Abstract
In comparison to onshore facilities, ships, and their machinery are subjected to challenging external influences such as rolling, vibration, and continually changing air & cooling water temperatures in the marine environment. However, these factors are typically neglected, or their consequences are deemed to have little effect on machinery, the environment, or human life. In this study, seasonal air & seawater temperature effects on marine diesel engine performance parameters and emissions are investigated by using a full-mission engine room simulator. A tanker ship two-stroke main engine MAN B&W 6S50 MC-C with a power output of 8 600 kW is employed during the simulation process. Furthermore, due to its diverse risks, the Marmara Region is chosen as the application area for real-time average temperature data. Based on the research findings, even minor variations in seasonal temperatures have a significant influence on certain key parameters of a ship’s main engine including scavenge pressure, exhaust temperatures, compression and combustion pressures, fuel consumption, power, and NOx−SOx−COx emissions. For instance, during the winter season, the cylinder compression pressure (pc) is recorded at 94 bar, while the maximum pressure (pz) reaches 110 bar. In the summer, pc experiences a decrease of 81 bar, while pz is measured at 101 bar. The emission of nitrogen oxides (NOx) exhibits a measurement of 784 parts per million (ppm) during winter and 744 in summer. The concentration of sulfur oxides (SOx) is recorded at 46 ppm in winter and 53 in summer. Given the current state of global warming and climate change, it is an undeniable fact that the impact of these phenomena will inevitably escalate.
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Abbreviations
- ṁ f :
-
Fuel Mass Flow
- H l :
-
Fuel Lower Heating Value
- V o :
-
Engine Cylinder Operating Volume
- p c :
-
Compression Pressure
- p e :
-
Mean Effective Pressure
- p z :
-
Maximum Combustion Pressure
- η e :
-
Engine Effective Efficiency
- η i :
-
Indicated Efficiency
- η m :
-
Mechanical Efficiency
- D :
-
Cylinder Bore
- DNV:
-
Det Norske Veritas
- ERS:
-
Engine Room Simulator
- FO:
-
Fuel Oil
- IEC:
-
International Electrotechnical Commission
- IMO:
-
International Maritime Organization
- LO:
-
Lubrication Oil
- ME:
-
Main Engine
- n :
-
Measured Revolution Speed
- P e :
-
Measured Effective Power
- P i :
-
Measured Power
- P ml :
-
Power of Mechanical Losses
- r/min:
-
Revolution Per Minute
- s :
-
Cylinder Stroke
- SFCo :
-
Specific Effective Fuel Consumption
- SFC:
-
Specific Fuel Consumption
- STCW:
-
Standard of Training Certification and Watchkeeping
- SW:
-
Seawater
- z :
-
Number of Engine Cylinders
- τ :
-
Engine Stroke
- Φign :
-
Ignition Angle
- Φpz :
-
Timing Angle
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Article Highlights
• Seasonal air & seawater temperature effects on two-stroke marine diesel engine performance were investigated in this study.
• Measurements were taken from a 183-meter product tanker ship equipped with a MAN B&W 6S50 MC-C main engine.
• According to the findings, minor seasonal temperature variations have a significant impact on atmospheric pollution.
• The main engine scavenge pressure, exhaust temperatures, compression and combustion pressures, NOx−SOx−COx emissions, and fuel consumption were critically affected.
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Ceylan, B.O. Investigation of Seasonal Effects on Two-Stroke Marine Diesel Engine Performance Parameters and Emissions. J. Marine. Sci. Appl. 22, 795–808 (2023). https://doi.org/10.1007/s11804-023-00383-1
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DOI: https://doi.org/10.1007/s11804-023-00383-1