Performance and emission comparison of a supercharged dual-fuel engine fueled by producer gases with varying hydrogen content

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• 作者：Murari Mohon Roy ; Eiji Tomita ; Nobuyuki Kawahara ; Yuji Harada ; Atsushi Sakane
• 关键词：Dual-fuel engine ; Supercharging ; Alternative fuel ; Producer gas ; Hydrogen content in producer gas ; Co-generation ; Injection parameters
• 刊名：International Journal of Hydrogen Energy
• 出版年：2009
• 出版时间：September 2009
• 年：2009
• 卷：34
• 期：18
• 页码：7811-7822
• 全文大小：900 K

文摘

This study investigated the effect of hydrogen content in producer gas on the performance and exhaust emissions of a supercharged producer gas–diesel dual-fuel engine. Two types of producer gases were used in this study, one with low hydrogen content (H₂ = 13.7 % ) and the other with high hydrogen content (H₂ = 20 % ). The engine was tested for use as a co-generation engine, so power output while maintaining a reasonable thermal efficiency was important. Experiments were carried out at a constant injection pressure and injection quantity for different fuel–air equivalence ratios and at various injection timings. The experimental strategy was to optimize the injection timing to maximize engine power at different fuel–air equivalence ratios without knocking and within the limit of the maximum cylinder pressure. Two-stage combustion was obtained; this is an indicator of maximum power output conditions and a precursor of knocking combustion. Better combustion, engine performance, and exhaust emissions (except NO_x) were obtained with the high H₂-content producer gas than with the low H₂-content producer gas, especially under leaner conditions. Moreover, a broader window of fuel–air equivalence ratio was found with highest thermal efficiencies for the high H₂-content producer gas.