Exploration on the emissions and catalytic reactors interactions of a non-road diesel engine through experiment and system level simulation

Ruan, Feng; Hu, Xiulin; Li, Guanghua; Sun, Zhengwei; Ye, Ming; Deng, Banglin

doi:10.1016/j.fuel.2023.127746

Cited by 40 publications

(11 citation statements)

References 63 publications

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“…In recent years, resource depletion, the energy crisis, and ecological environment deterioration have become the main global problems [1,2]. The extensive use of fossil fuels and aggravated carbon dioxide emissions have caused the serious problem of global warming [3,4].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on the Energy Flow of Electric Vehicle Batteries among Different Environmental Temperatures

Zhao

et al. 2023

Energies

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In the present research, the energy flow of electric vehicle batteries under different environmental temperatures was experimentally examined in a climate chamber. The energy flow characteristics, energy loss conditions, and the critical components’ operating conditions and working efficiency under different environmental temperatures were comparatively analyzed. The test results show that the environmental temperature has a profound impact on an electric vehicle’s performance and the critical components’ working conditions. The driving mileage of the tested vehicle at −7 °C, 23 °C, and 35 °C was found to be 162.89 km, 256.09 km, and 198.69 km, respectively. The environmental temperature does not have much effect on the loss of the motor and motor control unit under driving conditions, and the proportion of those at different temperatures is in all cases about 18%. The battery-recycled energy at 23 °C under braking conditions is much higher than that at −7 °C and 35 °C, leading to a longer driving range. The power battery pack thermal transfer loss at −7 °C is much greater than that at 23 °C and 35 °C due to the low charging and discharging efficiency and the high energy consumption required to warm up the battery at a low environmental temperature. The compressor energy consumption accounts for a large proportion in both braking and driving conditions at 35 °C, and the proportions are 15.25% and 12.41%, respectively. The battery state-of-charge drops the fastest at −7 °C, followed by 35 °C, due to the differences in the power demands of air conditioning, warm air positive temperature coefficient (PTC), and battery PTC in high- and low-temperature environments. The working condition of the front motor under driving conditions at 35 °C is the most severe and leads to the lowest working efficiency.

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Section: Introductionmentioning

confidence: 99%

A Comparative Study on the Energy Flow of Electric Vehicle Batteries among Different Environmental Temperatures

Zhao

et al. 2023

Energies

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“…Thermoacoustic instability (TI) in combustion systems has remained a challenging problem for industry for decades, since it can lead to excessive heat transfer loss, and can release the resonant oscillation pressure wave onto the combustors’ wall or jet panel of the engine, resulting in frequent loss of thermal integrity and structural integrity. 1,2 It usually caused by a non-linear interaction between non-stationary heat release and pressure fluctuations. 3 This interaction can cause large-amplitude periodic pressure oscillations, resulting in combustion problems 4 or even severe engine damage.…”

Section: Introductionmentioning

confidence: 99%

Analysis of separating acoustics from the thermoacoustic system of methane combustion based on Reynolds-averaged Navier-Stokes and linearized Navier-Stokes equations

Shen

Liu

2023

Journal of Low Frequency Noise, Vibration and Active Control

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A model coupling Reynolds-averaged Navier-Stokes (RANS) method and linearized Navier-Stokes equations (LNSEs) was established in order to investigate the acoustic excitation and attenuation effect from a coupling perspective of time–space–frequency under various flow velocities and mass fractions of methane. Results show that the energy distribution of acoustic modes under high-frequency acoustic excitation is more uniform. The amplitude of the acoustic oscillation at a multiple coupling physical field is 10,000 times higher than that at simple flow field. The case when [Formula: see text] = 0.8 owns the largest percentage of energy conversion from fundamental to high-frequency signals, the largest percentage of transmitted waves from the combustion chamber system to outside and the strongest non-linear effect. When [Formula: see text] rises, the amplitude of oscillations at points and the attenuation effect of high-frequency signals along the axial are enhanced. At the case of Uin = 15 m/s, the amplitude of harmonics is reduced by 18% compared with other cases, while the proportion of the high-frequency harmonic increases, proving the non-linearity cannot be neglected in this case. As velocity rises, the energy conversion from fundamental to high-frequency signals enhances; while closer to the outlet position, the more complex the oscillation signal is. Model-shapes analysis shows that a case of [Formula: see text] = 0.8 owns the largest amplitude of the second harmonic at downstream of the burner, while the amplitude of the harmonics rapidly increases at Uin = 15 m/s at the end of the burner, which further indicates that the energy conversion of low-frequency signals to high-frequency signals occurs mainly in the middle and downstream regions.

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“…Driven by energy crisis and global environment deterioration, scientists and scholars are urgently to find clean alternative fuel 1,2 . All industries are working to reduce energy consumption and environmental pollution wherever possible, and the automotive industry is no exception 3,4 .…”

Section: Introductionmentioning

confidence: 99%

“…Driven by energy crisis and global environment deterioration, scientists and scholars are urgently to find clean alternative fuel. 1,2 All industries are working to reduce energy consumption and environmental pollution wherever possible, and the automotive industry is no exception. 3,4 Thanks to the advantages of the lower carbon (due to the high ratio of hydrogen to carbon), NO x (due to lower combustion adiabatic temperature), and soot emissions and the abundant storage over the whole world, natural gas (NG) is regarded as the most promising sustainable energy and is widely utilized in automobile engines, gas turbines industries, and other energy needs.…”

Section: Introductionmentioning

confidence: 99%

Chemical kinetic analysis on the auto‐ignition characteristics of natural gas–diesel dual‐fuel combustion under engine‐relevant conditions

Liu

Wang

Xie

et al. 2023

Int J of Chemical Kinetics

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With the advent of energy crisis and stringent emission regulations, natural gas (NG)/diesel dual‐fuel engines have entered the popular view. In this paper, the accurate boundary conditions are determined by the Converge model and the transient parameters were introduced into the chemical kinetics model to make the operating conditions more closely match the actual engine operating conditions. The effects of different methane/n‐heptane ratios, initial temperatures, initial pressures, and equivalence ratios on the IDT of methane/n‐heptane fuel mixtures were analyzed using comprehensive chemical kinetic tools such as mole fraction analysis, ROP analysis, and sensitivity analysis. The IDT of methane/n‐heptane mixture decreased significantly with increasing the equivalence ratio, initial pressure, and the proportion of n‐heptane in the mixture, but the change of temperature was more complicated for the IDT. The NTC behavior of methane/n‐heptane mixture was also affected by the NTC behavior of n‐heptane. With the increase of initial temperature, the consumption of methane and n‐heptane appeared to be significantly accelerated. The peak of radicals and intermediate groups appeared earliest and had the highest radical concentration when the n‐heptane content was 30%. With the increase of initial pressure, the peak moments of the six radicals were further advanced, but the mole concentrations of O, OH, H radicals decreased significantly. This paper not only provides a reference for the design of NG/diesel dual‐fuel engines, but also provides a theoretical basis and data support for improving the ignition and initial condition setting strategies of the engines.

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Exploration on the emissions and catalytic reactors interactions of a non-road diesel engine through experiment and system level simulation

Cited by 40 publications

References 63 publications

A Comparative Study on the Energy Flow of Electric Vehicle Batteries among Different Environmental Temperatures

A Comparative Study on the Energy Flow of Electric Vehicle Batteries among Different Environmental Temperatures

Analysis of separating acoustics from the thermoacoustic system of methane combustion based on Reynolds-averaged Navier-Stokes and linearized Navier-Stokes equations

Chemical kinetic analysis on the auto‐ignition characteristics of natural gas–diesel dual‐fuel combustion under engine‐relevant conditions

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