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Temperature dependency of burn-off emissions in the automobile industry.

机译：汽车工业中燃尽排放物的温度依赖性。

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摘要

This work characterized burn-off emissions from automobiles. After an exhaustive literature review, engine temperatures were determined to reach a maximum temperature of approximately 110°C, while exhaust system components reached a maximum temperature around 600°C. Metal-drawing fluids were used to bend the exhaust system components during manufacturing. Because these components were not rinsed prior to incorporation into a vehicle, residues could be left on the surfaces. An experimental test chamber was constructed to conduct controlled testing of three metalworking fluids of various types to mimic real-world conditions. Real-time particle number measurements were made using a condensation particle counter and an optical particle counter. The temperature at which burn-off begins to occur was found to be around 120 to 150°C. This burn-off was found to be an evaporation-condensation phenomenon when metalworking fluid residues vaporize and condense forming fine (0.1mum to 2.5mum) and ultrafine (0.1mum) aerosols. The temperature dependency of this phenomenon was observed to follow the Clausius-Clapeyron equation that states as temperature increases, vapor pressure increases. Most aerosol particles were observed to be in the range of less than 0.01mum to approximately 2.0mum.
机译：这项工作的特点是汽车排放的废气。经过详尽的文献审查后，确定发动机温度达到约110°C的最高温度，而排气系统部件达到约600°C的最高温度。在制造过程中，使用抽拉金属来弯曲排气系统部件。由于这些成分在掺入车辆之前没有经过冲洗，因此残留物可能会留在表面上。建造了一个实验测试室，以对三种类型的金属加工液进行受控测试，以模拟现实条件。使用冷凝粒子计数器和光学粒子计数器进行实时粒子数测量。发现开始发生燃尽的温度为约120至150℃。当金属加工液残留物汽化并冷凝形成细粉（0.1mum至2.5mum）和超细粉尘（<0.1mum）气雾剂时，这种燃尽现象是一种蒸发冷凝现象。观察到该现象的温度依赖性遵循Clausius-Clapeyron方程，该方程表示温度升高，蒸气压升高。观察到大多数气溶胶颗粒在小于0.01μm至约2.0μm的范围内。

著录项

  • 作者

    Scott, Krista Janette.;

  • 作者单位

    The University of Iowa.;

  • 授予单位 The University of Iowa.;
  • 学科 Health Sciences Occupational Health and Safety.;Engineering General.
  • 学位 M.S.
  • 年度 2008
  • 页码 52 p.
  • 总页数 52
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 职业性疾病预防;工程基础科学;
  • 关键词

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