2.1 Reduction of GHG emissions Energy Efficiency Design Index

Tripartite – 18-19 September 2009

Pierre C. Sames

Chairman IACS EG/ENV

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Contents

• EEDI verification

– two stages

– reference speed

– electrical power table

• EEDI baselines

– guidelines

– correction factors

• EEDI safety impact

– minimum speed

• Outlook

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Introduction

• The EEDI guidelines consolidate the results of the discussions from five sessions.

• The formulation for the EEDI has matured and it can now be thoroughly tested, at least for the dominant ship types.

• However, issues related to verification and application remain open and these issues are discussed in the following.

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Two-stage EEDI verification (1/2)

• The two-stage verification process for the EEDI was confirmed and agreed.

• In the view of IACS, the first phase of the verification process should be limited to an examination of input parameters, without a formal approval.

– data examination of input parameters, to check compliance with EEDI requirements before proceeding with the construction,

– sea trials verification to formally verify the ship’s EEDI.

• It is underlined that some EEDI elements cannot and should not be checked before construction and during sea trials. In this sense, guidance is needed.

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Two-stage EEDI verification (2/2)

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EEDI verification – what if?

• When a vessel fails to meet the required EEDI, enforced speed reduction is the most powerful measure.

EEDI for typical 5000 TEU vessel (65.000 DWT)

02468

101214161820

15 17 19 21 23 25

Speed (knots)

g C

O2

/ (t

*nm

)EEDI attained

EEDI required

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EEDI verification – reference speed

• The estimate of the reference speed during design is performed with established methods and tools such as speed-power tables.

• The EEDI condition (full load – for most ship types - at 75% MCR) likely cannot be checked during sea trials. Therefore, an appropriate method (e.g. ISO 15016) needs to be agreed.

• Speed power curves of sea trial and full load conditions and an outline of the estimation method of power curves should be provided by the shipbuilder. This is highly sensitive data!

• IACS shares CESA concerns that sensitive data requires efficient measures of know-how protection in the context of the EEDI verification.

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EEDI verification – electrical power balance table

• Verification of the electrical power balance is required for vessels with diesel-electric propulsion and when a direct calculation of auxiliary power is performed.

• CLIA provided a draft guidance for the verification of this table in MEPC 59/4/28.

• IACS has started contributing to the development of such guidance.

• A workshop with industry is being organised by IACS to align state of the art approval with EEDI-related verification requirements.

• This workshop is planned for beginning of November 2009, at IACS offices in London.

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EEDI baselines

• The baseline format was confirmed.

• The [WG] Chairman suggested that calculation for obtaining the parameter of a and c in the formula should be conducted in a transparent manner within the Organization.

• A guidance for computing baselines is needed.

• IACS pointed to relevant issues when baselines are computed (MEPC 59/4/44). In particular, contact to the original data provider LRFP should be established to ensure correct use of data.

Key results of sampling for EEDI baseline input data (100 samples)

50

60

70

80

90

100

0 10 20 30 40

percent differencen

o s

am

ple

s

(cu

mu

late

d)

Installed main power

Capacity

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EEDI correction factors for CSR

• China suggested to develop correction factors for CSR bulk carriers (MEPC 59/4/20).

• IACS agrees that with application of CSR, hull steel weight would increase and CSR vessels will be penalised when a baseline is derived without taking CSR vessels into account.

• IACS is currently collecting relevant information and is open in principle to a possible co-sponsoring of a submission.

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EEDI – minimum speed

• With an EEDI implemented, IACS is concerned that installed main engine power might be reduced to a minimum.

• It was asked twice recently (ITF and ICS) which minimum speed (and associated minimum installed power) would guarantee safe operation even in adverse conditions.

• IACS recommends that such reserves and margins are credited and appropriate correction factors are included in the EEDI to take account of these.

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Outlook

• IACS continues contributing to the development of the EEDI.

• IACS also sees the industry challenge to meet a possible future emission target.