Feature 1 | DANISH MARINE INDUSTRIES Denmark goes greener
Main players in Denmark’s maritime industry have set their sights on meeting new environmental goals. A report by Henrik Segercrantz.
I reduce CO2
nitiated 12 months ago, Denmark’s “Green Ship of the Future” project is looking to develop strategies to , SOx, NOx and particulate
emissions from both existing ships and newbuildings. Te project offers a framework within
which to cultivate and demonstrate technologies capable of obtaining a 30% reduction in CO2
emissions, a 90%
reduction in SOx and a 90% reduction in NOx, drawing on a base equivalent to the average emissions of the world fleet in 2007. Areas of focus are: machinery, propulsion, operation and logistics. Participating Danish organisations
include MAN Diesel, A.P. Moller-Maersk, DFDS, Odense Steel Shipyard, Aalborg, ABB, Grontmij Carl Bro, Desmi, APV, DK Group, Injector, Aalborg University, the Danish Centre for Maritime Technology (including Force Technology), and the Technical University of Denmark (DTU). Companies fund their own research projects, although coordination work is funded by the Danish Maritime Foundation. Within the project, tasks are divided
into coordination, workshops and new projects, all coordinated by Thomas Eefsen, senior project manager at Force Technology. Marketing and communication are handled by Hans Otto Kristensen at DTU. Current projects include approaches
using existing technologies, but also some entirely new developments. In each project, the common goal is to be able to present a demonstration model to the Kyoto follow-up conference in Copenhagen at the end of 2009, either as a theoretical study or as a real demonstration case. Many of the projects are to continue aſter 2009. The ‘dual/multi certification’ part of
‘Green Ship’ involves MCR development of main engines with dual or multi-certification for the simple change of MCR rating for any trade route or speed.
The Naval Architect April 2009
Proposal for an innovative ‘tandem’ propeller.
In order to assure optimal efficiency for various routes and ship speed, it is a good idea to be able to set the engine for two or more operating conditions. Te task includes setting the correct specification by the operator and engine manufacturer, in order to receive proper classification and approval, also from the Flag State. Te task is to develop retrofit-packages for the new settings and to do the installations. The project is coordinated by MAN Diesel. Te ‘variable nozzle rings’ unit explores
the way turbocharging with variable nozzle rings can result in high efficiency in a wider load range than is the case for traditional turbochargers, especially at low engine loads, i.e. low speeds. As part of this project, ABB’s new A100 VTG turbocharger with variable nozzle will be
installed onboard Alexander Maersk. Te next stage is two-stage turbocharging, also currently being developed by ABB. Another strand to the Green Ship
project is the ‘optimisation of a waste heat recovery systems’ (WHRS) unit. Some 10% of the shaſt power energy produced by a main engine can be utilised for energy production using existing technologies. The project includes installation of a new exhaust gas fired boiler and turbo generator (steam/gas turbine and generator) on a vessel and optimisation of the WHR system given the available space constraints. WHRS-technology can be further developed to utilise up to 16% of the main engine’s shaſt power for electrical production, project managers maintain. Te project is coordinated by Odense Steel Shipyard.
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