WinGD has announced that the on-engine NOx reduction solution for marine two-stroke engines will be used for the first time on commercial engines following type approval.
The integrated Selective Catalytic Reduction (iSCR) solution was tested at Mitsui E&S DU (MESDU) Co’s facility in Aioi, Japan.
Three WinGD 5X52-S2.0 engines are being developed for bulk ships under construction at a Japanese shipyard.
The type approval comes after more than two years of service with a prototype version. The most recent model has lower material and production costs, a heating unit for use with heavy fuel oil, and design modifications to further limit ammonia slip.
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In addition to lowering the footprint of off-engine equipment, iSCR reduces pipe needs when compared to low- and high-pressure SCR off-engine systems.
Testing and commissioning are simplified since the engine and NOx abatement system may be tested concurrently prior to installation. Optimised exhaust flow management and engine waste heat contribute to optimum treatment conditions.
On 16 January, representatives from eight prominent classification societies, including ABS, BV, CCS, DNV, KR, LR, ClassNK, and RINA, watched the test.
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WinGD’s 52- and 62-bore engines, including short-stroke models, may be equipped with iSCR technology and run on fuel oil, ammonia, or methanol. Extension to more engines will be considered dependent on market demand.
Peter Krähenbühl, Vice President Product Centre, WinGD, said: “WinGD’s unique on-engine NOx abatement solution secures IMO Tier III compliance while giving operators greater flexibility in engine room configuration and ship design. This new iteration further reduces the cost impact of NOx abatement and improves the efficiency of treatment with both existing and emerging fuels.”
In January, WinGD tested its new X‑DF‑A ammonia-fuelled engine design, with seemingly positive results.