2.6 Reduction of GHG emissions
Energy Efficiency Design Index
Tripartite – 8-9 November 2008
Pierre C. Sames
Chairman IACS SG/ENV
Introduction
• The debate at MEPC 58 WG on GHG
emissions focused on technical issues and
the design index for new ships was refined.
• This statement only addresses items
related to the Energy Efficiency Design
Index (EEDI).
• The formulation for the EEDI was refined
and new terms for auxiliary power and
“energy-saving devices” were introduced.
• In addition, an ice-strengthening correction
factor was agreed but not finalised.
Tripartite Beijing - 2008-11-08 and -09
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Issues to be considered for the further
development of the EEDI (1/2)
• The auxiliary power formulation was simplified
– only normal seaload for running main propulsion
– all cargo-related auxiliary power excluded
• IACS welcomes the simplification of the design
index formula. But:
– Is this new formulation for auxiliary power still in
line with the intention to capture all energy
consumers on board?
– Is the simplified formulation for auxiliary power
is accurate enough (for all ship types
considered)?
– Is the simplified formulation consistent with
formulations for other installed power?
Tripartite Beijing - 2008-11-08 and -09
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Issues to be considered for the further
development of the EEDI (2/2)
• New terms related to shaft motors, waste-heat
recovery and innovative energy efficient technology
are suitable to correct the design index value.
• IACS is concerned about the verification of the
availability factor, because:
– it depends on operational usage
– it also depends on conditions which are not
known during the design stage
• The correction factor(s) related to ice-strengthening
are based on submissions by Finland & Canada.
• IACS suggests exploring the use of existing iceclass rating as a possible input parameter to
determine the ice-strengthening correction factor.
Tripartite Beijing - 2008-11-08 and -09
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Safety issues to be considered the further
development of the EEDI
• With an EEDI implemented, IACS is concerned that
installed main engine power might be reduced to a
minimum.
– On one hand, this is exactly what society at large
expects from making ships ever more efficient.
– On the other hand, built-in reserves which may have
helped preventing accidents in the past might be
reduced or eliminated.
• In situations where ships are voluntarily designed and
built with reserves such as
– redundant propulsion
– and additional margins such as hull strengthening,
• IACS recommends that such reserves and margins are
credited and appropriate correction factors are included
in the EEDI to take account of these.
Tripartite Beijing - 2008-11-08 and -09
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Conclusions
• IACS continues contributing to the
development of the EEDI through
– advising industry and flag state
administrations
– own submission(s) with focus on safety
impacts and verification issues of the
envisaged instrument
Tripartite Beijing - 2008-11-08 and -09
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