Conclusion and Recommendations
6.2 Recommendations for future work
− Further development and validation of engine modeling for direct coupling to the methane slip Model 2,
This is a big step to provide a separated methane slip output with the sources from the engine modeling without a need to couple to the MATLAB developed program. The main issue is the run time of the modeling.
− Considering variable wall temperature to track influences on flame quenching,
Flame quenching is very sensitive to the wall temperature. While it was divided into three constant temperature zones in this study, developing the wall temperature calculation code may provide a more accurate result for flame quenching and total methane slip.
− Detailed data analysis to categorize the load variation in each load condition,
It is essential to know how critical is each wave condition and how much time is an engine in calm weather, in severe conditions, or in between.
The magnitude of load variation in each condition, is crucial for further assessment of natural gas engines for marine application.
− Assessing cyclic variation on total methane slip in transient conditions, The available cyclic of variation methods are suitable for a steady-state. It is essential to develop the transient condition models where the input data for the cyclic of variation model changes in each cycle.
− Examining fuel quality on methane slip,
Fuel quality is a controversial challenge in marine applications. The methane number of natural gas fuels plays a remarkable role in combustion.
worldwide, examining the fuel properties is recommended.
− Catalytic modeling and examination for methane slip reduction,
Employing and modeling a monolith catalyst to oxidize the unburned fuel into the H2O, with a specific focus on temperature variation during the transient condition is recommended.
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