Instantaneous Speed Variation of Crankshaft on a Low Speed Marine Diesel Engine

2007 ◽  
Vol 31 (2) ◽  
pp. 138-144 ◽  
Author(s):  
Jae-Sung Choi ◽  
Jin-Uk Lee ◽  
Sang-Dug Lee ◽  
Kwon-Hae Cho
Keyword(s):  
Diesel Engine ◽  
Marine Diesel Engine ◽  
Low Speed ◽  
Speed Variation ◽  
Marine Diesel ◽  
Instantaneous Speed

Modeling and performance analysis of diesel engine considering the heating effect of blow-by on cylinder intake gas

2021 ◽  
pp. 146808742110692
Author(s):  
Zhenyu Shen ◽  
Yanjun Li ◽  
Nan Xu ◽  
Baozhi Sun ◽  
Yunpeng Fu ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Marine Diesel Engine ◽  
Heating Effect ◽  
Shipping Industry ◽  
Low Speed ◽  
Proposed Model ◽  
International Regulations ◽  
Marine Diesel ◽  
And Performance

Recently, the stringent international regulations on ship energy efficiency and NOx emissions from ocean-going ships make energy conservation and emission reduction be the theme of the shipping industry. Due to its fuel economy and reliability, most large commercial vessels are propelled by a low-speed two-stroke marine diesel engine, which consumes most of the fuel in the ship. In the present work, a zero-dimensional model is developed, which considers the blow-by, exhaust gas bypass, gas exchange, turbocharger, and heat transfer. Meanwhile, the model is improved by considering the heating effect of the blow-by gas on the intake gas. The proposed model is applied to a MAN B&W low-speed two-stroke marine diesel engine and validated with the engine shop test data. The simulation results are in good agreement with the experimental results. The accuracy of the model is greatly improved after considering the heating effect of blow-by gas. The model accuracy of most parameters has been improved from within 5% to within 2%, by considering the heating effect of blow-by gas. Finally, the influence of blow-by area change on engine performance is analyzed with considering and without considering the heating effect of blow-by.

K-2020 Measurement of N_2O Emission from Low-speed Marine Diesel Engine

2001 ◽  
Vol II.01.1 (0) ◽  
pp. 527-528
Author(s):  
Tatsuro TSUKAMOTO ◽  
Yasuharu NAKAJIMA ◽  
Kenji OHE ◽  
Hiroshi OKADA
Keyword(s):  
Diesel Engine ◽  
Marine Diesel Engine ◽  
Low Speed ◽  
Marine Diesel

Experimental and numerical study on the characteristics of a penetrating exhaust manifold for low-speed two-stroke marine diesel engine

Energy ◽  
2021 ◽  
pp. 121550
Author(s):  
Yingyuan Wang ◽  
Jie Gu ◽  
Mingyang Yang ◽  
Kun Zhang ◽  
Kangyao Deng ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Numerical Study ◽  
Marine Diesel Engine ◽  
Exhaust Manifold ◽  
Low Speed ◽  
Marine Diesel
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