Energy efficiency design index & energy efficiency operational indicator
Ρασσιάς, Διονύσιος Δ.
SubjectΠλοία -- Κατανάλωση καυσίμων ; Ενέργεια και ενεργειακοί πόροι ; Πλοία -- Περιβαλλοντικές απόψεις ; Περιβάλλον και ενέργεια
The climatic change constitutes an important problem of world scale that its negative consequences appear in our days. The greenhouse gases such as dioxide of coal (CO2) and the ozone (O3) that they are emitted by the ships, contribute negatively to the phenomenon of greenhouse. Regulations, that are continuously modified, have been established for the reduction of ships' emissions, in the Annex VI of MARPOL 73/78. The recent amendments in the annex VI of MARPOL include a system for determining the energy efficiency for new ships through the Energy Efficiency Design Index - EEDI. This index, which is called attained EEDI, is expressed in g-CO2/ton mile which are emitted by each new ship and should be less than a certain value or reference line, which is called required EEDI, depending on the type of the ship, its capacity or deadweight. One other index which has been adopted by IMO for monitoring CO2 emissions is the Energy Efficiency Operational Index (EEOI). This index is expressed in g-CO2/ton mile which are emitted by a vessel and can assist shipowners and ships' operators in the evaluation of the performance of their fleet with regard to CO2 emissions. As the amount of CO2 emitted from a ship is directly related to the consumption of bunker fuel oil, the EEOI can also provide useful information on a ship's performance with regard to fuel efficiency.