Novel application of large area propeller to optimize Energy Efficiency Design Index (EEDI) of ships

摘要

After globalization environmental pollution and rising fuel costs are posing a major threat to the shipping industry. The reduction of CO_2 emissions has been the key target since IMO's Marine Environment Protection Committee (MEPC) published its findings in 2009. A number of measures resulting in technical and operational reductions were made mandatory in 2011. Among these and nearly all new build ships [9] have to conform is Energy Efficiency Design Index (EEDI). This provides a method of establishing the minimum efficiency of new ships depending on the type and size. With increasing competition the key to survival will be to design and operate the ships efficiently. In the current phase designers relied to retrofit methods and achieved slight gains of hull efficiency. In later phases tougher restrictions will be imposed which needs more changes in ship design. This work is based on propeller relocation as demonstrated in the R&D project "Streamline" initiated by the seventh frame work of European commission which resulted in significant savings in delivered power. An extensive analysis is made in the CFD code Star-CCM+ at Centrum Techniki Okretowej S.A., Gdansk, Poland (CTO) during an internship.