Study of fuel consumption when introducing DME or ethanol into diesel engine |
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| Affiliation: | 1. Biofuel Engine Research Facility, Queensland University of Technology, Brisbane, Australia;2. Petroleum and Gas Engineering Division, School of Computing, Science and Engineering, University of Salford, Manchester, United Kingdom;3. Department of Energy Technology, Aalborg University, Pontoppidanstraede 101, DK-9220 Aalborg East, Aalborg, Denmark;4. Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran;5. Danfoss Power Electronics A/S, Ulsnæs 1, DK-6300 Graasten, Denmark;1. Energy Technology Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton, SO17 1BJ, UK;2. Covaxe Ltd, Hawkesbury Upton, Gloucestershire, GL9 1AY, UK;1. School of Environmental Science and Engineering, Tianjin University, 300072 Tianjin, China;2. Shandong Chambroad Petrochemicals Co., Ltd., Shandong 256500, China;3. Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin University, 300072 Tianjin, China;4. State Key Laboratory of Engines, Tianjin University, 300072 Tianjin, China;1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China;2. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong |
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| Abstract: | An investigation of the effect of DME or ethanol on fuel consumption is conducted in a four-stroke, one-cylinder, direct-injection diesel engine. DME or ethanol is first heated to pyrolyze and then the resultant product gas is introduced into air intake. Brake Specific Fuel Consumption (BSFC) can be reduced a lot, when emulsified fuel (diesel fuel emulsified with water) is fueled to diesel engine and DME is heated to about 1000 K before its being introduced into air intake. Results show that BSFC can be decreased by about 10% and diesel fuel consumption can be decreased by 18%. High saving rate of BSFC up to 10% is also acquired using ethanol instead of DME. To achieve high saving rate of BSFC, the heating temperature of about 1000 K is needed for DME operation, while the diesel engine exhaust temperature of about 750 K is enough for pyrolyzing ethanol. Hydrogen produced in DME or ethanol pyrolysis is considered as the main reason for the excellent fuel saving. The technique adopted in the present work is extremely easy to utilize, and may be firstly adopted on diesel engines for power plants, trains, ships, etc. |
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