Performance and Emissions of Direct Injection Diesel Engine Fueled with Diesel Fuel Containing Dissolved Methane

详细信息    查看全文

• 作者：Junqiang Zhang ; Deming Jiang ; Zuohua Huang ; Xibin Wang ; and Qi Wei
• 刊名：Energy & Fuels
• 出版年：2006
• 出版时间：March 2006
• 年：2006
• 卷：20
• 期：2
• 页码：504 - 511
• 全文大小：473K
• 年卷期：v.20,no.2(March 2006)
• ISSN：1520-5029

文摘

Four blended fuels were prepared by dissolving methane into diesel fuel under different pressures to formdifferent dissolved methane concentrations. The dissolved methane concentrations were 0, 10.1, 16.1, and23.8 milliliters of methane per milliliter of diesel fuel (mL/mL) at standard ambient temperature of 273.16 Kand pressure of 101.325 kPa, respectively. The influences of the dissolved methane in diesel fuel on engineperformance and emissions were examined in a single cylinder direct injection (DI) diesel engine. The studyshows that there exists both a positive and a negative influence on the brake specific fuel consumption (BSFC)and the effective thermal efficiency depending on the methane concentration in diesel fuel. The blended fuelof diesel/methane with a methane concentration of 10.1 mL/mL gives the higher BSFC and the lower effectivethermal efficiency than those of pure diesel fuel, but the blended fuels with methane concentrations of 16.1and 23.8 mL/mL show the lower BSFC and the higher effective thermal efficiency as compared with those ofpure diesel fuel. The ignition delay of the diesel fuel containing dissolved methane is larger than that of purediesel fuel, and the value increased with the increase of methane concentration. However, the maximum heatrelease rate decreases with the increase of methane concentration. The diesel fuels containing dissolved methaneproduce less NO_x emissions as compared with that of pure diesel fuel, while the influences of the dissolvedmethane on smoke depend on the methane concentration. For the blended fuels with methane concentrationsof 16.1 and 23.8 mL/mL, the smoke emission presents a decrease. At an appropriate methane concentration,both NO_x and smoke emissions decrease simultaneously. The hydrocarbon emission of diesel fuel containingdissolved methane is larger than that of pure diesel fuel, and the dissolved methane has little influence oncarbon monoxide emission.