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首页> 外文期刊>Clean technologies and environmental policy >Performance, exhaust emission and combustion of ethanol-diesel-compressed natural gas dual-fuel compression-ignition engine: a trade-off study
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Performance, exhaust emission and combustion of ethanol-diesel-compressed natural gas dual-fuel compression-ignition engine: a trade-off study

机译：Performance, exhaust emission and combustion of ethanol-diesel-compressed natural gas dual-fuel compression-ignition engine: a trade-off study

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摘要

The present work investigates the effect of ethanol addition in pilot fuel on performance, combustion and emission of a partially modified dual-fuel compression-ignition engine under different compressed natural gas strategies. The ethanol is mixed in diesel with 5 and 10 (v/v) proportions, whereas natural gas was injected in the intake manifold at three different flowrates, i.e., 0.02 kg/ h, 0.2 kg/h and 0.22 kg/h. It is observed that brake thermal efficiency is increased by 22.57 with 0.02 kg/h gas flow rate at 1.4 bar BMEP. The emissions of oxides of nitrogen and carbon monoxide are also observed to be lower by 26.41 and 8.17 at the same condition, respectively. To this end, a multi-objective particle swarm optimization technique is utilized to obtain Pareto front of the optimal results. Further, a multi-attribute decision-making-based technique for order preference by similarity to ideal solution methodology is incorporated to find the optimal dual-fuel engine operating conditions. The optimization algorithm showed optimal operating conditions to be 4.17 bar brake mean effective pressure, 0.019 kg/h compressed natural gas share and 10 (v/v) ethanol share, where 33.43 brake thermal efficiency, 0.808 g/kWh of cumulated oxides of nitrogen and unburned hydrocarbon, 0.091 g/kWh of particulate matter and 0.969 g/kWh of carbon monoxide is attainable. Actual experiments conducted at the optimal operating conditions showed 0.20 lower brake thermal efficiency, 2.47 higher cumulated oxides of nitrogen and unburned hydrocarbon, 0.70 higher particulate matter and 15.49 lower carbon monoxide emission as compared to the optimized values.

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