MODIFICATION OF THE EEDI FOR RO-RO PASSENGER SHIPS

摘要

In the 3rd IMO GHG study the new data on the ships emissions indicate a clear need for improvements in shiprnenergy efficiency in order to preserve the environment. Although the majority of the pollution originates from therninternational shipping, the environmental impact of the short-sea shipping, primarily from ro-ro passenger ships,rnshould not be neglected. The pollution originating from these ships is especially pernicious for public health sincernthey operate in and near ports and highly populated areas. The newest amendments to MARPOL Annex VI introducernthe Energy Efficiency Design Index (EEDI). The EEDI should be a measure of ships energy efficiency, but itsrnapplication is limited since it may not be applied to ships with diesel-electric or hybrid propulsion systems. Also thernEEDI seems not to be feasible for the regulation of energy efficiency for ro-ro passenger ships because their designrncriteria vary too much.rnThe aim of this paper is to propose a new approach to the EEDI definition for ro-ro passenger ships. It introduces thernReference surface as the function of ships capacity and speed instead of the Reference line. It also expands thernattained EEDI calculation to different loads trying to give a clearer view of the ships CO_2 emission. This modifiedrnEEDI would then allow a fair comparison between different ro-ro passenger ships.