Numerical Simulation of Marine Diesel Engine Combustion and Emissions Using Intake Air Humidification at the Different Injection Timing

Zhou, Tianjia; Geng, Peng; Lu, Xiuwei

doi:10.1080/00102202.2020.1871333

Cited by 2 publications

(1 citation statement)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, its NOx emissions increase simultaneously. Studies revealed that exhaust gas recirculation, nitrogen-enriched, or humidification can effectively reduce NOx emissions at the expense of the diesel engine's economy [22,23]. As a result, there appears to be a trade-off relationship between diesel engines' economy and NOx emissions [24,25].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Marine Two-Stroke Diesel Engine Based on Air Intake Composition and Temperature Control

Tan

et al. 2022

Atmosphere

View full text Add to dashboard Cite

The influence of gas intake temperature, composition and the volume concentration of each gas component on diesel engine combustion, emission and the output power was studied by building a calculation model of the B&W 6S35ME-B9 marine two-stroke low-speed diesel engine, followed by a comprehensive optimization exploration. The results showed that under 295 K and 18.5% O2 of intake gas, the engine’s NOx emission is only 4.5 g/kWh and reduced to 58% from the normal air gas intake condition. Moreover, their power output is very similar. In addition, the effect of CO2 or H2O added into the intake of the diesel engine on the performance of the diesel engine can be compensated by reducing the intake temperature. At the intake temperature of 295 K, the engine’s NOx emission with 20.58% O2, 77.42% N2 and 2% H2O is 8.62 g/kWh, and 9.06 g/kWh under 20.79% O2, 78.21% N2 and 2% CO2. It is lower than 11.77 g/kWh, which is under normal intake conditions (315 K, 21%O2 and 79%N2). The power output is also similar to the normal intake condition. Therefore, the comprehensive optimization of gas intake temperature, composition and concentration can effectively optimize the diesel engine’s performance in terms of combustion, emission and power output. The research results have an important reference value for the optimization of diesel engine performance.

show abstract