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Encyclopedia of Marine and Energy Technology

Energy Efficiency Design Index (EEDI)


The CO2  emission index used to evaluate the vessel design. The index compares theoretical CO2  emissions and transport work of a vessel (gCO2 /tnm). The goal is to design future ships with a design index to be stepwise reduced in the period from 2012 to 2018 to a maximum level of possibly 70% compared with the 100% design index valid for average currently designed ships. In August 2009, IMO has published guidelines on the calculation and verification of the EEDI.

Further reading: MEPC.1/Cir.681 and 682