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논문 기본 정보

자료유형
학술저널
저자정보
Hyun-Min Baek (R.O.K Navy Headquarters) Jin-Uk Lee (Korea Maritime & Ocean University) Ji-Woong Lee (Korea Maritime and Ocean University)
저널정보
한국마린엔지니어링학회 Journal of Advanced Marine Engineering and Technology (JAMET) 한국마린엔지니어링학회지 제45권 제3호
발행연도
2021.6
수록면
100 - 107 (8page)
DOI
10.5916/jamet.2021.45.3.100

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초록· 키워드

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A diesel engine has the same length as the compression and expansion strokes, but a Miller cycle was introduced that achieved a higher expansion than the compression cycle by operating the changing intake valve. The Miller cycle is a low-compression and high-expansion cycle, so it can achieve high efficiency and NOx reduction effect. However, high-efficiency turbochargers must be adopted simultaneously owing to the reduction of the exhaust energy entering the turbines. This study theoretically reviewed the possibility of applying high expansion cycles and 2-stage T/C to 2-stroke marine diesel engines and considered their effects. The highest pressure ratio that can be achieved in 2-stage T/C system can be obtained when the pressure distribution between the low-and high-pressure stages is the same. A low compression – high expansion cycle was applied to reduce the maximum combustion temperature by more than 200 K, and the 2-stage T/C was simultaneously applied to increase the scavenge air pressure by approximately 4 bar and Pmax by approximately 30 bar. The theoretical review confirmed that the application of the 2-stage T/C and the effect of low compression – high expansion, which is the Miller cycle, can be achieved for a marine 2-stroke engine.

목차

Abstract
1. Introduction
2. 2-Stage Turbo Charging
3. Results
4. Discussion
5. Conclusion
References

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