BIMCO issues updated EEDI Calculator after the intersessional meeting of the Working Group for Energy Efficiency under
Saturday, 21 January 2012 | 00:00
BIMCO issues updated EEDI Calculator after the intersessional meeting of the Working Group for Energy Efficiency under MEPC (EE-WG 2).Of immediate importance is a decision of the working group to remove the ambiguity on calculating a Required EEDI for a Container ship as we have previously pointed out. Outcome of an analysis of the calculation method for deriving the variables that is used to calculate a Required EEDI for a Container ship reveals that it is the full deadweight that shall be used as value “b” in the formula: Required EEDI = a x b-c
The values “a” and “c” are listed for the applicable ship types in Regulation 21 of MARPOL Annex VI (Amendment adopted at MEPC 62)
The reference line for Container ships have thus changed in the EEDI Calculator in version 1.20 – unfortunately in downward direction.
The EE-WG 2 meeting also agreed on several amendments to the calculation guideline for EEDI.
Notably, correction factors for voluntary structural enhancements for all ships, CRS correction for tankers and bulkers built according to CSR, cubic capacity correction for chemical tankers and LNG tankers as well as some updated correction factors for Finnish-Swedish ice-class are now included in the calculator.
New procedure for dealing with shaft generators are also implemented with the important aspect of “verified limitation” of propulsion power for EEDI calculation.
This latter aspect holds potential to solve some of the still outstanding issues, such as; redundant propulsion in general and the risk of designing under powered ships.
We hope that the updated EEDI Calculator will allow users to assess the changed calculation procedures and provide necessary feedback to allow BIMCO to continue to play an active role in the development of the final guidelines.
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