Utilising the Latest Findings on Low Speed 2-Stroke Diesel Engine Oil Stress from Field & Laboratory Engine Testing

Jerry Hammett

doi:10.5988/jime.49.293

Effect of Al2O3 and SiO2 Metal Oxide Nanoparticles Blended with POME on Combustion, Performance and Emissions Characteristics of a Diesel Engine

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.16.3.2019.03.0515 ◽

2019 ◽

Vol 16 (3) ◽

pp. 6859-6873 ◽

Cited By ~ 1

Author(s):

M. A. Adzmi ◽

A. Abdullah ◽

Z. Abdullah ◽

A. G. Mrwan

Keyword(s):

Diesel Engine ◽

Metal Oxide Nanoparticles ◽

Peak Torque ◽

Combustion Characteristic ◽

Maximum Pressure ◽

Single Cylinder ◽

Engine Testing ◽

Co Addition ◽

Carbon Dioxide Co2 ◽

Test Fuel

Evaluation of combustion characteristic, engine performances and exhaust emissions of nanoparticles blended in palm oil methyl ester (POME) was conducted in this experiment using a single-cylinder diesel engine. Nanoparticles used was aluminium oxide (Al2O3) and silicon dioxide (SiO2) with a portion of 50 ppm and 100 ppm. SiO2 and Al2O3 were blended in POME and labelled as PS50, PS100 and PA50, PA100, respectively. The data results for PS and PA fuel were compared to POME test fuel. Single cylinder diesel engine YANMAR TF120M attached with DEWESoft data acquisition module (DAQ) model SIRIUSi-HS was used in this experiment. Various engine loads of zero, 7 N.m, 14 Nm, 21 N.m and 28 N.m at a constant engine speed of 1800 rpm were applied during engine testing. Results for each fuel were obtained by calculating the average three times repetition of engine testing. Findings show that the highest maximum pressure of nanoparticles fuel increase by 16.3% compared to POME test fuel. Other than that, the engine peak torque and engine power show a significant increase by 43% and 44%, respectively, recorded during the PS50 fuel test. Meanwhile, emissions of nanoparticles fuel show a large decrease by 10% of oxide of nitrogen (NOx), 6.3% reduction of carbon dioxide (CO2) and a slight decrease of 0.02% on carbon monoxide (CO). Addition of nanoparticles in biodiesel show positive improvements when used in diesel engines and further details were discussed.

Download Full-text

CHARACTERISATION OF PARTICLES EMITTED BY A 14 MW LOW-SPEED DIESEL ENGINE

Journal of Aerosol Science ◽

10.1016/s0021-8502(21)00041-0 ◽

2001 ◽

Vol 32 ◽

pp. 77-78

Author(s):

J.J. RODRIGUEZ-MAROTO ◽

D. SANZ-RIVERA ◽

J.L. DORRONSORO ◽

F.J. GOMEZ-MORENO ◽

R. MUÑOZ-BUENO ◽

...

Keyword(s):

Diesel Engine ◽

Low Speed

Download Full-text

Introduction of ME-GI - Gas Burning Low-Speed Diesel Engine

Marine Engineering ◽

10.5988/jime.51.153 ◽

2016 ◽

Vol 51 (2) ◽

pp. 153-158

Author(s):

Takahira Tabuchi ◽

Takashi Fuchikami ◽

Kouichi Namba ◽

Yutaro Wada ◽

Yasuyuki Tsuji

Keyword(s):

Diesel Engine ◽

Low Speed

Download Full-text

Effects of multiple injections on combustion and emissions in a heavy-duty diesel engine at high load and low speed

Advances in Mechanical Engineering ◽

10.1177/1687814020984628 ◽

2020 ◽

Vol 12 (12) ◽

pp. 168781402098462

Author(s):

Yingying Lu ◽

Yize Liu

Keyword(s):

Diesel Engine ◽

Single Injection ◽

High Load ◽

Post Injection ◽

Heavy Duty ◽

Low Speed ◽

Multiple Injections ◽

Heavy Duty Diesel Engine ◽

Main Injection ◽

Heavy Duty Diesel

Advanced multiple injection strategies have been suggested for compression ignition engines in order to meet the increasingly stringent emission regulations. Experiments and simulations were used to study effects of the main-injection mode (times), the post-injection proportion, and timing on combustion and emissions in a heavy-duty diesel engine at high load and constant low speed. The results reveal the following. The NOx emissions of 1main+1post, 2main+1post, and 3main+1post injections are all lower than those of single injection; the higher the number of main-injection pluses, the lower the NOx emissions. Enough main-post injection interval is needed to ensure post and main injections are relatively independent to entrain more fresh air to decrease the soot. Over-retarded post-injection timing tends to increase the soot due to the lower in-cylinder temperature. The combined effects of formation and oxidation determine the final soot. To gain the best trade-off of NOx and soot, compared with single injection, for the three multiple injections, the lowest soot emissions are gained at post-injection proportions of 15% and post-injection timings of 25°, 30°, and 35° CA ATDC, with soot reductions of 26.7%, −34.5%, and −112.8%, and NOx reductions of 5.88%, 21.2%, and 40.3%, respectively, for 1main+1post, 2main+1post, and 3main+1post injections.

Download Full-text

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

International Journal of Engine Research ◽

10.1177/14680874211069217 ◽

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.

Download Full-text