Effects of vortex tube on exhaust emissions during cold start of diesel engines

Çelik, Adem; Yılmaz, Mehmet; Yildiz, Omer F.

doi:10.1016/j.jaecs.2021.100027

Cited by 10 publications

(8 citation statements)

References 47 publications

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“…Periodical regeneration of a DPF is required to remove accumulated DPM and reduce the excessive backpressure [10]. The exhaust gas temperature of a diesel engine is generally between 100 °C and 400 °C, insufficient to burn DPM completely [11,12]. Thus, regeneration of DPFs by heating the accumulated DPM to above 600 °C is used to enhance DPM combustion, but this thermal combustion regeneration also has a fuel penalty.…”

Section: Introductionmentioning

confidence: 99%

Efficient simultaneous removal of diesel particulate matter and hydrocarbons from diesel exhaust gas at low temperatures over Cu–CeO₂/Al₂O₃ coupling with dielectric barrier discharge plasma

REN 任,

FANG 方,

ZHANG 张

et al. 2024

Plasma Sci. Technol.

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Diesel particulate matter (DPM) and hydrocarbons (HC) emitted from diesel engines negatively affect air quality and human health. Catalysts for oxidative removals of DPM and HC are currently used universally but the low removal efficiency at low temperatures is a problem. In this study, Cu-doped CeO2 loaded on Al2O3 coupled with plasma was used to enhance DPM and HC low-temperature oxidation. DPM and HC removals at 200 °C using the catalyst were as high as 90% with plasma, while below 30% without plasma. Operando plasma DRIFTS-MS was conducted to reveal the function mechanism of the oxygen species on DPM oxidation process. It was found that Cu-CeO2 can promote the formation of adsorbed oxygen (M+-O2 − ) and terminal oxygen (M=O), which can react with DPM to form carbonates that are easily converted to gaseous CO2. Our results provide a practical plasma catalysis technology to obtain simultaneous removals of DPM and HC at low temperatures.

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Section: Introductionmentioning

confidence: 99%

Efficient simultaneous removal of diesel particulate matter and hydrocarbons from diesel exhaust gas at low temperatures over Cu–CeO₂/Al₂O₃ coupling with dielectric barrier discharge plasma

REN 任,

FANG 方,

ZHANG 张

et al. 2024

Plasma Sci. Technol.

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“…They achieved a decrease of 8.3°C in the inlet temperature of the compressor indicating that the energy saving of the compressor was 2.3%. Celik et al 9,10 investigated an experimental setup that includes a VT with a diesel engine. In Reference 9, they used VT to increase the air temperature entering the cylinders to improve the cold start characteristics of the engine.…”

Section: Introductionmentioning

confidence: 99%

“…The increase in the inlet temperatures reached up to 3.5°C depending on the ambient air temperature. In Reference 10, they studied the effect of VT on emissions during the cold start period. They found that carbon monoxide (CO) and particulate matter (PM) emissions decreased, but hydrocarbons (HC) and oxides of nitrogen (NOx) emissions increased with using VT. Fotso et al 11 presented a thermal analysis of solar thermoelectric generators (STEG) equipped with a VT installed on a hybrid vehicle.…”

Section: Introductionmentioning

confidence: 99%

A novel hybrid cooling system combining vortex tube with absorption cooler

Mugdadi

Al‐Nimr

2022

Intl J of Energy Research

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In this study, a novel cooling system that combines a vortex tube with an absorption cooler is presented. The system produces cooling effects from both devices. The compressed air enters the vortex tube to produce a cooling effect, and the hot air escaped from the vortex tube is used to drive the absorption cooler. The theoretical model has been built and employed to study the performance of the hybrid cooling system, in terms of the specific cooling load and the coefficient of performance, under the effect of different parameters (feed air pressure, feed air temperature, and cold/hot mass fractions). Further, the hybrid system performance is compared to the performance of the vortex tube alone. The results showed that the cooling capacity of the system increases with an increase of both the feed air temperature and the feed air pressure. The maximum coefficient of performance of the system under current design points is 29.3% greater than the maximum coefficient of performance of the standalone vortex tube.

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“…Diesel engines show poor cold start performance at low temperatures, for instance, high emissions, high fuel consumption and long cranking time [1]. Various methods were investigated to improve the engine performance, including pilot injection [2,3], fuel optimization [4][5][6][7][8][9], thermal barrier coating [10] and intake air preheating [11]. However, diesel engines still face great challenges.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Preheating Strategy on the Combustion Process of the Intake Manifold Burner

Wang

2022

Applied Sciences

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The intake air preheating is an effective method to improve the cold start performance of diesel engines. The combustion process and ignition probability were investigated in the present study. The average flame area (AFA) during the steady stage of the combustion process was used to evaluate the effects of various factors on combustion. The increase of voltage was found to enhance the combustion process, while the increased diesel flow rate first promoted the combustion before deteriorating it. The increased intake air flow velocity enhanced the combustion within 2.64 m/s, and excessive air flow velocity hindered the combustion from 2.7 to 3 m/s. The cross-distributed vortex clusters in the combustion chamber, periodic diesel evaporation and vortexes with opposite rotation directions in the vicinity of the intake manifold burner were believed to be the main reasons for flame stripping and swirl motion. The temperature rise in the exhaust pipe was recorded to investigate the thermal distribution. The warm air was concentrated in the upper region because of the buoyancy effect of the flame. With the air flow velocity increasing from 1.4 to 10 m/s, the average temperature rise increased first before decreasing, while the combustion efficiency increased due to the increased air flow volume.

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Effects of vortex tube on exhaust emissions during cold start of diesel engines

Cited by 10 publications

References 47 publications

Efficient simultaneous removal of diesel particulate matter and hydrocarbons from diesel exhaust gas at low temperatures over Cu–CeO₂/Al₂O₃ coupling with dielectric barrier discharge plasma

Efficient simultaneous removal of diesel particulate matter and hydrocarbons from diesel exhaust gas at low temperatures over Cu–CeO₂/Al₂O₃ coupling with dielectric barrier discharge plasma

A novel hybrid cooling system combining vortex tube with absorption cooler

Effect of the Preheating Strategy on the Combustion Process of the Intake Manifold Burner

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Effects of vortex tube on exhaust emissions during cold start of diesel engines

Cited by 10 publications

References 47 publications

Efficient simultaneous removal of diesel particulate matter and hydrocarbons from diesel exhaust gas at low temperatures over Cu–CeO2/Al2O3 coupling with dielectric barrier discharge plasma

Efficient simultaneous removal of diesel particulate matter and hydrocarbons from diesel exhaust gas at low temperatures over Cu–CeO2/Al2O3 coupling with dielectric barrier discharge plasma

A novel hybrid cooling system combining vortex tube with absorption cooler

Effect of the Preheating Strategy on the Combustion Process of the Intake Manifold Burner

Contact Info

Product

Resources

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Efficient simultaneous removal of diesel particulate matter and hydrocarbons from diesel exhaust gas at low temperatures over Cu–CeO₂/Al₂O₃ coupling with dielectric barrier discharge plasma

Efficient simultaneous removal of diesel particulate matter and hydrocarbons from diesel exhaust gas at low temperatures over Cu–CeO₂/Al₂O₃ coupling with dielectric barrier discharge plasma