【Confirmation of EEXI Support Service】for non-EEDI vessel
ClassNK Consulting Service Co., Ltd.
1. Service Contents(1) EEXI assessment (EEXI calculation and assessment of MCRlim by EPL(Engine Power Limitation))(2) Propose and provide measures to improve EEXI (EPL, etc.)(3) Development of required documents (EEXI technical file, Onboard Management Manual on EPL)
2. The ship's speed (Vref) used in the EEXI calculation should be obtained from the simple formula, the tanktest results, or CFD analysis.
The simple formula for ship's speed includes a margin of about 5%, so using the power curve based on thetank test results may improve the EEXI value by up to 5%, although not necessarily for all ships.
However, as shown in the table below, additional costs will be incurred, so please consider how to determine
the ship speed in consideration of cost effectiveness.
How to determine the ship speed to be used in EEXI calculations
How to determine
the ship speed

Note(Vref)-(1)
Simple formula-Approx. cost(Additional cost)

Ship speed is calculated using a simple formula based on

No additionalDWT.

chargeThe simple formula includes a margin of about 5%, so theattained EEXI may be worse than the tank test.

-No additional charge-Additional costs will be incurred because the shipyard

Approx. Hundreds

Power curve based

needs to prepare the documents on ship propulsionof thousands ofon theperformance (including tank test reports).

JPY

(2)
tanktestresults-

The attained EEXI value may be improved by up to 5%compared to the simplified formula (but not necessarily forall ships)(3)-

CFD analysis andSince the shipyard had not conducted tank tests, a newApprox. Millions ofCFD analysis is carried out to estimate the power curve.

JPYother numerical-Expensive cost and several months required.

calculations-May not be available at some shipyards.

3. We recommended the EPL as it is the most cost effective way to improve EEXI. Additional fee will be charged
for preparation of EPL Onboard Management Manual.
4. If you would like to request the additional energy saving device (ESD), the draft up, engine tuning, etc. asthe additional measures (EPL + α) in order to reduce the MRClim by EPL, please let us know. We will discusswith shipyard / engine manufacturer about the optimal solutions.

5. When DWT is changed, the attained EEXI is changed, which will also affect the EPL. If you plan to change theDWT in the future due to SOx scrubber retrofit, etc., please let us know.
To request a quote for EEXI support services, please fill out the attached Ship List (Excel) and send it to us(eexi@classnkcs.co.jp), including your desired method of determining ship speed (Vref).
In case of the class other than ClassNK, please input all column.
And, please send the following documents.
・Shipʼs Particular (Hull & Machinery) including the following information-

Ship dimension-

Deadweight / Displacement / Lightweight-

Cargo Capacity-

Class notation (CRS etc.)-

M/E Manufacturer-

M/E Model-

MCR(ME) (kW) / Revolution(ME)(rpm)-Number of sets(M/E)-

A/E Manufacturer-

A/E Model-

MCR(AE) (kW) / Revolution(AE)(rpm)-Number of sets(A/E)-

Type of Propeller(FPP or CPP)) / Propeller Diameter / Number of Propeller blades / Number ofsets(Propeller)-Voltage of each Generator(V)・EIAPP Certificates (each M/E and A/E)
・EEDI technical file (in case of ships to which EEDI was applied)If you have any questions, please do not hesitate to contact us.