Energy Efficiency Design Index (EEDI)
In 2011, IMO accepted the addition of the Energy Efficiency Design Index (EEDI) to MARPOL Annex VI in order to increase the energy efficiency of ships and reduce the CO2 emissions from ships. The Energy Efficiency Design Index (EEDI) was developed to measure the theoretical CO2 emission performance of new ships of 400 gross tons and above, and is used to calculate ship design and machinery performance data. With the mandatory implementation of EEDI, IMO aimed to encourage innovative and technological developments that affect energy efficiency in the design phase of ships. The “Achieved Energy Efficiency Design Index” (Achieved EEDI) value is calculated for all new ships of 400 GT and above, built as of January 1, 2013, making international voyages. This calculated value should be below or equal to the “Required Energy Efficiency Design Index” (Required EEDI) value determined by IMO as a result of statistical studies.
In addition, the Ship Energy Efficiency Management Plan (SEEMP), developed by IMO and aiming to establish a mechanism to increase energy efficiency in companies, has been made mandatory as of January 1, 2013 in order to verify that energy efficiency is taken into account during their operation on all ships of 400 GT and above international voyages (IMO). , 2011). SEEMP provides a viable approach to monitor the efficiency performance of the ship and fleet over time and identifies energy saving measures to be evaluated to optimize ship performance (IMO, 2012).
Improvement cycle of ship energy management
SEEMP should be developed by the company as a ship specific plan. SEEMP aims to improve a ship’s energy efficiency in four steps: “planning”, “implementation”, “monitoring”, “self-assessment and improvement”. These components play a critical role in the continuous improvement cycle of ship energy management (Türk Loydu, 2012).
IMO has created a new indicator, the Energy Efficiency Operational Indicator (EEOI), to help ship operators track their efficiency in terms of fuel consumption and cargo carried. The EEOI is presented as an optional use-based guide with SEEMP for monitoring operational performance (IMO, 2009b).
The energy efficiency of a ship should preferably be numerically monitored based on an international standard. EEOI, developed by IMO, is one of the main monitoring tools created internationally to obtain a numerical indicator of the energy efficiency of an operating ship and/or fleet (Türk Loydu, 2012).
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enau Group, established in 2016, offers sustainable and environmentally friendly advanced engineering solutions in energy, automotive, maritime industry in Germany, Austria and Turkey.
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