ISSN 2348-1218 (print) International Journal of Interdisciplinary Research and Innovations ISSN 2348-1226 (online) Vol. 9, Issue 1, pp: (1-5), Month: January - March 2021, Available at: www.researchpublish.com
Marine Energy Design Index and the Effects of Hydrodynamic Design WALID REFAAT GAAFER Arab Academy for Science, Technology and Maritime Transport, Abu Kir, Alexandria, Egypt
Abstract: The thesis wants to give a brief to the effect of the EEDI and application of other indexes than EEDI. But the most important part was to analyze the effect on ship design and hydrodynamics of ship. All the types of ship that is appear in the analysis has shown almost similar pattern of curves. How EEDI will give impact on the ship design parameters, For all the three sorts of vessels, it are often said that, if the vessel is to be designed for slow speed, it is better to have small length, breadth, draft and therefore the prismatic coefficient (Cp) for all speeds, as EEDIreference - EEDIattined value decreases with the increase of these parameters. On the opposite hand, it’s better to extend L/B and B/T at slow speed but, decrease at high speed. This means, the present EEDI formula will influence the designer and ship owner to build small ships in low speed range. Finally we find the result and we can say that, influence of speed and length has the highest impact on EEDI, then the beam. Draft and prismatic coefficient does not have very high effects. So, it is satisfied from this viewpoint, if a maker needs to change the value of EEDI for a particular ship, he should look in to the length and speed first, then width, draft and the prismatic coefficient. Keywords: Marine Energy, Marine Environment, Green House Gases GHG, IMO Regulation EEDI, Hydrodynamics Design.
1. INTRODUCTION In order to control this CO2 emission from shipping, the ship Energy Efficiency Design Index (EEDI) has been formulated by the IMO Marine Environment Protection Committee (MEPC) as a measure of the CO2 emission performance. The basic formulation of EEDI is predicated on the ratio of total CO2 emission per tonne.mile. The amount of CO2 emission depends upon fuel consumption and fuel consumption depends upon the entire power requirement which suggests the EEDI formulation eventually has certain impact on ship design parameters which are closely related to the economic performance of the ship.
2. IMO GHG STUDIES In 2000, the First IMO GHG Study on GHG emissions from ships was published, which estimated that ships engaged in international trade 1996 contributed about 1.8 per cent of the planet total anthropogenic CO2 emissions. The Second IMO GHG Study, published in 2009, estimated international shipping emissions in 2007 to be 880 million tons, or about 2.7% of the worldwide total anthropogenic CO2 emissions. The Third IMO GHG Study, published in 2014, estimated international shipping emissions in 2012 to be 796 million tons, or about 2.2% of the worldwide total anthropogenic CO2 emissions. The Study also updated the CO2 estimates for 2007 to 885 million tons, or 2.8%. MEPC 74 initiated a Fourth IMO GHG Study, for consideration of the ultimate report by MEPC 76 in autumn 2020. This extra study is predicted to supply an update of GHG emissions estimates from international shipping from 2012 to 2018 and future scenarios for shipping emissions from 2018 to 2050.
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