Abstract
A smooth transition to the use of gas engines instead of conventional engines in marine shipping is a logical pathway for compliance with tightening environmental regulations. Currently, five major gas engine concepts are applied in maritime sector. In this paper, a review of the marine gas engine concepts was performed with a focus on the control of combustion and emission. To assess all the contributors to combustion and the emission formation process, three main factors were outlined: design, operational parameters and fuel. The assessment of gas engines was conducted based on these factors. The present paper helps to provide an understanding of the current progress in the development of marine gas engines towards improving of combustion efficiency and reducing the emissions. Moreover, the knowledge gaps, particularly in four-stroke marine high-pressure gas engines, were identified.
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Abbreviations
- ABV:
-
Air-bypass valve
- AFER:
-
Air–fuel equivalence ratio
- BMEP:
-
Brake mean effective pressure
- BOV:
-
Blow off valve
- BTE:
-
Brake thermal efficiency
- CAD:
-
Crank angle degrees
- DF:
-
Dual fuel
- EGR:
-
Exhaust gas recirculation
- EPA:
-
Environmental Protection Agency
- EWV:
-
Exhaust wastegate valve
- ICE:
-
Internal combustion engine
- IMO:
-
International Maritime Organization
- LBSI:
-
Lean-burn spark ignited
- LPDF:
-
Low-pressure dual fuel
- MCP:
-
Maximum combustion pressure
- MN:
-
Methane number
- NOx:
-
Nitric oxides
- PM:
-
Particulate matters
- SCR:
-
Selective catalytic reduction
- SFC:
-
Specific fuel consumption
- THC:
-
Total hydrocarbons
- UHC:
-
Unburned hydrocarbons
- VTG:
-
Variable turbine geometry
- VVT:
-
Variable valve timing
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Acknowledgements
This work was supported by the project ”SFI Smart Maritime (237917)-Norwegian Centre for improved energy-efficiency and reduced emissions from the maritime sector”, which is partially funded by the Research Council of Norway. In addition, the authors would like to thank Sintef Ocean AS and Per Magne Einang for providing valuable information and comments.
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Krivopolianskii, V., Valberg, I., Stenersen, D. et al. Control of the combustion process and emission formation in marine gas engines. J Mar Sci Technol 24, 593–611 (2019). https://doi.org/10.1007/s00773-018-0556-0
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DOI: https://doi.org/10.1007/s00773-018-0556-0