The Research Of Energy Efficiency Design Index And Its Limitation For New Ships

With the rapid advance of the global economy, marine shipping industry has developed extremely, the carrying capacity has increased enormously, ships become to large-scale day by day, ship’s power increases continuously. The traditional design concepts of "big capacity and high speed" are rooted in people’s mind deeply, so the greenhouse gas emission created by ships go from bad to worse also. Above all, the expenditure of energy and emissions force shipping companies to reconsider the direction of ship development.In order to control CO2emissions from the source of ship design, IMO have proposed the concept and calculation method of ship Energy Efficiency Design Index(EEDI). After some discussions in MEPC meetings, they had already added the part of ship energy efficiency into MARPOL Annex Ⅵ in order to mandatory save energy and reduce emissions.About EEDI itself, this paper has introduced its calculation formula in detail, and explained the significance of the calculation principle and the index. At the same time, the EEDI baseline, as the benchmark of index value, its calculation formula and method are introduced as well.Considering of the whole energy efficiency design level of our servicing vessels lower than the developed countries’, for facing the EEDI going to be enforced soon, the goal to improve the standard of our servicing vessels’EEDI is more important. This paper collected the basic vessel samples’parameters on EEDI, which concluded the capacity above400gross tonnage ships established from1990to2010, from the data base of China Classification Society (CCS). Utilizing the scatter concept, dividing the whole capacity into several small tonnage region, and doing the data processing to the samples in every region, put forward the way of conforming the EEDI reference line which can be accepted to the different control levels. Based on the above, this thesis also gives the method on fitting the EEDI base surface which is accepted to the different control levels.EEDI is going to be enforced soon, the proposed means of conforming the EEDI criterion which is accepted to the different control levels gives some suggestions for the relevant departments. At last, an EEDI calculation program is developed which can be used by ship owners when they making design plan, or by designers making their preliminary design. They can use it to predict the EEDI which enables them to know whether the design can meet the coming mandatory EEDI requirement.