scholarly journals NOx Reduction by Addition of Steam for Medium Size 4-Stroke Low Speed Maine Diesel Engine.

2001 ◽  
Vol 36 (3) ◽  
pp. 168-172
Author(s):  
Hiroaki Kimura ◽  
Satoru Goto ◽  
Takahisa Mimura ◽  
Katsuhisa Ikawa
Keyword(s):  
Diesel Engine ◽  
Nox Reduction ◽  
Medium Size ◽  
Low Speed

scholarly journals NOx Reduction of Marine Low Speed Diesel Engine with Low Pressure EGR

2017 ◽  
Vol 52 (4) ◽  
pp. 506-509
Author(s):  
Naohiro Hiraoka ◽  
Kazuhisa Ito ◽  
Takashi Ueda
Keyword(s):  
Diesel Engine ◽  
Nox Reduction ◽  
Low Pressure ◽  
Low Speed

scholarly journals NOx reduction test of Low Speed Diesel Engine

1998 ◽  
Vol 33 (5) ◽  
pp. 346-352
Author(s):  
Norio Takeuti ◽  
Katsutoshi Ishii ◽  
Mitugu Kimura ◽  
Katsushi Sasaki ◽  
Toshimitsu Maki ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Nox Reduction ◽  
Low Speed ◽  
Reduction Test

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

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

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

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

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

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.

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.

Water Addition in Diesel Engine Intake for NOx Reduction: Comparison of Modeling and Experiments

2003 ◽  
Author(s):  
Bhaskar Tamma ◽  
Juan Carlos Alvarez ◽  
Aaron J. Simon
Keyword(s):  
Diesel Engine ◽  
Fuel Efficiency ◽  
Nox Reduction ◽  
Engine Performance ◽  
Thermodynamic Cycle ◽  
Nox Emission ◽  
Water Addition ◽  
Predictive Tool ◽  
Fuel Flow ◽  
Influence Of Water

Reduction in emissions, especially NOx has been the main study of various engine researchers in the light of stringent emission norms. To reduce the time and cost involved in testing these technologies, engine thermodynamic cycle predictive tools are used. The present work uses one such predictive tool (GT Power from Gamma Technologies) for predicting the influence of water addition in a turbocharged 6-cylinder diesel engine intake on engine performance and NOx emissions. The experiments for comparison with modeling included the introduction of liquid water in the engine intake stream, between the compressor and intercooler ranging from 0 to 100% of fuel flow rate. NOx emission reduced linearly with water addition with reduction of 63% with less than 1% penalty on fuel efficiency at 100% water addition. The GT Power model predicted the performance within 5% of experimental data and NOx emission within 10% of the experiments.

Reliability Test of a Rule-Based SCR Control Strategy for Cleaner Heavy-Duty Diesel Engine using Biodiesel Blend

2013 ◽  
Vol 284-287 ◽  
pp. 903-907
Author(s):  
Chih Cheng Chou ◽  
Chia Jui Chiang ◽  
Yong Yuan Ku ◽  
Chih Chieh Chen
Keyword(s):  
Diesel Engine ◽  
Control Strategy ◽  
Nox Reduction ◽  
Rule Based ◽  
Heavy Duty Diesel Engine ◽  
Control Objective ◽  
Biodiesel Blend ◽  
The Mean ◽  
Heavy Duty Diesel ◽  
Mean Time

A rule-based SCR control strategy is developed for a 5% biodiesel fueled heavy-diesel engine. The control objective is to reduce the tail-pipe NOx emission while minimizing the urea dosage in a reliable fashion. A total of 32 runs of experimental test in ESC and ETC driving modes are conducted to demonstrate the performance and reliability of the rule-based control strategy. Average NOx reduction rates of 78.5% and 60% are achieved for the ESC and ETC tests respectively. In the mean time, the average urea dosage is 160 gram for the ESC tests and 0.49 % of the fuel consumption for the ETC tests. Variation of less than 7.78% and 12.05% for the ESC and ETC tests respectively demonstrate the reliability of the rule-based control strategy.

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