The Impact of Diesel Injection Strategy and In-Cylinder Temperature on the Combustion and Emissions of Ammonia/Diesel Dual-Fuel Marine Engine
This study investigates the impact of different combustion control strategies on marine engine combustion and emission characteristics at a high ammonia energy ratio. Compared to the strategy of maintaining a constant fuel injection duration, the strategy of keeping the fuel injection pressure const...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/18/14/3631 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849246543550349312 |
|---|---|
| author | Wei Guan Songchun Luo Jie Wu Hua Lou Lei Wang Feng Wu Li Li Fuchuan Huang Haibin He |
| author_facet | Wei Guan Songchun Luo Jie Wu Hua Lou Lei Wang Feng Wu Li Li Fuchuan Huang Haibin He |
| author_sort | Wei Guan |
| collection | DOAJ |
| description | This study investigates the impact of different combustion control strategies on marine engine combustion and emission characteristics at a high ammonia energy ratio. Compared to the strategy of maintaining a constant fuel injection duration, the strategy of keeping the fuel injection pressure constant allows the kinetic energy of diesel to remain at a higher level. This results in an increase in combustion efficiency and indicated the thermal efficiency of the engine, while also reducing CO<sub>2</sub> and soot emissions. However, when the ammonia energy ratio increases to more than 50%, the indicated thermal efficiency starts to decrease along with the increase in the emissions of N<sub>2</sub>O and unburned ammonia. To address these issues, one of the potential means is to improve the in-cylinder combustion environment by increasing the in-cylinder gas temperature. This can enhance combustion efficiency and ultimately optimize the performance and emission characteristics of dual-fuel engines, which results in an increase in the combustion efficiency to 98% and indicated thermal efficiency to 54.47% at a relatively high ammonia energy ratio of 60%. Emission results indicate that N<sub>2</sub>O emissions decrease from 1099 ppm to 25 ppm, while unburned ammonia emissions drop from 16016 ppm to 100 ppm. Eventually, the greenhouse gas emissions were reduced by about 85.3% in comparison with the baseline case. |
| format | Article |
| id | doaj-art-2bc95cd1cb754b16ab823a3070bf8842 |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-2bc95cd1cb754b16ab823a3070bf88422025-08-20T03:58:27ZengMDPI AGEnergies1996-10732025-07-011814363110.3390/en18143631The Impact of Diesel Injection Strategy and In-Cylinder Temperature on the Combustion and Emissions of Ammonia/Diesel Dual-Fuel Marine EngineWei Guan0Songchun Luo1Jie Wu2Hua Lou3Lei Wang4Feng Wu5Li Li6Fuchuan Huang7Haibin He8Ningbo C.S.I. Power & Machinery Group Co., Ltd., Ningbo 315020, ChinaSchool of Mechanical Engineering, Guangxi University, Nanning 530004, ChinaNingbo C.S.I. Power & Machinery Group Co., Ltd., Ningbo 315020, ChinaNingbo C.S.I. Power & Machinery Group Co., Ltd., Ningbo 315020, ChinaNingbo C.S.I. Power & Machinery Group Co., Ltd., Ningbo 315020, ChinaCollege of Energy Engineering, Zhejiang University, Hangzhou 310027, ChinaSchool of Mechanical Engineering, Guangxi University, Nanning 530004, ChinaSchool of Mechanical Engineering, Guangxi University, Nanning 530004, ChinaNingbo C.S.I. Power & Machinery Group Co., Ltd., Ningbo 315020, ChinaThis study investigates the impact of different combustion control strategies on marine engine combustion and emission characteristics at a high ammonia energy ratio. Compared to the strategy of maintaining a constant fuel injection duration, the strategy of keeping the fuel injection pressure constant allows the kinetic energy of diesel to remain at a higher level. This results in an increase in combustion efficiency and indicated the thermal efficiency of the engine, while also reducing CO<sub>2</sub> and soot emissions. However, when the ammonia energy ratio increases to more than 50%, the indicated thermal efficiency starts to decrease along with the increase in the emissions of N<sub>2</sub>O and unburned ammonia. To address these issues, one of the potential means is to improve the in-cylinder combustion environment by increasing the in-cylinder gas temperature. This can enhance combustion efficiency and ultimately optimize the performance and emission characteristics of dual-fuel engines, which results in an increase in the combustion efficiency to 98% and indicated thermal efficiency to 54.47% at a relatively high ammonia energy ratio of 60%. Emission results indicate that N<sub>2</sub>O emissions decrease from 1099 ppm to 25 ppm, while unburned ammonia emissions drop from 16016 ppm to 100 ppm. Eventually, the greenhouse gas emissions were reduced by about 85.3% in comparison with the baseline case.https://www.mdpi.com/1996-1073/18/14/3631ammoniadual-fuelmarine enginecombustion strategycombustion and emission |
| spellingShingle | Wei Guan Songchun Luo Jie Wu Hua Lou Lei Wang Feng Wu Li Li Fuchuan Huang Haibin He The Impact of Diesel Injection Strategy and In-Cylinder Temperature on the Combustion and Emissions of Ammonia/Diesel Dual-Fuel Marine Engine Energies ammonia dual-fuel marine engine combustion strategy combustion and emission |
| title | The Impact of Diesel Injection Strategy and In-Cylinder Temperature on the Combustion and Emissions of Ammonia/Diesel Dual-Fuel Marine Engine |
| title_full | The Impact of Diesel Injection Strategy and In-Cylinder Temperature on the Combustion and Emissions of Ammonia/Diesel Dual-Fuel Marine Engine |
| title_fullStr | The Impact of Diesel Injection Strategy and In-Cylinder Temperature on the Combustion and Emissions of Ammonia/Diesel Dual-Fuel Marine Engine |
| title_full_unstemmed | The Impact of Diesel Injection Strategy and In-Cylinder Temperature on the Combustion and Emissions of Ammonia/Diesel Dual-Fuel Marine Engine |
| title_short | The Impact of Diesel Injection Strategy and In-Cylinder Temperature on the Combustion and Emissions of Ammonia/Diesel Dual-Fuel Marine Engine |
| title_sort | impact of diesel injection strategy and in cylinder temperature on the combustion and emissions of ammonia diesel dual fuel marine engine |
| topic | ammonia dual-fuel marine engine combustion strategy combustion and emission |
| url | https://www.mdpi.com/1996-1073/18/14/3631 |
| work_keys_str_mv | AT weiguan theimpactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT songchunluo theimpactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT jiewu theimpactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT hualou theimpactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT leiwang theimpactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT fengwu theimpactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT lili theimpactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT fuchuanhuang theimpactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT haibinhe theimpactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT weiguan impactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT songchunluo impactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT jiewu impactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT hualou impactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT leiwang impactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT fengwu impactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT lili impactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT fuchuanhuang impactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine AT haibinhe impactofdieselinjectionstrategyandincylindertemperatureonthecombustionandemissionsofammoniadieseldualfuelmarineengine |