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Tuesday, December 15, 2020 

MAN Energy Solutions’ after-sales division in Augsburg, Germany, has developed an ultra-compact SCR system that is to be retrofitted aboard the ‘Amadea’, a cruise ship chartered by Phoenix Reisen of Germany and managed by BSM Cruise Services.

Also known as ‘Das Traumschiff’, the Amadea is well-known in Germany as the main filming set for a popular television series. The retrofit devised by MAN PrimeServ Augsburg calls for the integration of two of MAN’s SCR systems, one each into both of the Amadea’s four-stroke MAN 7L58/64 propulsion-engines, to ensure maximum performance. Installation will begin in September 2021.

The retrofit reflects a desire by Phoenix to enhance its environmental friendliness and, more immediately, will enable the vessel to meet emission standards in the key Norwegian market. For the project, MAN PrimeServ prioritised keeping hazardous emissions to a minimum while maintaining engine performance and propulsion efficiency.

Alexander Schäfer, Head of MAN PrimeServ Turbocharger and Exhaust Gas Treatment said: “The concept of clean cruising is a major, coming trend within the cruise industry and the Amadea therefore runs on high-quality marine diesel oil alone. With our SCR solution, Phoenix and BSM are establishing themselves as trailblazers within the segment in terms of emission reduction. It is always a pleasure to be part of something extraordinary that benefits the environment. We are currently experiencing an increasing number of requests from cruise and ferry companies that want to improve their green credentials and who desire to become sustainable without the need for legislation. We want these companies to know that we can support them, regardless of whether they intend to enter the Norwegian Heritage Fjords or not.”

MAN PrimeServ Augsburg has previously retrofitted the Amadea’s turbochargers – in the process improving engine efficiency and significantly reducing CO2 emissions – and also introduced MGO instead of HFO injection nozzles in order to minimise black-carbon emissions.

The MAN SCR solution will bring the Amadea’s engines up to IMO Tier III emission level, reducing NOx emissions by 90%. MAN claims its SCR system is the greenest solution available on the market with the highest operational readiness and safety: the SCR will be available from just 15% engine load, enabling clean operation during slow-sailing in the fjords as well as close to port and populated areas.

The fully modular SCR will be integrated into the Amadea’s engine control system. With its closed-loop system and a weather station that uses environmental data, the NOx-reduction rate is maximised and ammonia-slip minimised to 10 ppm. Ammonia slip is important because ammonia is a greenhouse gas, and cutting ammonia slip reduces urea consumption, enabling the urea tank size to be reduced.

A feasibility study run by MAN PrimeServ at the beginning of the project confirmed the suitability of the compact, modular SCR system for the limited space available aboard the vessel. Its integration into the narrow funnel is made possible by the special 87cpsi honeycombs and their high reactivity in a two-layer slim reactor design.

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