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Emissions, performance and cylinder pressure of diesel engine fuelled by biodiesel fuel

机译:生物柴油为燃料的柴油发动机排放,性能和气缸压力

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摘要

Experimental studies have been carried out to investigate effects of biodiesel fuels on diesel engine performance, Carbon monoxide (CO) and nitric oxide (NO_x) emissions, exhaust gas temperature (T-(Exhaust)). oil temperature (T_(oil)), wall temperature (T_(wall)), and cylinder pressure with/without exhaust gas recirculation (EGR). Biodiesel fuels are prepared from cotton seed oil, palm oil and flax oil. All the measured parameters for biodiesel fuels are compared with the base diesel fuel with/without EGR for different engine speeds. Fuel inlet temperature of 120 ℃ gives minimum viscosity different between diesel and biodiesel fuels. Biodiesel fuels give slightly less brake power (BP), brake thermal efficiency (η_(Bth)) and slightly high brake specific fuel consumption (BSFC) and high fuel mass flow rate per cycle. Diesel fuel gives CO higher than biodiesel fuels due to less O atoms in fuel molecules. Biodiesel fuels give NO_x higher than diesel fuel due to high oxygen content in biodiesel fuels molecules and cetane number (CN). As EGR increases, CO increases while NO_x decreases due to decrease flame temperature and O_2 in fresh air charge. For biodiesel fuels, T_(Exhaust) and T_(oil) are higher than for diesel fuel. T_(Wall) for diesel fuel is higher than for all biodiesel fuels. Biodiesel fuels give peak cylinder pressure higher than diesel fuel. The position of peak cylinder pressure is arrangement as 11 crank angle degree (CAD) after top dead center (ATDC) for flax, 12 CAD ATDC for cotton, 14 CAD ATDC for palm and 20 CAD ATDC for diesel fuel respectively. The present work contributes in using biodiesel fuels as alternative fuel for diesel engines without major change for engines parts. For comparison between biodiesel and diesel fuels, the viscosity is not the main parameter affecting on engine performance and emissions.
机译:已经进行了实验研究以研究生物柴油燃料对柴油机性能,一氧化碳(CO)和一氧化氮(NO_x)排放,废气温度(T-(Exhaust))的影响。油温(T_(油)),壁温(T_(壁))和有/无排气再循环(EGR)的气缸压力。生物柴油燃料由棉籽油,棕榈油和亚麻油制备。对于不同的发动机转速,将所有测得的生物柴油燃料参数与带有/不带有EGR的基础柴油燃料进行比较。燃料入口温度为120℃,使柴油和生物柴油燃料的最小粘度不同。生物柴油燃料的制动功率(BP),制动热效率(η_(Bth))略低,制动比燃料消耗(BSFC)略高,每个循环的燃料质量流量高。由于燃料分子中的O原子较少,因此柴油使CO高于生物柴油。由于生物柴油燃料分子中的高氧含量和十六烷值(CN),生物柴油燃料产生的NO_x高于柴油燃料。随着EGR的增加,由于火焰温度降低和新鲜空气中的O_2降低,CO升高而NO_x降低。对于生物柴油燃料,T_(排气)和T_(机油)高于柴油燃料。柴油的T_(Wall)高于所有生物柴油的T_(Wall)。生物柴油燃料提供的峰值气缸压力高于柴油燃料。气缸的峰值压力位置分别为亚麻上死点(ATDC)之后的11个曲柄角度(CAD),棉花的12 CAD ATDC,棕榈的14 CAD ATDC和柴油的20 CAD ATDC。本工作有助于在不对发动机零件进行重大改动的情况下,将生物柴油用作柴油发动机的替代燃料。为了比较生物柴油和柴油燃料,粘度不是影响发动机性能和排放的主要参数。

著录项

  • 来源
    《Fuel》 |2013年第10期|513-522|共10页
  • 作者

    Mohamed Saied Shehata;

  • 作者单位

    Mechanical Engineering Department, Faculty of Engineering, King Khalid University, Saudi Arabia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Performance; Emissions; EGR; Diesel; Biodiesel fuels;

    机译:性能;排放物;废气再循环柴油机;生物柴油燃料;

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