摘要
柴油机排放的尾气危害较为严重,为保护环境,最大程度地减少柴油机尾气污染,对柴油机代用燃料的研究已引起了关注.在柴油机众多的代用燃料中,以二甲醚、天然气和氢气为代表,分析了其作为柴油机代用燃料在燃烧特性、排放特性、动力性和经济性等方面的独特优势.结果表明,柴油机掺烧二甲醚在保证动力性的情况下,能同时降低NOx和碳烟排放;柴油机掺烧天然气能大幅减少碳烟排放,同时燃油经济性较好;柴油机掺烧氢气后碳烟排放较低,低负荷下能有效降低NOx排放,高负荷下NOx排放上升.
The harmful substance emissions of diesel engine are relatively serious, in order to alleviate the pollution, people have paid attention to the research on alternative fuels of diesel engine. Among the many alternative fuels of diesel engine, dimethyl ether, natu- ral gas and hydrogen have their unique superiority in consideration of combustion characteristics, emission characteristics, power and e-conomic characteristics of engine. The researches show that the diesel engine fueled with dimethyl ether can simultaneously reduce NOx and soot emissions under the condition of same horse-power, natural gas-diesel dual fuel engine can significantly reduce soot emissions and has better fuel economy, and hydrogen-diesel dual fuel engine has a low emission of soot, and the emissions of NOx are reduced under low load but increased under high load.
出处
《华北水利水电大学学报（自然科学版）》
2014年第1期77-80,共4页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
关键词
柴油机
代用燃料
二甲醚
天然气
氢气
diesel engine
alternative fuels
dimethyl ether
natural gas
hydrogen
