doi: 10.52899/24141437_2025_04_553
UDK: 621.431.74

Design and Study of Performance of Marine Engine Exhaust Gas Recirculation Cooler by CFD Modeling on a Digital Platform

Черкаев Г. В., Чан Х. Б.
Article language:
Citation Link: Cherkaev GV, Tran ВН. Design and Study of Performance of Marine Engine Exhaust Gas Recirculation Cooler by CFD Modeling on a Digital Platform. Transactions of the Saint Petersburg State Marine Technical University. 2025;4(4):553–564. DOI: 10.52899/24141437_2025_04_553 EDN: SLBRSW

Annotation

BACKGROUND: The paper presents the design of a shell-and-tube recirculation gas cooler for marine diesel engines and analyzes its performance. The study is necessitated by the ever-stricter regulations on monitoring and reducing marine engine emissions. AIM: To improve the exhaust gas recirculation (EGR) system to reduce NOx emissions and increase the engine performance by improved cooler design. METHODS: We used Ansys Fluent software to simulate the flow and temperature distribution in the cooler to increase cooling efficiency and improve the system design. Process simulation showed that coolant flow rate and heat exchanger tube structure adjustment significantly improves cooling efficiency and reduces energy consumption. RESULTS: The study shows that at gas recirculation rates of 30% and 40%, the selected cooler design fully meets the recirculated gas cooling requirements and the minimum cooling temperature can be reduced to 133 ˚C. The analysis may be used in calculations to improve and increase the cooling efficiency of an existing cooler. CONCLUSION: The method used in the study may be applied to other marine diesel engines to improve fuel efficiency and reduce environmental impact. Keywords: exhaust gas recirculation (EGR); marine engine; cooler design; numerical modeling; Ansys Fluent; temperature distribution; emission reduction.

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