Energy Efficiency Design Index
The Energy Efficiency Design Index (EEDI) is a value that indicates the specific CO 2 emissions from cargo ships . The new Chapter 4 of Annex VI is an amendment to the MARPOL Convention and was initiated to also take into account CO 2 emissions from shipping, which are only dependent on fuel consumption.
The guidelines for the EEDI were u. a. Adopted at the 63rd meeting of the Marine Environment Protection Committee (MEPC) of the IMO in March 2012.
- Resolution Mepc. 212 (63) - 2012 Guidelines On The Method Of Calculation Of The Attained Energy Efficiency Design Index (EEDI) For New Ships
- Resolution Mepc. 214 (63) - 2012 Guidelines On Survey And Certification Of The Energy Efficiency Design Index (EEDI)
- Resolution Mepc. 215 (63) - Guidelines For Calculation Of Reference Lines For Use With The Energy Efficiency Design Index (EEDI)
The Energy Efficiency Design Index applies per ton of cargo and nautical mile traveled and is determined from the ship's data using the following equation:
- EEDI = (CO 2 emissions) / transport work
The CO 2 emissions can easily be calculated from the engine power multiplied by the specific fuel consumption of the engines and the CO 2 factor. The transport work results from the load weight ( load capacity ) multiplied by the speed.
Applied applies:
- EEDI = (engine power * specific fuel consumption * CO 2 factor) / (load capacity * speed) with the dimension [kg CO 2 / (t * sm)]
As a rule of thumb, the specific fuel consumption for diesel engines in cargo ships is 0.2 kg / kWh, and around 3 kg CO 2 / kg fuel can be used for the CO 2 factor for the typical fuel heavy oil .
The Energy Efficiency Design Index is shown in a diagram as the baseline for new freighters ( tankers , bulk carriers and container ships ) depending on their carrying capacity in tdw and must not be exceeded. This baseline is adapted to technical progress at regular intervals, i. H. newer ships will operate with lower emissions. The other types of ships such as B. RoRo and ferry ships , cruise ships and other passenger ships as well as the large group of special ships ( tugs , utilities , fishing ships , excursion ships) are taken into account later, as the load capacity plays no or only a subordinate role here. Corresponding correction factors for the above equation are currently being determined for these ships.