以椰子甲酯-柴油混合燃料为燃料的CRDI乘用车在驱动循环和稳定速度操作下的性能和排放研究

Rupert Karlo D. Aguila, E. Quiros, Jose Gabriel E. Mercado
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引用次数: 0

摘要

在过去的几年里,菲律宾实施了不同的地方法规来解决石油进口和环境问题。一项要求是减少柴油发动机的排放,同时减少化石燃料的使用。根据《清洁空气法》和《生物燃料法》,菲律宾政府正在寻找化石燃料的可能替代品,由于该国椰树丰富,该国目前使用的生物柴油之一是椰子甲酯。这项研究显示了CRDi客车用椰子甲酯混合柴油的性能和排放特性,将有助于政府证明提高商业燃料混合比例的合理性。本研究研究了0%,2%,5%,10%和20%椰子甲酯(CME)-柴油混合物。实验由日本10-15标准驱动循环试验和40、60、80 kph稳态试验组成,在菲律宾迪利曼大学车辆研究与测试实验室进行,配备底盘测功仪、燃油流量计和排放分析仪。测量的性能参数包括功率、比油耗和里程,同时测量CO、NOx、THC的排放特性。本实验未测量PM。在循环工况和稳态工况测试中,燃油消耗率和行驶里程均随燃油添加量的增加而提高,但结果表明两者与燃油添加量的增加无关。在循环工况和稳态工况试验中,5%CME与纯柴油的混合率分别为4.8%和8.5%,改善效果最好。大多数柴油-柴油混合燃料的排放,特别是CO和THC排放下降,这与已发表的文献一致。在稳态测试和驱动循环测试中,CO降低了29.5%,THC降低了64%。这可归因于整体稀薄混合物和在较高CME混合物中含氧燃料的增加。然而,在驱动循环测试中,所有燃料混合物的氮氧化物排放是一致的,而在稳态测试中,氮氧化物排放取决于发动机转速。%CME在40、60 km/h时呈下降趋势,在80 km/h时呈上升趋势。与纯柴油相比,所有混合燃料在所有速度下产生的平均功率基本不变。最后,最大功率变化不大,尽管大多数混合燃料与纯柴油相比功率降低很小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigation of Performance and Emissions of a CRDI Passenger Van Fuelled With Coconut Methyl Ester-Diesel Blends Using Drive Cycle and Steady Speed Operation
For the past years, Different Philippine local regulations have been imposed to address oil importation and to address environment concerns. One requirement is reduced emission from diesel engines and at the same time reduce the use of fossil fuels for the. In accordance to the Clean Air Act and the Biofuels Act, The Philippine government is looking for possible alternatives to fossil fuels, One of the biodiesel the country is currently using is coconut methyl ester due to the abundance of coconut trees in the country. This research shows the performance and emission characteristics of diesel blended with coconut methyl ester in a CRDi Passenger van and will help the government justify the increase in blend percentage mandated in commercial fuels. This study is investigates 0%, 2%, 5% 10% and 20% Coconut Methyl Ester (CME)-diesel blends. The experiment consisted of Japanese 10-15 standard drive cycle test, steady state test at 40,60, & 80 kph was performed in the Vehicle Research and Testing Laboratory in the University of the Philippines Diliman equipped with chassis dynamometer, fuel flow meter and emissions analyzer. Performance parameters measured are Power, Specific Fuel Consumption and Mileage, while emission characteristics for CO, NOx, THC are measured. PM measurements were not measured for this experiment. In both Drive cycle and steady state test specific fuel consumption and mileage improved with addition of CME, however results showed they are independent of CME percentage. The best improvement was observed with 5%CME blended with neat diesel at 4.8% and 8.5% for drive cycle and steady state test respectively. Majority of the CME-diesel blends showed decrease in emission specifically in CO and THC emission which is consistent to published literature. For both steady state test and drive cycle test up to 29.5% decrease inn CO and up to 64% decrease in THC was observed. This can be attributed to the overall lean mixtures and in the increase of oxygenated fuel at higher CME blends. NOx emission however is consistent for all fuel blends in the drive cycle test while for the steady state test NOx emission is dependnt on the engine speed. Decreasing trend was obtained for 40 and 60 km/h while increasing trend was obtrained at 80 km/h, with respect to %CME. Average power produced for all the speeds was basically constant for all the blends as compared with neat diesel. Lastly, maximum power showed insignificant changes although majority of the blends showed a minimal power reduction as compared to neat diesel.
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