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   Comparison of the Effects of Hydrogen and Hydroxygen Additions and Oxygen Enrichment on the Emission Characteristics of Ef7 Engine  
نویسنده Rahimi Reza ,Shirneshan Alireza
منبع Journal Of Renewable Energy And Environment - 2019 - دوره : 6 - شماره : 1 - صفحه:29 -35
چکیده    In this study, the effects of hydrogen and hydroxygen additions and oxygen enrichment on the emission characteristics of a gasoline engine (ef7) were investigated and compared with each other. the simulation was launched by gtpower at different engine speeds with 5 % to 15 % volume fractions for both of oxygen and hydrogen enrichment and 4.5 % to 9 % volume fractions of hydroxygen addition in the intake gas, respectively. in addition, the model was validated by experimental data. the results showed that co emission decreased from 11 % to 28 % in the hydrogenenrichment condition. moreover, carbon monoxide production was reduced from 28 % to 42 % for hydroxygen addition, and this pollutant emission experienced a reduction of 51 % to 67 % for oxygen enrichment. according to the results, hc emission decreased up to 13% in the hydrogenenriched air condition, and it was reduced from 30 % to 43 % during hydroxygen addition. in addition, hc emission experienced maximum reduction of 47 % to 68 % during oxygen addition. on the other hand, there was an opposite trend for nox emission. it was observed that nox emission increased by around 40 % and 75 % for hydrogen and hydroxygen enrichment, respectively. moreover, nitrogen oxides enhanced 2 to 5 times during oxygen enrichment, compared to that in the normal condition of the engine. results showed that 15 % oxygen enrichment and 9 % hydroxygen enrichment had significant effect on the reduction of hc and co emissions, and oxygen enrichment had greater effect on the rise of nox emissions than hydrogen and hydroxygen additions.
کلیدواژه Hydrogen ,Hydroxygen ,Modeling ,Emission ,Enrichment
آدرس Islamic Azad University, Najafabad Branch, Department Of Mechanical Engineering, Iran, Islamic Azad University, Najafabad Branch, Aerospace And Energy Conversion Research Center, Department Of Mechanical Engineering, Iran
پست الکترونیکی arshirneshan@yahoo.com

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