Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8065031 | Ocean Engineering | 2015 | 13 Pages |
Abstract
This paper presents analyses future powering options for LNG carriers when considering the Energy Efficiency Design Index (EEDI). The IMO has recently approved amendments to MARPOL Annex 6 to extend the application of the EEDI to include LNG Carriers (LNGCs). This paper investigates the impacts of this upcoming EEDI regulation, due to be enforced from September 2015, will have on the design of future LNGCs. The study found that the current EEDI reference baseline is insufficient to stimulate improvements in the design of future LNGCs because the current Dual Fuel Diesel Electric (DFDE) propulsion proposed to be installed on majority of future LNGCs orders already achieves EEDI values that are compliant with the EEDI baseline. Analysis of EEDI values for LNGCs employing the new two-stroke gas injection diesel propulsion system also displayed similar results. However when considering unburnt methane emissions of the DFDE it was seen that the GHG emission index value could potentially rise by up to 115% meaning the EEDI is limited in its value to reduce global warming. This paper also proposes and analyses amendments to the EEDI baseline values for LNGCs as well as suggesting methods to include methane slip emissions into the current EEDI calculations.
Keywords
BOGMARPOLDNVMDOIMODDDHFOHRSGEEDIFPPGHGSTPsmEPCGWPMPPLNGLNG carriersCPPBoil off gasMarine pollutionShip emissionsGas injectionDirect CurrentCarbon dioxideMarine diesel oilInternational maritime organisationHeavy fuel oilHeat recovery steam generatorShip propulsionDET NORSKE VERITASglobal warming potentialCO2Liquefied natural gasGreen house gases
Related Topics
Physical Sciences and Engineering
Engineering
Ocean Engineering
Authors
E. Ekanem Attah, R. Bucknall,