A comparative study on operating range and combustion characteristics of methanol/diesel dual direct injection engine with different methanol injection timings

Yin, Xiangkun; Li, Wang; Duan, Hao; Duan, Qimeng; Kou, Hailiang; Wang, Ying; Yang, Bo; Zeng, Ke

doi:10.1016/j.fuel.2022.126646

Cited by 25 publications

(3 citation statements)

References 47 publications

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“…Compared with pure diesel mode, methanol direct injection during the compression stroke (DI_L) had no obvious advantages in reducing HC and CO emissions, but reduced CO2. Yin et al (2023a) evaluated the combustion characteristics of a dual-fuel methanol engine under various injection strategies. Methanol injection at -60 °CA after top dead center (ATDC) can reduce CO and HC emissions when the load and methanol energy substitution ratio (ESR) were high.…”

Section: Introductionmentioning

confidence: 99%

Effects of pilot injector specifications on combustion and emissions of diesel-methanol dual-fuel direct injection engine

LV,

WEI,

SONG

et al. 2024

JTST

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Diesel-ignited methanol direct injection engine can achieve high methanol substitution rate and low emissions. The effects of pilot diesel injector specifications, including hole number and installation location, on the combustion and emissions of a diesel-methanol dual-fuel direct injection engine were investigated in this study. The results show that increasing the number of diesel injection holes reduces the proportion of methanol premixed combustion, which is beneficial to reducing ringing intensity (RI) and reducing pollutant emissions. Different pilot injector types and installation positions have a significant impact on the combustion mode of methanol, but have little impact on fuel economy. The equivalent indicated specific fuel consumption (EISFC) is below 165g/kWh in all cases. When the diesel ignition area deviates from the center of the cylinder, methanol mainly undergoes premixed combustion, and NO X , HC, and CO emissions increase significantly. When the diesel combustion area is located in the center of the cylinder, methanol mainly undergoes diffusion combustion, with lower RI and less pollutant emissions.

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Section: Introductionmentioning

confidence: 99%

Effects of pilot injector specifications on combustion and emissions of diesel-methanol dual-fuel direct injection engine

LV,

WEI,

SONG

et al. 2024

JTST

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“…Direct injection methanol-diesel engine is to inject both methanol and diesel directly into a cylinder. Two separate nozzles are used to inject methanol and diesel, with diesel generally injected before the TDC, while there are a number of methanol injection strategies [13][14][15]. However, the combustion and emission characteristics as well as the operational stability of marine diesel/methanol dual-fuel engines under different operating loads are seriously affected by misfire and knocking [16].…”

Section: Introductionmentioning

confidence: 99%

“…Yin et al [13] investigated the effects of methanol direct injection strategies on engine performance. The results show that injection of methanol during the compression stroke could result in a large incylinder fuel concentration gradient, thus reducing the combustion duration.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on the Performance of Marine Diesel Engines Running on Diesel/Methanol and Diesel/Natural Gas Mode

Yao,

Ding,

Ben

et al. 2023

Moses

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With the increasingly stringent requirements of international decarbonization regulations, the shipping industry has accelerated the pace of exploiting low-carbon fuels. Methanol is one of the most prospective substitute fuels featured with low-carbon content, clean combustion and easy storage. For marine diesel/methanol dual-fuel engine applications, a certain quantity of diesel is typically used to ensure a stable ignition and combustion. However, the combustion and emission characteristics as well as the stable operation window of marine diesel/methanol dual-fuel engines under different operating loads have not yet been well investigated. In this study, a marine diesel/natural gas dual-fuel engine was used as a prototype to develop a 3D simulation model using CONVERGE, which was then validated using experimental data under different operating loads. The validated model was then employed to investigate the effects of methanol substitution rate (MSR) on the combustion and emission characteristics under the diesel/methanol operation mode. By monitoring the abnormal combustion phenomena such as misfire and knocking, the maximum MSR under different operating conditions was identified. Finally, the engine performances of diesel/natural gas and diesel/methanol modes were compared in terms of combustion and emission characteristics. The results show that the maximum MSR tends to increase first (from 5% to 43% under operation load from 25% to 75%) and then decrease (from 43% to 20% under operation load from 75% to 100%) with increasing operating load owing to the misfire limitation at low load and knocking limitation at high load, respectively. Comparing to the prototype diesel/natural gas mode, the diesel/methanol mode exhibited a shorter combustion duration with increased NOx emissions. The results obtained from this study are expected to guide the operation management of marine diesel/methanol dual fuel engines, and thus help reduce ships’ CO2 emissions.

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Predict the characteristics of the DI engine with various injection timings by Glycine max oil biofuel using artificial neural networks

Rajak,

Panchal,

Dasore

et al. 2024

Environ Sci Pollut Res

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A comparative study on operating range and combustion characteristics of methanol/diesel dual direct injection engine with different methanol injection timings

Cited by 25 publications

References 47 publications

Effects of pilot injector specifications on combustion and emissions of diesel-methanol dual-fuel direct injection engine

Effects of pilot injector specifications on combustion and emissions of diesel-methanol dual-fuel direct injection engine

Comparative Study on the Performance of Marine Diesel Engines Running on Diesel/Methanol and Diesel/Natural Gas Mode

Predict the characteristics of the DI engine with various injection timings by Glycine max oil biofuel using artificial neural networks

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