zabi lr eedi trials

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Lloyds Register: Marine

EEDI Verification: Requirements andEDI Verification: Requirements andproceduresroceduresDr Zabi BazariShip Energy Services ManagerLloyds Register

Paul McStaySenior Environmental Specialist

Lloyds Register

LloydLloyds Maritime Academy Seminar ons Maritime Academy Seminar on A Practical Guide to EEDIA Practical Guide to EEDI, 7th to 8th November 2011, London, UK, 7th to 8th November 2011, London, UK


Agenda

Regulatory requirements and objectives

Verification process

Pre-verification

Final verification

Speed-power verification

Tank testing for EEDI

Speed trials for EEDI

Correction and scaling procedures

Use of numerical tools in verification

Major industry concerns


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Regulatory Requirements


IEEC (International Energy efficiencyCertificate)

Beyond contract date of 1 January 2013, every new ships subject ofMARPOL Chapter 4, will be issued with an IEEC

Format of IEEC is given in Appendix VIII of the MARPOL Annex VI.


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Form of IEEC


Record of construction


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Aspects of EEDI regulations

What do the regulations require? EEDI will be required for each ship

EEDI to be calculated taking into account guidelines developed by theOrganisation

EEDI will form part of the requirement for ships International EnergyEfficiency Certificate (IEEC)

IEEC will be subject to initial survey in accordance with MARPOL AnnexVI Chapter 2 as well as general or partial survey in case of majorconversion

IEEC will be valid for the life of the ship with exception of:

Withdrawal from service

Transfer of flag or

major conversion


EEDI Verification Process


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Main purpose of EEDI verification?

Carbon factor

Ice class factor

Aux il iary power:

PME >=10000KWPAE0.025Me250PME < 10000KWPAE0.05Me

Capacity factor Wave factor

Capacity:

DWT: Bulk carriers,Containers,Tankers,Gas carriers,cargoships,etc.GTR: Passenger Ship

Shaft Motor Waste Heat Energy Saving

Main power:PME=0.75MCR

EEDI =

Att ained Speed

[gCO2/(tonne.nm)]

Main purpose of verification is to ensure that the ship comply wain purpose of verification is to ensure that the ship comply withthEEDI Regulations and relevant GuidelinesEDI Regulations and relevant Guidelines


EEDI Verification

Two-stage verification process:

Details of verification method is given in the IMOMEPC.1/Circ.682.

Pre-verification

Design stage (to demonstrate estimate of theEEDI prior to construction)

Final

Verification

At commissioning trial (to validate the EEDI

and compliance before delivery)


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Verification process

Basic Design Tank Test*,EEDICalculation

Basic Design Tank Test*,EEDICalculation

Submission of additionalinformation

Submission of additionalinformation

Sea TrialSea Trial

Shipowner Shipbuilder Verifier

Development of EEDI Technical FileDevelopment of EEDI Technical File

Application for EEDI pre-verification

Submission of EEDI TechnicalFile

Application for EEDI pre-verification

Submission of EEDI TechnicalFile

Application for EEDI verificationApplication for EEDI verification

Modification and Resubmission of EEDI Technical FileModification and Resubmission of EEDI Technical File

Verification:-EEDI Technical File-- additional information

Issuance of Report of pre-verification

Verification:-EEDI Technical File-- additional information

Issuance of Report of pre-verification

Verification:- Sea trial report- Ship speed calculation

- revised EEDI Technical File

Issuance of Report ofverification and IEEC

Verification:- Sea trial report- Ship speed calculation

- revised EEDI Technical File

Issuance of Report ofverification and IEEC

Start of ship constructiontart of ship construction

Delivery of shipelivery of ship * To be conducted by a testorganisation or a shipbuilder itself.


Pre-Verification

Estimating the EEDI value: Based on model tank testing and design

power requirements

Likely acceptance of computationalmethods for extrapolations, etc

Technical justification to be provided where tank test for an individual ship isomitted (e.g. availability of the results of tank tests for ships of thesame/similar type)

Initial calculation by shipyard within an EEDI Technical File (EEDI-TF)

Submission of EEDI-TF supported by documentary evidence (machinerycertificates, model test speed/power estimation etc.)

Pre-verification report provided by RO (Recognised Organisation)


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Final VerificationDemonstrating compliance to Regulations: Purpose to verify attained EEDI value for each ship

Based on commissioning trial tests

Fully complete the relevant Record of Constructionfor the vessel.

Verification data requirement:

EEDI Technical File (inclusive of calculated EEDI

Sea trial data (report)

Basic design or tank test data

Additional support information EEDI Technical File is expected to have all of the

data needed for EEDI calculations


Major Aspects of Verification


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Major aspects of verification Verification of speed-power curve for Vref:

Tank test observation and scaling methods

Speed trial observation

Extrapolation method from trial conditions to EEDIconditions

CFD prediction and other software tools assurances

Verification of energy saving technologies Availability factors (feff)

Power levels.

Verification of various correction factors: Ice-class (fj)

Weather factor (fw)

Capacity factor (fi)


Speed Trials

Considerations: Purpose is to validate Vref at 75% MCR!

Can be part of normal sea trials procedure

Required for each ship, not just lead ship

Speed / power analysis should be acceptable to IMO requirements: Sea conditions measured to ISO15016:2002 or equivalent;

Ship speed measured to ISO15016:2002 or equivalent and at

more than two points of which range includes the 75% of MCR power;

Development of power curves should account for effects of wind, tideand waves to ISO15016:2002 or equivalent.


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Deriving Speed/Power data: ISO Method

IMO recommended methods: ISO 15016:2002 - Guidelines for the assessment of speed and power

performance by analysis of speed trial data.

Document describes conduct of the trial, parameters to be measured (windspeed, sea state, depth, current);

and how they are corrected:

Step 1: evaluation of acquired trial data.

Step 2: correction of ship's performance for resistance increase.

Step 3: correction of ship's performance for current.

Step 4: correction of ship's performance for air resistance.

Step 5: correction of ship's performance for shallow water.

Step 6: final ship's performance


Deriving Speed/Power data: EquivalentmethodsIMO Guidelines allows use of equivalent methods as against ISO15016:2002: What are these methods?

STA: Ship Trial Analysis?

Shipyard or tank test facilities own developed methods?

Others?

How to deal with equivalent methods?


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Verifying EEDI Industry Concerns

Will all ROs perform verification to the same, consistent basis?

What about differences between yard values and RO values?

What about the differences of approach by different shipyards and modeltank test facilities.

Prior to coming into force and for all existing vessels: How a voluntary EEDIshould be verified?


Any questions?

zabi lr eedi trials

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