Biodiesel engine performance and emissions in low temperature combustion

Zheng, Ming; Mulenga, Mwila C.; Reader, Graham T.; Wang, Meiping; Ting, David S.‐K.; Tjong, Jimi

doi:10.1016/j.fuel.2007.05.039

Cited by 268 publications

(104 citation statements)

References 22 publications

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“…Concurrently, the EGR increases the specific heat capacity of the working fluid thereby reducing the flame temperatures. Furthermore, the endothermic dissociation of the EGR constituents such as H 2 O may contribute to the reduction in the flame temperatures [15]. Therefore, as the EGR is increased, the NO x emissions relatively decreased as seen in this figure.…”

Section: Resultsmentioning

confidence: 74%

Effects of High EGR Rate on Dimethyl Ether (DME) Combustion and Pollutant Emission Characteristics in a Direct Injection Diesel Engine

2013

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This study investigated the effects of high exhaust gas recirculation (EGR) rates on dimethyl ether (DME) fuel combustion performance, exhaust emissions and particle emission characteristics in a small direct injection diesel engine under various injection timings. To examine the effect of EGR and injection timings, the experiment was performed under high EGR rates (0%, 30%, 50%) and injection timings were varied from 40° before top dead center (BTDC) to top dead center (TDC) of the crank angle to examine the effects of early injection of DME fuel. The combustion pressures and heat release rates for different EGR rates followed similar trends. As the injection timing was advanced, the indicated mean effective pressure (IMEP) differed little in response to EGR rate in the range from TDC to 25° BTDC, and more for crank angles beyond 25° BTDC. DME combustion exhibited very little soot emission, but soot emission increased slightly with EGR rate. The use of high EGR during combustion produced very low NO x concentrations but increased HC and CO emissions for advanced injection timings from 25° BTDC to 40° BTDC. The use of EGR increased both the emissions of total particle number and particle volume over the whole range of the injection timings; for all cases, total particle volume decreased as injection timing was advanced. OPEN ACCESSEnergies 2013, 6 5158

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Section: Resultsmentioning

confidence: 74%

Effects of High EGR Rate on Dimethyl Ether (DME) Combustion and Pollutant Emission Characteristics in a Direct Injection Diesel Engine

2013

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“…The process continues until all fuel is burned out and is usually divided into the ignition delay period, the pre-mixed combustion period, the diffusion combustion period and the post combustion period. The proportion of premixed combustion is determined by the amount of mixed gas prepared during the ignition delay period [11]. In order to reflect the effect of intake dilution on the ignition delay in high EGR rate, this paper chooses (7) to calculate the period of ignition delay [12].…”

Section: Combustion Processmentioning

confidence: 99%

“…According to the energy conservation equation, the gas temperature of the burned and unburned zones is calculated separately, as shown in (10) and (11). …”

Section: Advances In Intelligent Systems Research Volume 134mentioning

confidence: 99%

Control -Oriented Modeling and Experimental Study on Low Temperature Combustion for Diesel Engine

Fei

Zhang²,

Dong

et al. 2017

Proceedings of the 2017 2nd International Conference on Control, Automation and Artificial Intelligence (CAAI 2017)

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Abstract-Diesel low-temperature combustion (LTC) has great potential on ultra-low emissions for internal combustion engine and has been widely researched in recent years. In order to enhance the stability of diesel LTC and improve the transient performance during low temperature combustion and conventional combustion mode switching, accurate prediction of the in-cylinder combustion state in diesel engine is required, and the control strategy should be adjusted accordingly. A controloriented combustion model which consists of the dynamic model of the intake, compression, combustion, expansion and exhaust process of diesel LTC is developed basing on in-cylinder thermodynamic cycle. The model was verified and validated with experimental data. Comparison between the calculation result and the experimental data shows that in LTC combustion mode, the maximum calculation error of indicated mean effective pressure (IMEP) is -5.4%, and the maximum calculation error of crank angle for 50% burnt fuel (CA50) is 6.6%. The results prove that the state parameters of diesel engine could be predicted accurately with this model, which is fundamental for model-based control of diesel low temperature combustion.

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“…Biodiesel is known as a carbon neutral fuel because the carbon present in the exhaust was originally fixed from the atmosphere. In comparison with conventional diesel fuels, the fuel-borne oxygen in biodiesel may promote more complete combustion and thus reduce particulate matter (PM), carbon monoxide (CO) and total hydrocarbons (THC) in compression-ignition engines, while slightly increase nitrogen oxides (NO x ) (Zheng et al 2008). According to a review on emission data for heavyduty engines published by EPA (Environmental Protection Agency of USA 2002), from diesel to B20 (20 % biodiesel and 80 % diesel by volume), CO, HC and PM decreased by 13, 20 and 20 % respectively (Lapuerta et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of Diesel engines fueled by biodiesel blends via thermodynamic simulation of an air-standard Diesel cycle

Jeshvaghani

Fallahipanah

Gahruei

et al. 2013

Int. J. Environ. Sci. Technol.

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Because of environmental problems, it becomes necessary to develop alternative fuels that give engine performance at par with diesel. Among the alternative fuels, biodiesel and its blends hold good promises as an eco-friendly and the most promising alternative fuel for Diesel engine. The properties of biodiesel and its blends are found similar to that of diesel. Many researchers have experimentally evaluated the performance characteristics of conventional Diesel engines fueled by biodiesel and its blends. However, experiments require enormous effort, money and time. Hence, via finite-time thermodynamics simulation, an air-standard Diesel cycle model with heat transfer loss and variable specific heats of working fluid is analyzed to predict the performance of Diesel engine. The effect of compression ratio, cut-off ratio and fuel type on output work and thermal efficiency is investigated through the model. The fuels considered for the analysis are conventional diesel, rapeseed oil biodiesel and its blend (20 % biodiesel and 80 % diesel by volume). Numerical simulations showed that the output work and thermal efficiency of the engine decrease with increase of cut-off ratio for all fuels. Also, the model predicts similar performance with diesel and biodiesel blend which means that the biodiesel blend (20 % biodiesel and 80 % diesel by volume) could be a good alternative and eco-friendly fuel for conventional Diesel engines without any need to modify the engine.

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Biodiesel engine performance and emissions in low temperature combustion

Cited by 268 publications

References 22 publications

Effects of High EGR Rate on Dimethyl Ether (DME) Combustion and Pollutant Emission Characteristics in a Direct Injection Diesel Engine

Effects of High EGR Rate on Dimethyl Ether (DME) Combustion and Pollutant Emission Characteristics in a Direct Injection Diesel Engine

Control -Oriented Modeling and Experimental Study on Low Temperature Combustion for Diesel Engine

Performance analysis of Diesel engines fueled by biodiesel blends via thermodynamic simulation of an air-standard Diesel cycle

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