MAN Energy Solutions’ after-sales division, MAN PrimeServ, has completed a retrofit aboard the ‘Ambience’, a vessel belonging to Ambassador Cruise lines, managed by Bernhard Schulte Cruise Services. The scope of the project covered the installation of SCR (Selective Catalytic Reduction) systems, while two of the ship’s four MAN 8L58/64 engines replaced their NA57/T turbochargers with modern MAN TCA 66 units. 

The order came about when Ambassador overtook the Ambience with the intention of offering cruises in the key Norwegian Heritage Fjord market with its exacting Tier III emission standards.

Olaf Gunia, Head of PrimeServ Hamburg, said: “This retrofit really establishes Ambassador’s green credentials within the cruise segment and the SCR solution is performing well with a NOx removal rate of 93%. Increasingly, we are receiving similar requests from cruise and ferry operations that wish to become sustainable without the need for mandated industry legislation.

Bernd Siebert, Head of Retrofits & Upgrades, MAN PrimeServ, said: “This entire project proved challenging owing to – among other factors – the long cold lay-up of the ship due to the covid-19 pandemic, and the tight timeframe for completion. Happily, our work on the Ambience has optimised the interaction between the newly installed SCR system, turbochargers and engines and the vessel is now Tier III-compatible and fit for service in one of the globe’s most pristine, natural environments.” 

SCR technical considerations 

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 fully integrated into the Ambience’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.

Highlights

AS Labruna launches the HEVOlution range of hybrid generators

The first model in the range, HEVOlution 80-37, made its world debut at the Metstrade in Amsterdam, the most prestigious international trade fair for nautical components, representing a decisive step towards innovative and environmentally friendly energy solutions.

Diesel of the Year 2025: dawn of the Hyundai DX05 & DX08

The Korean star is also reflected in the Diesel of the Year. South Korea is in the empire of industrial powers, cinema in the author anthology, K-pop in the playlist of teenagers. The 2025 edition is about Hyundai Infracore DX, 4- and 6-cylinder modular (BxS 110x132 mm), which have what it takes to ...

Alternative Engine Award: FPT under the sign of multi-fuel

An award that seems tailor-made for the XC13 by FPT Industrial. It is the Alternative Engine Award. The 13-litre has always been the star of the Cursor family and in the new X version it has been applied since its birth to IVECO trucks and, in the hydrogen version, has been on the ski slopes for thr...

Related articles

AS Labruna launches the HEVOlution range of hybrid generators

The first model in the range, HEVOlution 80-37, made its world debut at the Metstrade in Amsterdam, the most prestigious international trade fair for nautical components, representing a decisive step towards innovative and environmentally friendly energy solutions.

Scania Next Generation: the DC13 takes the sea

The Diesel of the Year 2023, the Scania Next Generation DC13, has taken the dive. At the SMM we were told this beautiful story by Neeraj Sharma, global sales development manager e-mobility, sales and marketing, Power Solutions, and Oleg Nikitin, product manager, Power Solutions. Read the full story ...

MAN Energy Solutions received many orders for methanol engines

Bjarne Foldager – Country Manager, Denmark – MAN Energy Solutions, said: “Along with methane and ammonia, methanol is one of the low- and zero-carbon fuels that will underpin shipping’s quest for decarbonisation. We ultimately expect methanol to figure prominently as a future fuel across all vessel ...