Assessing combustion and emission performance of direct use of SVO in a diesel engine by oxygen enrichment of intake air method |
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| Affiliation: | 1. Economic Development Research Center of Wuhan University, China;2. Economic and Management School of Wuhan University, China;3. School of Economics, Chongqing Technology and Business University, China;4. Asian Development Bank, Philippines;5. School of Urban and Regional Science, Shanghai University of Finance and Economics, China;6. Department of Economics, Leiden University, Netherlands;7. School of Statistics, Beijing Normal University. China;8. Institute of Digital Finance, Peking University, China;1. National School of Development, Peking University, People''s Republic of China;2. Central Bank''s Monetary Policy Committee, People''s Republic of China;3. State Administration of Foreign Exchange, People''s Republic of China;4. Development Strategy and Governance Division, International Food Policy Research Institute (IFPRI), Washington, DC, USA;1. Centre d''Economie de la Sorbonne (CES), Maison des Sciences Economiques, Maria Bas, University of Paris 1, 106-112 Bd de l''Hôpital, 75647 Paris, France;2. Caroline Paunov, OECD, Directorate for Science, Technology and Innovation, 2, rue André Pascal, 75775 Paris Cedex 16, France;1. Department of Economics, the University of Minnesota, United States;2. School of Economics, Singapore Management University, Singapore;3. Sauder School of Business, the University of British Columbia, Canada;4. Federal Reserve Bank of Minneapolis, United States;5. The National Bureau of Economic Research, United States |
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| Abstract: | This work investigated the effect of the oxygen enrichment in the intake air of diesel engines on the combustion and emissions performance using rape seed oil (RSO) as a fuel. The purpose of the paper is to investigate the potential of oxygen enrichment in the intake air method to restrain the deterioration of particulate emissions of the RSO due to its high viscosity so as to explore the possibility of direct use of SVO (straight vegetable oil) in diesel engines, which can reduce CO2 emissions and save cost. The combustion parameters such as ignition delay, heat release rate, in-cylinder peak temperature and pressure were determined. Engine out particulate and gaseous emissions of the RSO were measured at oxygen concentrations from 21% (by volume) (no enrichment) to 24% (by volume) and compared to diesel results. The enrichment of the intake air with oxygen decreased the ignition delay and premixed combustion duration, and increased the in-cylinder peak pressure and temperature. The particulate, CO and hydrocarbon emissions were significantly reduced while the NOx emissions increased as the oxygen enrichment rate increased. 22% oxygen enrichment rate was suggested to achieve lower than diesel particulate emissions with the lowest NOx penalty. Increased NOx could be controlled by other methods. The results show that the oxygen enrichment in intake air method enabled direct combustion of SVO in diesel engines with reduced particulate, hydrocarbon and CO emissions. |
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