Friday, September 22, 2017

Posted by May 31, 2017

Maritime Propulsion

New Modular Approach for Scrubber Retrofits

Stena Scotia - artist impressions (Photo: DGS)

Damen Green Solutions (DGS) in partnership with Damen Shiprepair & Conversion (DSC) and AEC, the scrubber supplier, is trialling a new technique for retrofitting scrubbers.
 
Designated the Modular Approach, this new process is designed to cut the time that a vessel typically needs to spend in dock from two or more weeks to just a few days. This dramatic reduction in downtime, in combination with a more cost-efficient, certified scrubber, will be welcomed by ship owners and operators. The first installation of this type is already underway for the RoRo cargo vessel Stena Scotia.
 
The key to achieving this sharp fall in downtime for the vessel is maximising the amount of preparatory and manufacturing work that can be completed before the vessel arrives in the dock. This happens in two parallel processes. In one of these, the scrubbers and their supporting systems are fitted into two prefabricated modules while still in the workshop. The first module contains the scrubber plus all the necessary piping and electronics. The second houses all the auxiliary equipment including the pumps, heat exchanger and separators. These can then be tested and optimised in advance of the actual installation.
 
At the same time, preparatory works are undertaken on board the vessel at times agreed with the ship that do not interfere with its scheduled operations. In the case of the Stena Scotia, the preparations on board, including steelwork and pipe-fitting, will take place over a number of weekends during routine overnight stopovers.
 
The result of the prefabrication process plus preparation works means that when the ship does finally arrive at a Damen yard, the technical team can focus on the final stage of the retrofit process; attaching and linking up the two, fully operational modules to a ship that is ready and prepared to receive them. This last stage represents the third module of the operation.
 
Damen Green Solutions, the arm of the Damen Shipyards Group responsible for developing and implementing low-emissions and environmentally-friendly solutions, has oversight of the entire process including commissioning and training. It does this in close coordination with Damen Shiprepair & Conversion (DSC) and, in the case of Stena Scotia, Damen Shiprepair Rotterdam.
 
electronicsDamen Shipyards GroupAuxiliary equipment