TWO-PART MODELLING FORMAT FOR MODELLING MARINE DIESEL ENGINES IN JOULES

ii The modelling approaches can go to two extremes: fully data-oriented and fully process oriented. Modelling for diesel engines is not excluded. Usually data-oriented is computational friendly and accurate and the latter is detail and flexible. A high-speed diesel engine model is missing in project JOULES. In the project, engine manufacturers has already provided data-oriented medium-speed model. The objective of this work is to develop a generic diesel engine model and use it within JOULES so that it can fill in the vacancy of high speed diesel engine model as well as using for other engines. A two-part modelling format was proposed to provide flexibility and user-friendliness. Modifications including adding three sub-models, changing interface have been made to the DE A diesel model in order to satisfy the outputs requirement from JOULES, be converted into FMUs and fit into the two-part modelling format. A set of six versions of process part were achieved and the data part interface was determined. Sensitivity analysis was done to support the use of newly added sub-models. After validating all model versions, the mode was used in the case provided by Navantia. The results showed that the two-part modelling format is accurate enough for the work and extremely flexible. However, a long simulation time was recorded due to the use of FMUs. ii