PrimeServ retrofits greenest-ever SCR System for German cruise ship
MAN Energy Solutions’ after-sales division in Augsburg, Germany – MAN PrimeServ Augsburg – has completed the retrofitting of dual SCR systems aboard the ‘MS Amadea’, a cruise ship chartered by PHOENIX Reisen GmbH Bonn (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 very popular television series.
The retrofit developed by MAN PrimeServ Augsburg integrated an SCR system into both of the Amadea’s four-stroke MAN 7L58/64 propulsion-engines to ensure optimal performance.
The retrofit reflects a general desire by PHOENIX Reisen to enhance its environmental friendliness and, more immediately, enables 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.
The Amadea project required steel work to free space for installation of the SCR systems and ancillary units; the modular SCR system typically installed aboard newbuildings was not 100% transferable to a retrofit and required some adjustments in the case of the Amadea. Mechanical and electrical integration, and system parameterisation, also required some resources. The formal handover of the Amadea to PHOENIX Reisen took place in mid-January 2022 after classification society acceptance. Technical Superintendent BSM CS, Bosse Berg, and his Engine Team verified the successful emission reductions during commissioning of the system and stated that they were convinced by its performance.
MAN PrimeServ Augsburg previously retrofitted the Amadea’s turbochargers – in the process improving engine efficiency and significantly reducing CO2 emissions. The combined work carried out on the vessel reflects MAN Energy Solutions’ desire to increasingly become a supplier of complete propulsion solutions.
The MAN SCR solution has brought the Amadea’s engines from Tier 0 status to Tier III emission level, and has reduced NOx emissions by 90%, equivalent to savings of 600 tons per annum. MAN’s 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, also during slow-sailing in the fjords as well as close to port and populated areas.
The fully modular SCR solution has also been fullly integrated into the Amadea’s engine-control set-up. 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 just good because ammonia is a greenhouse gas and affects the climate, but also because it reduces urea consumption, enabling the urea-tank size to be minimised.
A feasibility study by MAN PrimeServ at the project’s beginning confirmed the compact, modular SCR system’s suitability for the limited space available aboard the vessel. Its integration into the narrow funnel is only possible due to the special 87cpsi honeycombs and their high reactivity in a two-layer slim reactor design.
