First Tier-III-Compliant, Two-Stroke Engine Unveiled in Japan

Thursday, March 24, 2011

MAN Diesel & Turbo confirms that MAN B&W 6S46MC-C8 engine with integrated SCR fulfils the IMO’s strictest emission standards
The engine, an MAN B&W 6S46MC-C8 type capable of an output of almost 7 MW, was constructed in autumn 2010 by Hitachi Zosen Corporation at its Ariake works in southern Japan. The engine is bound for a general cargo carrier, to be built at the Nakai shipyard and scheduled to enter active service later this year. The vessel was ordered by Japanese customer,  BOT Lease Co. Ltd., and is operated by Nissho Shipping Co. Ltd.
The first engine-start took place in January 2011. In connection with this, MAN Diesel & Turbo dispatched a team to Japan to commission the engine-control system – the first in a series of planned visits. The team also optimised the integration of the SCR system that removes NOx from the engine’s exhaust gas.

The SCR system features:
*  more than 80% NOx reduction based on the load cycle
*  more than 70% NOx reduction on each load point in the load cycle
*  easy switching between on/off modes for optimal emission performance on high seas and coastal waters.

Ultimately, MAN Diesel & Turbo confirmed  that, in a world-first, the engine meets all emission requirements as stipulated by the International Maritime Organisation’s Tier-III legislation, due to come into force in 2016.

Tailored system
When bringing two-stroke engine performance up to Tier-III standard, MAN Diesel & Turbo considers both SCR (Selective Catalytic Reduction) and EGR (Exhaust Gas Recirculation) techniques. Based on a  general evaluation of two-stroke MAN B&W engines, a high-pressure, urea-based SCR configuration was chosen as the optimal SCR solution.

Søren Jensen – Vice President Research & Development, Marine Low-Speed MAN Diesel & Turbo – said: “We haven’t just provided an engine and added an SCR system to it. On the contrary, we have delivered a bespoke system. As engine designer, builder and catalyst designer, MAN Diesel & Turbo and Hitachi Zosen comprise a group of specialists that have delivered an optimised propulsion/emissions package of engine, engine-control system and SCR system.”
 
Jensen concluded: “In the future, MAN Diesel & Turbo wants not only to develop engines but also to design engines with complete, emission-reduction systems. To that end, we envisage collaborating with many other partners in times to come in the same successful fashion as we have seen in Japan.”
 
Technical characteristics To achieve the desired, higher exhaust-gas temperature and maximise NOx removal, the different elements of the emissions package are laid out in series, with the SCR system placed before the turbocharger.

MAN Diesel & Turbo’s engine-control system has a number of different ways to ensure the correct, exhaust-gas temperature. Uniquely, MAN Diesel & Turbo holds patents for a number of these methods.

Maritime Reporter November 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

Royal Caribbean to Install Scrubbers on 19 Ships

Royal Caribbean Cruises Ltd. (RCL) will retrofit 19 of its ships with advanced emissions purification (AEP) systems. These systems, also known as scrubbers, will

Wärtsilä to Power LNG-fuelled RoPax Ferry

A new passenger ferry being built for Swedish operator Rederi AB Gotland will be fuelled by liquefied natural gas (LNG) and will feature a Wärtsilä integrated solution.

Keeping to the Schedule in the Pacific Northwest

When a tightly scheduled repower for the Kodiak-based trawler Sea Mac in early December took a very bad turn, Mike Fourtner used his 25 years of fishing experience

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Pipelines Pod Propulsion Port Authority Salvage Ship Electronics Ship Simulators Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2859 sec (3 req/sec)