Mitsui places first orders for new MAN SCR-HP

Rendering of the SCR-HP reactor with a host two-stroke engine
Rendering of the SCR-HP reactor with a host two-stroke engine
The SCR-HP reactor at Mitsui’s Tamano works
The SCR-HP reactor at Mitsui’s Tamano works

Mitsui (MES) has placed the first orders for MAN Energy Solutions' SCR-HP (Selective Catalytic Reduction – High Pressure) product. MES ordered 3 × SCR-HP (cluster 3) units in connection with the building of three 87,000-DWT bulk carriers for Ocean 21 Holdings.

Each bulker will be powered by a single MAN B&W 6S46ME-B8.5 low-speed engine delivering 9,900 kW at 84 rpm, and aspirated by an MAN TCA66 turbocharger. The engines will accordingly meet IMO Tier III emission standards. Delivery dates for the three SCR-HP packages are set respectively for December 2019, and March and May 2020.

Ralph Klaunig, Vice President, MAN Energy Solutions, said: “The MAN SCR-HP is the market’s most compact system. Regardless, it’s always a challenge – and an important milestone – to land a first reference but we expect MAN SCR-HP sales to push on now as a result of this order. Crucially, we are now the only manufacturer capable of delivering both exhaust-gas after-treatment solutions: high-pressure selective catalytic reduction, and exhaust-gas recirculation – including an electrical turbo blower. This allows our two-stroke customers to choose their preferred option as best fits their situation. It is also another step towards a greener future for the shipping industry and global trade as a whole.”

The SCR-HP comes in six frame sizes, covering engines up to 25 MW with one reactor for the entire exhaust stream. Larger engines will require two reactors, which can be arranged in a multi-setup similar to turbochargers. The SCR-HP system consists of the reactor – including mixing unit, urea injection lance, honeycombs and soot blowers – along with a module-based supply system, as well as the reactor’s control unit that communicates with the engine-control system.

The SCR-HP system is available for Scheme A and Scheme B classification approval. Scheme A approval includes a certification of the complete system on the engine test bed, SCR and original piping. The Scheme B approval, which is well established in MAN Energy Solutions' medium-speed segment, permits MAN Energy Solutions to model the SCR system's performance in Tier III mode based on data in IMO Tier II mode on a test bed. On the parent engine, this mode is certified on board during engine commissioning. This is likely to significantly reduce costs in the engine-approval procedure.

Klaunig continued: “With this engine and turbocharger – both built under license by Mitsui – and the SCR-HP built in-house at our Deggendorf facility, MAN Energy Solutions can rightly call itself a supplier of complete solutions. As an original equipment designer and manufacturer, our product knowledge gives us the greatest competence to develop and fine-tune solutions to our customers’ great benefit.”

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