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Caterpillar Supplying Power To Norwegian Vessel

Posted on October 26, 2011

Caterpillar Marine Power Systems was selected to provide 2 x 6 M 25 C and 2 x 9 M 25 C propulsion engines for an Ostensjo Rederi AS offshore supply newbuild. Each 6 M 25 C engine will provide 2000 kW at 750 rpm. The 9 M 25 C will each provide 3000 kW at 750 rpm. All engines feature an air injection system designed to ensure load response remains in a low rpm range. Each engine is also packaged with the Siemens Bluedrive PlusC diesel electric propulsion system. The vessel is slated to begin operations in fall 2013.

“With the new air injection system, Caterpillar can offer a tool that improves the load acceptance capabilities of the engine at any condition” said Andreas Banck, supervisor of the Diesel Engine Test Team of Caterpillar Motoren GmbH. “It’s a simple system with a proven design and as reliable as the engine. Compressed air will be injected after the turbocharger, thus having a diffuser effect that supports the turbocharger performance.”

To reduce environmental emissions, the engines feature an SCR catalyst operating over the load range of 10-100% and a reduction in fuel consumption throughout the operation cycle for an offshore supply vessel, Caterpillar said. Fuel consumption testing results have demonstrated the effectiveness of the IMO II-compliant MaK engines, with average fuel consumption expected to be at least 15% below the fuel consumption of comparable propulsion systems in offshore vessels operating today, according to Caterpillar.

Manufactured in Kiel, Germany, the M 25 engine series features high efficiency turbochargers and a reduced number of components designed for ease of installation and system integration, Caterpillar said. The vessel is being constructed at the Astilleros Gondán S.A. shipyard in Castropol/Spain. The engines will be delivered in spring 2012.

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