In the following, the main conclusions from the two concept studies are given. The emission reductions achieved are compared with the overall goal of Green Ship of the Future and the extra cost price for the implementation of the green technologies are estimated.
8,500 TEU container vessel, optimised with following technologies:
Water in fuel system (WIF)
Exhaust gas recirculation system (EGR)
Waste heat recovery system (WHR)
Power and Steam turbine technology
Exhaust gas scrubbers
Goal
Result
30 % reduction of CO2 emissions
90 % reduction of NOX emissions
90 % reduction of SOX emissions
Achieved 11-14 %
Achieved 80 %
Achieved 90 %
Extra costs 10 million EURO (approximately 10% increase compared to a ‘standard ship’ without ‘green technologies’)
Regarding the emission reductions, the results on the NOX and SOX are very promising. When it comes to the reduction of CO2 the results are good, but not as high as the target of 30%.
Conclusion in short
With respect to NOx and SOx we have reached our goals
Reducing NOx and SOx will in some case cost increased CO2 emission
With respect to CO2 the study shows that we still need to work with technical solutions and operation to meet the goal of a 30 % reduction
Further reduction in CO2 must be obtained through continued efforts to reduce vessel resistance, optimised operation (slow steaming, weather routing etc), more effective propulsion systems, more fuel efficient engines, alternative fuel (LNG, Biofuel etc) and addition of alternative green means of propulsion (fuel cells, wind, solar etc)
Further reductions in CO2 will also reduce NOx and SOx emissions
