signals are used as input to Munters NO-analyser circuit.

Brostrom Group operates 65 product and chemical carriers from 4,000 to 80,000 dwt, with an average age of seven years. It employs 37 tankers in European trade and transports more than 20 million tonnes of oil products per year. "By this new investment, Brostrom secures the position as being the largest provider of transportation services to customers in the European trade. Brostrom's capacity in product tanker shipping is covered, to a great extent, by Contracts of Affreightment. The design of the new ships and choice of features give Brostrom a competitive edge," said Brostrom CEO Lennart Simonsson.

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