The Effects of Diluent Admissions and Intake Temperature in Exhaust Gas Recirculation on the Emissions of an Indirect-Injection Dual Fuel Engine

Abd-Alla, G.H.; Soliman, Hatem; Abdrabbo, M. F.

doi:10.4271/2000-01-2796

Cited by 6 publications

(2 citation statements)

References 6 publications

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“…In general, EGR is a useful method for reducing NO x formed in the cylinder owing to the lowered combustion temperature resulting from the increased inert gas in the charge [4][5][6]8,9]. Thus it was expected that the combination of dual fuelling and EGR could considerably reduce both smoke and NO x , especially at higher loads.…”

Section: Exhaust Gas Recirculationmentioning

confidence: 99%

Reduction of emissions in an automotive direct injection diesel engine dual-fuelled with natural gas by using variable exhaust gas recirculation

Pirouzpanah

Sarai

2003

Proceedings of the Institution of Mechanical Engineers, Part D:

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An experimental study was conducted to determine the performance and exhaust emission characteristics of an automotive direct injection dual-fuelled diesel engine. Natural gas was used such that 65 per cent of engine brake power was supplied from compressed natural gas and the rest was supplied from diesel fuel. The objective of this work is to investigate the possibility of decreasing exhaust emission with the lowest performance sacri ce. At part loads, a dual-fuelled engine inevitably su ers from lower thermal e ciency and higher carbon monoxide (CO) emission. This is mainly due to leaner mixture and incomplete combustion, which is a consequence of the smaller amount of pilot fuel. To resolve these problems, the e ects of cooled exhaust gas recirculation (EGR) were investigated. The experimental results show that the application of EGR, at higher loads with 10 per cent EGR and at part loads with 15 per cent EGR, can considerably reduce NO x and other exhaust emissions such as unburned hydrocarbons, CO and soot. Results show that the performance parameters almost remain at the baseline engine level.

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Section: Exhaust Gas Recirculationmentioning

confidence: 99%

Reduction of emissions in an automotive direct injection diesel engine dual-fuelled with natural gas by using variable exhaust gas recirculation

Pirouzpanah

Sarai

2003

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Pirouzpanah and Kashani predicted the major pollutants in a direct injection dual fuel engine using a multi-zone model for pilot and two-zone model for gaseous fuel [4]. Abd-Alla et al investigated the effects of EGR by using a quasi-twozone model with chemical kinetics including 41 species and 178 reactions [5]. Papagiannakis and Hountalas studied the effects of pilot fuel quantity on combustion characteristics 2 Journal of Combustion in a dual fuel engine with a two-zone combustion model [6,7].…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation of Combustion and Knock in a Dual Fuel Gas/Diesel Compression Ignition Engine

Gharehghani

Mirsalim

Jazayeri

2012

Journal of Combustion

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Conventional compression ignition engines can easily be converted to a dual fuel mode of operation using natural gas as main fuel and diesel oil injection as pilot to initiate the combustion. At the same time, it is possible to increase the output power by increasing the diesel oil percentage. A detailed performance and combustion characteristic analysis of a heavy duty diesel engine has been studied in dual fuel mode of operation where natural gas is used as the main fuel and diesel oil as pilot. The influence of intake pressure and temperature on knock occurrence and the effects of initial swirl ratio on heat release rate, temperature-pressure and emission levels have been investigated in this study. It is shown that an increase in the initial swirl ratio lengthens the delay period for auto-ignition and extends the combustion period while it reduces NO x . There is an optimum value of the initial swirl ratio for a certain mixture intake temperature and pressure conditions that can achieve high thermal efficiency and low NO x emissions while decreases the tendency to knock. Simultaneous increase of intake pressure and initial swirl ratio could be the solution to power loss and knock in dual fuel engine.

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Effect of hot exhaust gas recirculation on the performance and emissions of an advanced injection low pilot-ignited natural gas engine

Srinivasan

Krishnan

et al. 2007

International Journal of Engine Research

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The development of the advanced injection low pilot-ignited natural gas (ALPING) combustion concept that employs very small diesel pilots (1–5 per cent by energy) to compression ignite a premixed natural gas-air mixture to achieve very low NOx (0.2 g/kWh) and high efficiencies (about 41 per cent) has been described in a previous work. However, at part loads the ALPING combustion mode suffers from higher HC emissions (mostly unburned methane) and poor engine stability. To resolve this problem, tests were carried out employing various levels of hot EGR (0–26 per cent) at different loads on a single-cylinder research engine at a constant speed of 1700 r/min. Experimental results compared with baseline ALPING mode (0 per cent EGR) for quarter load operation are presented in the current paper. The results show that, at 60° BTDC injection timing, the application of hot EGR reduced HC emissions by up to 70 per cent without any significant NOx emissions penalty. The fuel conversion efficiencies were improved by 8 percentage points, while COVi.m.e.p. and CO emissions decreased 20 percentage points and 40 per cent, respectively. To identify the upper limits of hot EGR substitution, engine knock tests, which were conducted to identify audible knock limits, are also presented for a representative case (half load). The progress made by this project better positions ALPING combustion as a potentially viable approach to meet the regulatory and economic challenges of the future.

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The Effects of Diluent Admissions and Intake Temperature in Exhaust Gas Recirculation on the Emissions of an Indirect-Injection Dual Fuel Engine

Cited by 6 publications

References 6 publications

Reduction of emissions in an automotive direct injection diesel engine dual-fuelled with natural gas by using variable exhaust gas recirculation

Reduction of emissions in an automotive direct injection diesel engine dual-fuelled with natural gas by using variable exhaust gas recirculation

Numerical and Experimental Investigation of Combustion and Knock in a Dual Fuel Gas/Diesel Compression Ignition Engine

Effect of hot exhaust gas recirculation on the performance and emissions of an advanced injection low pilot-ignited natural gas engine

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