MAN Energy Solutions’ after-sales division, MAN PrimeServ, has completed the installation of a SCR (Selective Catalytic Reduction) system to a fishing vessel operated by Norwegian company Ivan Ulsund Rederi, slashing CO2 and NOx emissions.
Brusøyskjær now operates with reduced NOx levels that surpass IMO Tier III standards, while its MAN 6L27/38 main engine´s fuel consumption has been reduced due to other improvements carried out during the refit.
According to PrimeServ, up to 90% of the trawler’s NOx emissions can be reduced – starting from just 15% engine load.
This is due to the intelligent integration of the SCR into the vessel’s engine control system and combining it with sensors before and after the SCR reactor – such as the temperature control – to achieve an optimal emissions reduction.
The SCR can be operated in the engine operation area from 15-100% MCR, dispensing with the need for a cut-out. This facilitates a maximum reduction in NOx taxes for years to come. Many vessel operators – not just those based in Norway – currently benefit from incentive programmes to protect the environment.
During the retrofit, the SCR system was combined with a Tier II upgrade for the engine, including the introduction of a variable frequency drive (VFD) mode, and an upgrade of the Alphatronic 2000 remote control system that will cut fuel consumption by 150,000 litres of MGO annually.
PrimeServ reports that the upgrade will deliver savings of more than 475 tonnes of CO2 and 45 tonnes of NOx per year. In general, MAN’s SCR concept facilitates system installation aboard even the most compact of ship designs.
“The customer expressed a wish to have one point of contact and the same SCR supplier as the manufacturer of the vessel’s main engine, which we were happy to accommodate as it allowed us to devise the best solution for this particular vessel and its operational requirements,” said Mads Færk, head of sales at MAN PrimeServ Norway.
“Despite the very tight schedule and difficulties arising from the corona virus, we were able to fulfil all requests for a minimal SCR footprint, high NOx reduction rate, prompt delivery of all components, and a high- efficiency propulsion system on time.”
