Re-certification of the EEXI  

The following table illustrates possible scenarios and its effect on the approved EEXI:  

Scenario

EEXI re-certification mandatory

EEXI re-certification voluntary

Ship type change

yes

-

Increase in DWT (by adjustment of maximum summer load draft)

Depending on applied change and its influence on required EEXI

yes

Change of lightweight (without modification of drafts)

Yes, in case of installation of additional equipment so that DWT decreases and energy efficiency is substantially altered

Yes, e.g. in case cranes are removed and DWT increases

Propeller retrofit

Yes, in case engine power limitation is effected

yes

Loss of ice class

yes

-

Installation of energy saving devices (ducts, fins, propeller boss cap fins)

Yes, in case engine power limitation is effected

 

Yes, in case model test, CFD or new speed trial is available to verify the improvement in energy efficiency

Bow retrofit

no

No, usually only effective for low speed operation below the EEXI relevant power setting

Installation of air lubrication system

no

Yes, in case new comparative trials with ALS ON/OFF are available

Application of low-friction paint

Yes, in case engine power limitation is effected

 

Yes, in case new speed trials are available or reevaluation of model test or CFD curves based on hull roughness measurments

Performance of new speed trials

Yes, in case engine power limitation is effected

yes

Installation of shaft generator

Yes, in case engine power limitation is effected

yes

Installation of batteries

No

No, not considered in the EEXI scheme

Installation of variable frequency pumps, LED light and other optimised electrical consumers

No

Yes, in case the electric power table is available and electric power consumption is below standard auxiliary power

Conversion to alternative fuel

Yes, in case engine power limitation is effected

yes

Installation of wind assisted propulsion system

no

yes

Use of biofuel/biofuel blends or drop-in of carbon neutral fuels

no

No, as this measure improves the operational effeciency but not the design efficiency

Modification of power limitation, e.g. change from mechanical EPL to ShaPoLi

No, EEXI technical file remains valid but new OMM to be submitted

no

Installation of exhaust gas treatment

no

No, carbon capture is not integrated into EEXI  scheme

Change of ship name, owner or flag

No, IMO number is the relevant identification parameter. Can be updated manually in the existing approved EEXI technical file

yes

Considering the different scenarios, it is important that you check the applicable scenario for your individual ship. Please reach out to your DNV project manager for clarification or address questions through our DATE portal.

EEXI re-certification process

Complying with the EEXI doesn’t have to be hard work: DNV has created a digital self-service tool to generate the required documentation in case an update of the EEXI certification is needed.