The lightweight, in-line scrubbers are a hybrid technology developed by Yara Marine Technologies that are able to operate in dry mode, open loop and closed loop. Five scrubbers were installed, one per engine, covering the whole propulsion system. Collectively, they are capable of reducing up to 99% of sulfur oxides and 85% of particulate matter in exhaust.
A two-year project, Norwegian Jewel’s retrofitting began in spring 2014 and involved more than 100,000 man-hours among numerous partner organizations.
The system uses the latest water membranes filtration unit. This employes ultrafiltration technology to clean the recirculated water during the closed loop operation down to clear water. The by-product is collected and removed in drums.
Norwegian currently has three ships outfitted with scrubbers, with Norwegian Jewel joining Norwegian Escape and Pride of America. The company said it's on track to meet the MARPOL Annex VI compliance requirement of reducing sulfur emissions from 3.5% to 0.5% by 2020.
Norwegian Jewel’s sister ships, Norwegian Pearl and Norwegian Gem, will complete their scrubber commissioning within the coming weeks, and Norwegian Jade and Norwegian Sun are scheduled for retrofitting in the first and second quarter of 2017, respectively.
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