Effect of Exhaust Gas Recirculation on the Combustion and Emissions of Dimethyl Ether in a Passenger Vehicle Diesel Engine
Publication: Journal of Energy Engineering
Volume 144, Issue 5
Abstract
The purpose of this work was to investigate the effect of the combustion and emission characteristics of dimethyl ether (DME), diesel fuel, and a DME-biodiesel blend on a passenger vehicle diesel engine. In this study, DME properties, atomization characteristics, and effects of the exhaust gas recirculation (EGR) rate on the combustion performance and emission characteristics of a diesel engine were investigated under single and split injection. The results show that DME atomization is better than that of conventional diesel fuel, and that increasing the EGR rate decreases the combustion pressure and heat release rate of the DME-biodiesel blend. Upon comparison, the maximum pressures of the pilot injections were significantly lower than those of the single injection for the DME-biodiesel. In addition, the maximum pressure decreased with the increasing EGR rate. However, the decrease was small compared with that of the pilot injection strategy. Exhaust emissions from the engine showed that increasing the EGR rate decreased combustion pressure and nitrogen oxide emissions, and increased hydrocarbon and carbon monoxide emissions. The soot was almost zero for the DME-biodiesel fuel and for the EGR rate variations.
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Acknowledgments
This research was supported by the Basic Science Research Program (Nos. 2017R1D1A1B03035064 and 2016R1D1A3B03935537) and the Basic Research Laboratory Program (No. 2015R1A4A1041746) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education.
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Information & Authors
Information
Published In
Journal of Energy Engineering
Volume 144 • Issue 5 • October 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Nov 26, 2017
Accepted: May 8, 2018
Published online: Aug 15, 2018
Published in print: Oct 1, 2018
Discussion open until: Jan 15, 2019
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