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Theoretical and experimental investigations on energy balance on DMDF engine

机译：DMDF发动机能量平衡的理论和实验研究

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摘要

This paper presented the analytical results for the energy balance of a diesel methanol dual-fuel (DMDF) engine. A methanol injection system was fixed on a diesel engine and let the engine to alternate to run in either the pure diesel (D) mode or DMDF mode. Primary application of the thermal balance analysis was to investigate the cause of methanol replacement ratio SR changing with engine loads. Calculations were conducted within the control volume by comparing each of the energy terms. The results show that the reduction in cooling loss in DMDF mode is the dominant factor for low SR at high loads. While, a substantial increase in incomplete combustion loss in DMDF mode is the most important reason for high SR at low loads. Another application of the thermal balance analysis was to research the cooling loss in DMDF mode which implied unique characteristics. Therefore, the changing methanol replacement rate SP experiments were carried out in various engine loads, giving the results that the cooling loss in DMDF mode is always lower than that in D mode, and it goes even lower as SP rises. Finally, the effect of methanol temperature on SR was also investigated from the thermal balance point of view. The results reveal that the incomplete combustion loss decreasing in higher methanol temperature conditions will lead to a certain extent of SR drop. All these results are related to the energy flow distribution within the engine. (C) 2015 Elsevier Ltd. All rights reserved.
机译：本文介绍了柴油甲醇双燃料（DMDF）发动机能量平衡的分析结果。甲醇喷射系统固定在柴油发动机上，并使发动机交替运行以在纯柴油（D）模式或DMDF模式下运行。热平衡分析的主要应用是研究甲醇替代率SR随发动机负载变化的原因。通过比较每个能量项在控制量内进行计算。结果表明，DMDF模式下冷却损失的减少是高负载下低SR的主要因素。同时，DMDF模式下不完全燃烧损失的大幅增加是在低负载下获得高SR的最重要原因。热平衡分析的另一个应用是研究隐含独特特性的DMDF模式下的冷却损失。因此，在各种发动机负载下进行了变化的甲醇替代率SP实验，结果表明DMDF模式下的冷却损失始终低于D模式下的冷却损失，并且随着SP的升高甚至更低。最后，还从热平衡的角度研究了甲醇温度对SR的影响。结果表明，在较高甲醇温度条件下，不完全燃烧损失的减少将导致一定程度的SR下降。所有这些结果都与发动机内的能量流分布有关。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Fuel》 |2016年第15期|393-402|共10页
  • 作者

    Han Guopeng; Yao Anren; Yao Chunde; Wang Quangang; Wang Bin; Wei Hongyuan; Wu Taoyang; Liu Meijuan;

  • 作者单位

    Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China;

    Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China;

    Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China;

    Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China;

    Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China;

    Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China;

    Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China;

  • 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

    Diesel methanol dual fuel; Energy balance; Diesel engine;

    机译：柴油甲醇双燃料;能量平衡;柴油发动机;

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