...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel >Methanol as an octane booster for gasoline fuels
【24h】

Methanol as an octane booster for gasoline fuels

机译：甲醇作为汽油燃料的辛烷增压器

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Octane rating is an essential property for gasoline-type fuels because it is the major factor that determines the maximum compression ratio (CR) allowed in spark-ignition engines. In practice, a base gasoline, which is a mixture of various refinery streams, is dosed with octane-booster additives for meeting the minimum octane requirements set by regulation standards. Coal-based methanol is widely used in China as a gasoline octane-booster. In addition to its high octane rating, methanol's cooling effect derived from its low latent heat and its high octane sensitivity also contribute to engine knocking suppression in spark-ignition direct-injection (DISI) engines. Thus, fully understand the role of methanol addition in gasoline is highly relevant to estimate the potential thermal efficiency gain for methanol blends. The novelty of this paper is that methanol's chemical effect, cooling effects and octane sensitivity effects on engine knocking suppression are quantitatively converted to an effective octane index (EOI), a parameter for comprehensively describing the anti-knocking properties of a gasoline-type fuel. Then Delta EOI of methanol blends (EOI_blend - EOI_base) was used for estimating engine thermal efficiency gain in compression ratio (CR) matched DISI engines. Results suggest that methanol's cooling effect is as significant as its high octane rating. For example, the cooling effect of methanol corresponds to 19 unit of octane in a blend with 70 vol% methanol (M70). The indicated thermal efficiency gain is up to 30% for M70 with RON81.1 base gasoline. The reduction in the lower heating value (LHV) of methanol blends lead to higher fuel consumption, which can be partially or even entirely offset by the improved indicated thermal efficiency. Overall, this paper highlighted the effectiveness of methanol as an octane and thermal efficiency booster.
机译：辛烷值是汽油型燃料的主要属性，因为它是确定火花点火发动机中允许的最大压缩比（CR）的主要因素。实际上，作为各种炼油流的混合物的基础汽油，用辛烷 - 增强剂添加，用于满足通过调节标准的最小辛烷值要求。煤基甲醇广泛应用于中国作为汽油辛烷 - 助推器。除了高辛烷值之外，甲醇的冷却效果来自其低潜热及其高辛烷值敏感性还有助于发动机敲击火花点火直喷（DISI）发动机。因此，充分了解甲醇添加在汽油中的作用是高度相关的，以估计甲醇共混物的潜在热效率增益。本文的新颖性是甲醇的化学效果，对发动机爆震抑制的化学效果，冷却效应和辛烷值敏感性效应被定量地转化为有效的辛烷值指数（EOI），一种用于综合描述汽油型燃料的抗敲击性能的参数。然后使用甲醇共混物（EOI_BLEND - EOI_Base）的Delta EOI用于估计压缩比（CR）匹配的DISI发动机的发动机热效率增益。结果表明，甲醇的冷却效果与其高辛烷值一样重要。例如，甲醇的冷却效果对应于与70体积％甲醇（M70）的共混物中的19单位辛烷值。用RON81.1基础汽油的M70表示的热效率增益高达30％。甲醇共混物的下部加热值（LHV）的降低导致燃料消耗更高，这可以通过改善的指示的热效率部分或甚至完全偏离。总体而言，本文突出了甲醇作为辛烷值和热效率助推器的有效性。

著录项

  • 来源
    《Fuel》 |2019年第jul15期|76-84|共9页
  • 作者

    Wang Chongming; Li Yanfei; Xu Cangsu; Badawy Tawfik; Sahu Amrit; Jiang Changzhao;

  • 作者单位

    Tsinghua Univ State Key Lab Automot Safety & Energy Beijing 100084332 Peoples R China|Univ Birmingham Dept Mech Engn Birmingham B15 2TT W Midlands England;

    Tsinghua Univ State Key Lab Automot Safety & Energy Beijing 100084332 Peoples R China;

    Zhejiang Univ Coll Energy Engn Hangzhou 310027 Zhejiang Peoples R China;

    Univ Birmingham Dept Mech Engn Birmingham B15 2TT W Midlands England;

    Univ Birmingham Dept Mech Engn Birmingham B15 2TT W Midlands England;

    Univ Birmingham Dept Mech Engn Birmingham B15 2TT W Midlands England;

  • 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

    Methanol; Octane; DISI; Thermal efficiency;

    机译：甲醇;辛烷;DISI;热效率;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号