Ship emission model validation with noon reports
report
Within the European Sustainable Shipping Forum (ESSF), sub-group Air Emissions, as well as within the Dutch authorities’ Energy Act, the need for an evaluation of emission models was identified. Shipping models are based on measurable variables which are not directly related to emission, such as Gross tonnage or ground speed. The relation between power and speed over ground is used to calculate emissions based on grams emission per produced kilowatt by applying an emission factor. The actual emission factor can be considered sufficiently accurate. The relation between power and speed over ground however is questionable as this relation is affected by many parameters such as loading condition, trim, fouling, water depth, current and weather. Moreover the operation as well as the technical configuration of vessels have been modified over
time; vessels are trading at lower speeds and engines have been optimised to this pace. The industry has been under enormous commercial pressure resulting in efforts being made to reduce fuel consumption per shipped unit of cargo as much as reasonably possible. An evaluation of the used models is therefore required.
time; vessels are trading at lower speeds and engines have been optimised to this pace. The industry has been under enormous commercial pressure resulting in efforts being made to reduce fuel consumption per shipped unit of cargo as much as reasonably possible. An evaluation of the used models is therefore required.
TNO Identifier
1006545
Publisher
MARIN
Collation
42 p.