Journal article
Modeling and analysis of performance and emissions of marine lean-burn natural gas engine propulsion in waves
Department of Mechanical Engineering, Technical University of Denmark1
Thermal Energy, Department of Mechanical Engineering, Technical University of Denmark2
Fluid Mechanics, Coastal and Maritime Engineering, Department of Mechanical Engineering, Technical University of Denmark3
Norwegian University of Science and Technology4
In many vessels, the prime mover is a diesel engine, while the researchers recommended using natural gas as an attractive option to comply with the latest emission legislations. This study aims to analyze the dynamic response of a spark-ignition engine fueled by natural gas. Due to the complexity of power system operation in transient conditions, ship propulsion modeling is performed to assess the environmental impact of dynamic load.
A co-simulation modeling in MATLAB- SIMULINK platform was developed to couple the medium-speed, four-stroke, turbocharged, spark-ignition engine to a propeller immersed in seawater. The engine's essential elements were implemented, and the validity of the modeling was evaluated using the manufacturer's data in both steady-state and transient conditions.
The main goal was to determine the importance of the transient loads on the engine response, particularly during harsh weather conditions. Hence, simulations of various wave conditions with multiple wave amplitude, wave direction, and wavelength were conducted. Compared with the steady-state, the transient condition resulted in a deterioration of the combustion efficiency.
Furthermore, the amount of unburned fuel, NOX compounds, and brake specific fuel consumption have increased.
Language: | English |
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Year: | 2020 |
Pages: | 115904 |
ISSN: | 18729118 and 03062619 |
Types: | Journal article |
DOI: | 10.1016/j.apenergy.2020.115904 |
ORCIDs: | Andersen, Poul and Schramm, Jesper |