共查询到14条相似文献,搜索用时 31 毫秒
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天然气汽车及天然气加气站的经济性分析 总被引:3,自引:0,他引:3
黄雄健 《小型内燃机与摩托车》2009,38(2)
论述了国内外天然气汽车的发展现状与趋势,对天然气汽车和天然气加气站进行了经济分析,指出天然气作为汽车替代燃料具有一定的经济优势和较大的环保效益,快速发展天然气汽车产业对改善城市大气环境具有重要意义. 相似文献
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介绍了LNG的基本性质和大连LNG项目的进展情况;通过对大连石化分公司加工进口含硫原油技术改造工程的燃料和制氢原料分析,探讨了应用LNG作为制氢原料和替代燃料的可能性和经济性;并提出了解决未来乙烯工程建设所面临燃料问题的规划建议。 相似文献
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正随着经济的不断发展和汽车保有量的急剧增加,我国交通运输行业的能源需求总量呈强劲增长态势,石油供需矛盾、温室气体排放以及城市大气污染进一步加剧。依据国际能源署(IEA)预测,我国到2030年汽车保有量将超过4亿辆,届时汽车能源消耗量将超过4亿吨当量化石燃料。因此,发展我国汽车车用燃料的多元化和清洁化替代显得日益紧迫和重要。 相似文献
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从满足未来汽油机经济性和排放的要求出发,提出应用先进的排气处理技术、空燃比控制技术及二冲程油气油机实现电控燃油喷射是达到上述目标的有效途径,为车用汽油机电控技术的应用与开发提供了参考依据。 相似文献
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煤基燃料的经济性和风险分析 总被引:3,自引:0,他引:3
随着世界石油危机再度显现,研发和生产石油替代品成为人们关注的热点。我国石油资源匮乏,煤炭资源相对丰富,大力发展以煤为原料的煤基燃料是解决能源安全供应问题的重要途径之一。本文论述了三种不同的煤基燃料——煤制油、煤制甲醇和二甲醚的市场潜力和发展趋势,并深入分析了其经济性和面临风险。与煤制油相比,甲醇和二甲醚具有明显的技术和经济优势。煤基燃料项目将面临国际原油市场价格波动风险、国内煤炭市场价格波动风险以及国家产业政策等风险。 相似文献
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Calculation models for prediction of Liquefied Natural Gas (LNG) ageing during ship transportation 总被引:1,自引:0,他引:1
A group of European gas transportation companies within the European Gas Research Group launched in 2007 the ‘MOLAS’ Project to provide a software program for the analysis of the Liquefied Natural Gas (LNG) ageing process during ship transportation. This program contains two different modeling approaches: a physical algorithm and an ‘intelligent’ model. Both models are fed with the same input data, which is composed of the ship characteristics (BOR and capacity), voyage duration, LNG composition, temperature, pressure, and volume occupied by liquid phase at the port of origin, together with pressure at the port of destination. The results obtained are the LNG composition, temperature and liquid volume at the port of destination. Furthermore, the physical model obtains the evolution over time of such variables en route as it is based on unsteady mass balances over the system, while the i-model applies neural networks to obtain regression coefficients from historical data composed only of origin and destination measurements. This paper describes both models and validates them from previous published models and experimental data measured in ENAGAS LNG regasification plants. 相似文献
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车用压缩天然气组分对天然气发动机燃烧、排放影响的计算分析 总被引:3,自引:0,他引:3
根据我国天然气组分变化的情况,采用双区模型模拟计算的方法,研究了在过量空的系数为1时,天然气组分变化对火花点式发动机燃烧压力、燃烧温度及CO2、CO、NO排放特性的影响。计算结果表明:干天然气、具有我国平均组分的天然气和凝析气,其组分的变化对动力性影响不大,主要影响排放特性;但如果天然气中含有过多的低热值燃料或惰性气体(但仍符合我国的天然气成分标准),则同时对动力性和排放特性产生明显的影响。将计算结果与我国的汽车用压缩天然气标准中的技术要求进行 了对比,指出了我国车用天然气技术标准的不足。 相似文献
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沅水流域梯级电站优化运行方式与效益分析 总被引:1,自引:1,他引:1
分析了当前丰枯、峰谷电价条件下沅水流域梯级电站联合调度方案以及优化运行产生的效益,提出了三板溪、托口、五强溪等调节能力较强的水库的水位控制方案,得出了相应的发电量和发电收入过程。同时分析了在优化运行情况下沅水全流域梯级电站对提高下游防洪能力所起的作用以及增加的发电效益。研究结果对沅水流域水库联合调度和水资源利用具有指导意义。 相似文献
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Transportation has dominated global fuel consumption and greenhouse gas emissions have risen in an alarming rate. Gasoline and diesel consumption for road transport have a faster growing rate than other sector and the trend appeared to be rapidly moving upwards in the near future. This has caused much concern in many countries including Malaysia to improve the sustainable energy of this sector. The focus of this paper is to analyze the trends of energy pattern and emission of road transport in Malaysia. On top of that, the review of prospective policies such as fuel economy standards and fuel switching to natural gas as well as biodiesel are summarized in this study. The study found that there is an urgent need to adopt suitable energy policy to balance the energy demand and reduce emission in this sector. This study serves as a guideline for further investigation and research in order to implement and improve the transportation sector. 相似文献