Department of Mechanical Engineering, I.K. Gujral Punjab Technical University Campus, Hoshiarpur, 146001, India.
Adesh Institute of Engineering and Technology, Faridkot, 151203, India.
Environ Sci Pollut Res Int. 2018 Apr;25(10):9722-9729. doi: 10.1007/s11356-018-1247-4. Epub 2018 Jan 24.
Experimental investigation has been carried out to utilize biogas as an alternative source of energy in compression ignition (CI) engine under dual fuel operational mode. Biogas was inducted into the inlet manifold at different flow rates along with fresh air through inlet manifold and diesel was injected as a pilot fuel to initiate combustion under dual fuel mode. The engine performance and emission characteristics of dual fuel operational mode were analyzed at different biogas flow rates and compared with baseline conventional diesel fuel. Based upon the improved performance and lower emission characteristics under the dual fuel operation, the optimum flow rate of biogas was observed to be 2.2 kg/h. The lower brake thermal efficiency (BTE) and higher brake-specific energy consumption (BSEC) were noticed with biogas-diesel fuel under dual fuel mode when compared with neat diesel operation. Test results showed reduced NO emissions and smoke opacity level in the exhaust tailpipe emissions. However, higher hydrocarbon (HC) and carbon monoxide (CO) emissions were noticed under dual fuel mode at entire engine loads when compared with baseline fossil petro-diesel. Hence, the use of low-cost gaseous fuel such as biogas would be an economically viable proposition to address the current and future problems of energy scarcity and associated environmental concerns.
已经进行了实验研究，以利用沼气作为压燃式（CI）发动机在双燃料运行模式下的替代能源。沼气通过进气管以不同的流速与新鲜空气一起引入进气管，柴油作为引燃油喷射以在双燃料模式下引发燃烧。分析了不同沼气流量下双燃料运行模式的发动机性能和排放特性，并与基准常规柴油燃料进行了比较。基于双燃料运行下的性能提高和排放降低的特点，观察到沼气的最佳流量为 2.2kg/h。与纯柴油运行相比，沼气-柴油燃料在双燃料模式下的制动热效率（BTE）较低，制动比能消耗（BSEC）较高。试验结果表明，在整个发动机负荷下，与基线化石石油柴油相比，排气尾管排放中的氮氧化物（NOx）排放和烟度水平降低。然而，在双燃料模式下，碳氢化合物（HC）和一氧化碳（CO）排放较高。因此，使用低成本的气体燃料，如沼气，将是解决当前和未来能源短缺和相关环境问题的经济可行方案。
