A Study On Main Engine Power And Propeller Of49000DWT Bulk Cargo Ship Based On EEDI

It is well known that harmful material such as greenhouse gas produced by the extensive use of fossil fuels causes environmental pollution. It is a common objective to control greenhouse gas emissions and use less of fossil fuels around the world. The "low carbon era" in harmony with the environment is coming, and energy-saving and emission-reduction become the trend of development of various industries. For the shipping industry, the marine environment protection committee (MEPC) of the international maritime organization approves the control of greenhouse gas emissions (EEDI) as a new ship design of energy efficiency index MAPOL by law in July2011at the62th session, and has put it into compulsory enforcement on January1,2013.Mainly parameters related to EEDI include four aspects:the fuel consumption, energy recycling, the use of clean energy, ship speed and load. In this thesis, the49000DWT bulk carrier built by Wuzhou shipyard of Zhoushan, is selected as the study object and focus is on fuel consumption by the main engine and the propeller affected by the fuel consumption and the carrier speed in order to reduce the influence of EEDI value of the carrier.The research background is first reviewed in this thesis. It is included application of energy-saving technology in domestic and overseas, parameters in EEDI formula, the reference line and the suitable ship type. The significance of this research has also been discussed. The analysis of the influence of the fuel consumption of main engineer and propeller efficiency to the EEDI is then made, and the optimization of the main engineer selection, the propeller design method and the propeller of high performance in domestic and overseas is also involved in detail.Main engine optimization selections and comparisons is then made to choose main engine with low EEDI value. Comparison of different design methods of propellers are made to increase propeller efficiency and reduce EEDI value.Finally, analyses of the several methods to reduce the effects of EEDI value are made in term of the lower speed, improving the utilization rate of high strength steel plate and the performance of propeller. Corresponding solutions according to the problems found in the test of the EEDI are given in the thesis, and the present study can provide a valuable reference for ship design and construction to reduce ship EEDI value and to improve the measurement precision of the EEDI.