MAN PrimeServ Augsburg, a part of MAN Power Options, has accomplished the retrofitting of twin selective catalytic discount (SCR) programs aboard the cruise ship MS Amadea.

Picture: MAN ES

The vessel is chartered by Germany’s PHOENIX Reisen GmbH Bonn and managed by BSM Cruise Companies. Often known as ‘Das Traumschiff’, the Amadea is well-known in Germany as the primary filming set for a well-liked tv sequence.

The retrofit developed by MAN PrimeServ Augsburg built-in an SCR system into each of the Amadea’s four-stroke MAN 7L58/64 propulsion-engines to make sure optimum efficiency.

Based on MAN ES, the retrofit displays a normal want by PHOENIX Reisen to reinforce its environmental friendliness and, extra instantly, allows the vessel to fulfill emission requirements in the important thing Norwegian Heritage Fjord market.

For the challenge, MAN PrimeServ prioritised maintaining hazardous emissions to a minimal whereas sustaining engine efficiency and propulsion effectivity.

“This has been an essential pilot challenge for MAN PrimeServ that finally proceeded easily regardless of the restrictions imposed by the Covid-19 pandemic,” Bernd Siebert, Head of Retrofits & Upgrades, MAN PrimeServ, mentioned.

“Notably, we additionally efficiently delivered the SCR programs pre-equipped with honeycombs to be able to keep the tight schedule. Apart from some minor, technical changes post-installation, we simply reached the required exhaust-gas temperatures for SCR operation and regeneration of the honeycombs in testing. We nonetheless want to find out the precise urea consumption required to realize the mandatory NOx discount, however, fortuitously, the engines have been extra just lately outfitted with new MAN turbochargers such that secure operation of the SCR programs is assured.”

The Amadea challenge required metal work to free area for set up of the SCR programs and ancillary items; the modular SCR system sometimes put in aboard newbuildings was not 100% transferable to a retrofit and required some changes within the case of the Amadea. Mechanical and electrical integration, and system parameterisation, additionally required some sources.

The formal handover of the Amadea to PHOENIX Reisen came about in mid-January 2022 after classification society acceptance.

Technical Superintendent BSM CS, Bosse Berg, and his Engine Staff verified the profitable emission reductions throughout commissioning of the system and acknowledged that they had been satisfied by its efficiency.

“This SCR answer establishes PHOENIX Reisen and BSM CS as trailblazers inside the cruise section by way of emission discount. More and more, we’re receiving requests from cruise and ferry firms that need to enhance their inexperienced credentials and who want to change into sustainable with out the necessity for mandated trade laws. Now we have realized many classes and gained precious business expertise from the complete Amadea challenge that may serve us in good stead on comparable tasks sooner or later,” Siebert added.


MAN PrimeServ Augsburg beforehand retrofitted the Amadea’s turbochargers – within the course of enhancing engine effectivity and considerably decreasing CO2 emissions.

Now, the MAN SCR answer has introduced the Amadea’s engines from Tier 0 standing to Tier III emission degree, and has lowered NOx emissions by 90%, equal to financial savings of 600 tons every year. Based on MAN ES, the SCR system is at the moment the greenest options obtainable available on the market.

The SCR might be obtainable from simply 15% engine load, enabling clear operation, additionally throughout slow-sailing within the fjords in addition to near port and populated areas.

The absolutely modular SCR answer has additionally been fullly built-in into the Amadea’s engine-control set-up. With its closed-loop system and a climate station that makes use of environmental knowledge, the NOx-reduction price is maximised and ammonia-slip minimised to only 10 ppm, akin to that of a automobile.

Low ammonia slip isn’t just good as a result of ammonia is a greenhouse fuel and impacts the local weather, but additionally as a result of it reduces urea consumption, enabling the urea-tank dimension to be minimised.