scholarly journals Present State and Issue of Environmental Protection from Low Speed Marine Diesel Engine

2010 ◽  
Vol 45 (1) ◽  
pp. 6-11
Author(s):  
Jun Yanagi
Keyword(s):  
Diesel Engine ◽  
Environmental Protection ◽  
Present State ◽  
Marine Diesel Engine ◽  
Low Speed ◽  
Marine Diesel

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

Research on the Semi-Physical Simulation Technology of High Pressure Common Rail Electronic Control System for Low-Speed Marine Diesel Engine

2013 ◽  
Vol 470 ◽  
pp. 226-231
Author(s):  
Qin Peng Wang ◽  
Jian Guo Yang ◽  
Yong Hua Yu
Keyword(s):  
Control System ◽  
Diesel Engine ◽  
Test Bench ◽  
Physical Simulation ◽  
Marine Diesel Engine ◽  
Electronic Control ◽  
Simulation Technology ◽  
Low Speed ◽  
Electronic Control System ◽  
Marine Diesel

In this paper, the semi-physical simulation technology is introduced with the design and implementation of a semi-physical simulation test bench. A certain low-speed marine diesel engine of high pressure common rail (HPCR) electronic control system is taken as the subject of the test bench. In order to retain the functional and structural features of the HPCR electronic control system, the essential components are in consistent with the target engine, and some auxiliary parts are simplified and reformed. Specially, a real-time simulation model is built based on the principles of Mean Value Engine Model and cylinder moving method, which captures the requirements of ECU, such as the crank angle, the exhaust valve stroke signal, the scavenging pressure and so on. Therefore a closed-loop control system is accomplished including a real-time controller deployed in the simulation model, ECU and the executing agency of HPCR system. Additionally a monitoring management system is developed for the test bench with the functions of acquiring signals, monitoring parameters, storing data, alarming and etc. Finally, some tests are finished in the test bench and through analyzing the experimental results, the test bench can perform the characteristics and functions of the HPCR electronic control system. The semi-physical simulation technology can be used for the functional verification and performance test of HPCR electronic control system for the low-speed marine diesel engine.

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