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Acids in the chamber, history by BOB?

Rechten: Alle rechten voorbehouden

Acids in the chamber, history by BOB?

Rechten: Alle rechten voorbehouden

Samenvatting

The title of this report can’t be interpret otherwise, the Blending-on-Board unit, or BOB-unit, placed two years ago on board of Maersk Line vessel is a piece of technology that shows a high range of flexibility when it comes to sailing with different kinds of Sulphur levels in the used fuels on board.
After two years of running time, there existed a desire to evaluate whether the result were in such a positive way that placement of the unit on board of new built ships and existing ships is recommended.
The research started with the analyses of the data on fuel, lubrication and cylinder lubrication oil in order to draw a conclusion on the savings that are made by the installation of this unit. A major difference is made between short time savings and future savings.
In combination with this a critical analysis of the engines cylinder components will be made to give explanation and visualize current status of the engine. Along with other qualitative research methods conclusions can be drawn on the lifetime contribution of these components brought by the BOB-unit.
Before the field work was done a literature study gives the reader all background information that is needed for a good understanding of the BOB-unit and its’ (dis)advantages. Other information about common wear mechanisms happening in the chamber will be given in this chapter. Also attention was given to cold corrosion, a mechanism that cannot be avoided just by only proper lubrication.
Results in this report show that for short-time savings no conclusions can be taken, as the cylinder oil lubrication consumption has become a steady factor, while before placement a wide spread of consumption can be seen for this consumption. As the vessel was sailing on different routes and so on different schedules no conclusion were being drawn on the fuel savings that could be made. Such testing procedures must only be made when having steady running conditions on a certain engine load. Models showing that the consumption in the higher loads, above 20 MW, a decrease of the consumption was seen, but this is based on minor measurements. Minor measurements caused due to the low loads that is required by the present sailing schedule.
For long-time savings the major factor was remaining an optimum engine condition, which is shown to be accomplished after placement of the BOB-unit. In order to sail another 5 years or more with these ’98 built vessels it is imperative to keep the engine in the highest quality and therefore can be stated that BOB optimizes this. In this case high cost of critical equipment can be avoided, such as cylinder liners, pistons, piston rings etc.
These conclusions state that it is recommended placing BOB-units on board of Maersk Line ships, not only on the new built vessels, but also vessels which have a few years to remain in operation.

Toon meer
OrganisatieHZ University of Applied Sciences
OpleidingMaritiem Officier
InstituutDe Ruyter Academie
PartnersMaersk Line A/S, Copenhagen, Denemarken
Gepubliceerd in
Datum2017-07-11
TypeBachelorscriptie
TaalEngels

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