共查询到20条相似文献,搜索用时 78 毫秒
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二甲醚在柴油机上的应用与研究 总被引:2,自引:0,他引:2
分析了二甲醚的化学结构及理化性质,指出二甲醚是柴油机清洁的代用燃料,给出在柴油机上使用纯二甲醚及含甲醇及水的二甲醚的燃料特性及排放性能比较。 相似文献
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植物油用作柴油机代用燃料的研究 总被引:6,自引:0,他引:6
本文对废气涡轮增压中冷、预燃室式柴油机燃机用植物油与燃用柴油机的特性做了大量对比试验研究,讨论了柴油机燃用植物油存在的一些技术问题,并提出了相应的解决措施。结果表明,柴油机燃用植物油时,其功率特性、油耗特性及排放特性等均能满足使用要求。 相似文献
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柴油机含氧清洁燃料研究简述 总被引:3,自引:0,他引:3
阐述了国内外柴油机代用燃料研究情况,同时重点分析了含氧清洁代用燃料研究的现状及成果,研究结果表明,使用DME作为柴油机的代用燃料,其NOx,微粒,SO2,碳烟排放均较低。 相似文献
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ZS195柴油机燃用二甲醚(DME)-柴油混合燃料的试验研究 总被引:10,自引:0,他引:10
二甲醚粘度低,会使高压供油系统产生泄漏及早期磨损。在二甲醚中添加低比例的柴油(简称二元燃料),其柴油既参与燃烧,又相应提高了混合燃料的粘度。首先对二甲醚添加低比例的柴油进行优化并对柴油机供油量、供油提前角和针阀开启压力进行优化匹配,然后对ZS195柴油机燃用二元燃料进行试验研究。结果表明:在ZS195柴油机上燃用二元燃料,其功率和转矩略优于原柴油机,发动机在全负荷范围内接近无烟排放,NOχ大幅度下降。试验还表明,采用这种二元燃料可使供油系统长期稳定地工作。 相似文献
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直喷柴油机燃用二甲醚的试验研究 总被引:19,自引:1,他引:19
在直接喷射式柴油机上进行了燃用二甲醚的试验研究,对柱塞有效行程和柱塞直径、供油提前角、喷油压力、进气涡流比、喷嘴型式等燃烧系统主要参数对发动机功率和热效率的影响进行了研究,在燃料供给系统中增加燃油输送泵,消除了气阻,发动机可以在宽广的转速和负荷范围内稳定运行,发动机热效率比原机高3% 。在优化燃烧系统参数的基础上对示功图和排放的测量及计算表明:二甲醚发动机最高爆发压力、最大压力升高率和 N Ox 排放均低于原机,烟度排放为0。试验结果显示了直喷式柴油机燃用二甲醚在降低排放方面的优越性能。 相似文献
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简要介绍了生物柴油的主要制备方法和燃料特性,综述了生物柴油对车用柴油机的低温起动性能、动力性、经济性,排放特性以及燃烧特性影响的研究进展,阐述了近期针对生物柴油研究的新对象和新方法,并探讨了生物柴油的应用前景。 相似文献
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D. Y. Han Z. B. Cao W. W. Shi X. D. Deng T. Y. Yang 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2016,38(18):2687-2692
Polyoxymethylene dimethyl ethers (PODE3–8) is a new type of diesel fuel additive that can improve combustion and reduce pollution emissions significantly. In this study, the effect of the different ratios of PODE3-8 to diesel on the properties of diesel fuel was studied. The results showed that 20% of the mixed sample improved the quality of diesel oil, reducing the pour point from to –6℃, enhancing the cetane number from 46 to 53.6, and increasing the flashpoint from 55 to 57℃. All other technical specifications of polyoxymethylene dimethyl ether and 20% blending diesel were in accordance with the Chinese National Standards of 0#diesel. 相似文献
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以野生小球藻生物柴油(Chlorella Biodiesel Fuel,CBF)-柴油作为混合燃料,利用186FA柴油机进行台架试验。在CBF的掺混比例分别为0%,3%,5%(B0,B3,B5)时,对柴油机的动力性、燃料燃用的经济性和燃烧及排放特性进行了比较分析。试验分析表明:柴油机燃用混合燃料时,与燃用纯柴油相比,随着CBF掺混比例的增加,其扭矩和功率略有下降,最大降幅均为4%;柴油机的油耗率和能耗率略有上升,且在高、中负荷时更为明显;柴油机的缸内压力、放热率峰值稍有减小,而压力升高率峰值稍有增大,缸内压力峰值最大降幅为3.4%,放热率峰值最大降幅为12.8%,压力升高率峰值最大增幅为13.7%;柴油机滞燃期缩短了0.5~1.0°CA、燃烧持续期延长了1.0~2.0°CA,缸内压力、压力升高率和放热率峰值的出现时刻均提前了1.0~2.0°CA,燃烧速度加快;HC,CO和碳烟的排放均有所降低,而NOX的排放逐渐增多,全负荷时HC和碳烟排放的最大降幅分别为14.1%和31.7%,NOX排放的最大增幅为9.7%,CO排放的降幅为6%~12%。 相似文献
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The electrooxidation behavior of dimethyl ether (DME) dissolved in acidic, neutral or alkaline anolyte has been studied. The cyclic voltammetry measurements reveal that DME in alkaline anolyte demonstrates higher electrooxidation reactivity than that in acidic or neutral anolyte. With increasing the NaOH concentration in the anolyte, the electrooxidation reactivity of DME can be further improved. Direct dimethyl ether fuel cells (DDFCs) are assembled by using Nafion membrane as the electrolyte, Pt/C as the cathode catalyst, and Pt-Ru/C as the anode catalyst. It is found that the use of alkaline anolyte can significantly improve the performance of DDFCs. A maximum power density of 60 mW cm−2 has been achieved when operating the DDFC at 80 °C under ambient pressure. 相似文献
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Zhen Huang Xinqi Qiao Wugao Zhang Junhua Wu Junjun Zhang 《Frontiers of Energy and Power Engineering in China》2009,3(1):99-108
As a developing and the most populous country in the world, China faces major challenges in energy supply and environmental
protection. It is of great importance to develop clean and alternative fuels for internal combustion engines. On the basis
of researches on DME engine and vehicle at Shanghai Jiaotong University in the last twelve years, fuel injection, combustion,
performance and exhaust emissions of DME engine and DME vehicle are introduced in this paper. The results indicate that DME
engines can achieve high thermal efficiency and ultra low emissions, and will play a significant role in meeting the energy
demand while minimizing environmental impact in China. 相似文献
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With life cycle assessment (LCA) methodology, a life cycle model of coal-based dimethyl ether (CBDME) as a vehicle fuel is established for China. Its life cycle from well to wheel are divided into three phases. They are feedstock extraction, fuel production and fuel consumption in vehicle. The primary energy consumption (PEC) and global warming potential (GWP) of CBDME pathway are analyzed and compared with coal-based diesel (CBD) as a latent rival to replace conventional petroleum-based diesel (CPBD). 相似文献
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As a developing and the most populous country in the world, China faces major challenges in energy supply and environmental protection. It is of great importance to develop clean and alternative fuels for internal combustion engines. On the basis of researches on DME engine and vehicle at Shanghai Jiaotong University in the last twelve years, fuel injection, combustion, performance and exhaust emissions of DME engine and DME vehicle are introduced in this paper. The results indicate that DME engines can achieve high thermal efficiency and ultra low emissions, and will play a significant role in meeting the energy demand while minimizing environmental impact in China. 相似文献