MAN Energy Solutions’ after-sales division – MAN PrimeServ Augsburg – has developed an selective catalystic reduction (SCR) solution, which is to be retrofitted on board the ‘Amadea’, a cruise ship chartered by Phoenix Reisen and managed by BSM Cruise Services.
The retrofit designed by MAN PrimeServ Augsburg calls for the integration of two of MAN’s SCR systems for both of the Amadea’s 4-stroke MAN 7L58/64 engines, to ensure maximum performance. The installations will begin in September, 2021.
The fitting of the SCRs will enable the vessel to meet emission standards in the key Norwegian Heritage Fjord 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 & 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 trail blazers 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,” he said.
MAN PrimeServ Augsburg had previously retrofitted the ‘Amadea’s’ turbochargers to improve engine efficiency and significantly reducing CO2 emissions and also fitted MGO instead of HFO injection nozzles in order to minimise black-carbon emissions.
MAN’s SCR solution will bring the ‘Amadea’s’ engines from Tier 0 status to Tier III emission level, and will reduce NOx emissions by 90%, equivalent to savings of 600 tonnes per annum.
The SCR will be available from just 15% engine load, enabling clean operation, especially during slow steaming in the fjords, as well as close to port and populated areas.
The fully modular SCR solution 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 just 10 ppm, comparable to that of a car.
Low ammonia slip is not only beneficial because it is a greenhouse gas and affects the climate, but also because it reduces urea consumption, enabling the urea-tank size to be reduced.
A MAN PrimeServ feasibility study at the beginning of the project confirmed the suitability of the compact, modular SCR system for the limited space available on board the vessel.
Its integration into the narrow funnel is only possible due to the special 87 cpsi honeycombs and their high reactivity in a two-layer slim reactor design, MAN said.
