探索车辆中的颗粒物度和内外比率:实时道路测试研究
Danlu Wang1, Zhenglei Li2, Yunjing Wang3
1State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
The Science of the total environment
|February 10, 2024
概括
车辆通风设置显著影响室内颗粒物 (PM) 水平. 使用再循环模式 (RC) 与室外空气 (OA) 相比,大大降低了PM暴露,使得使用预测模型更容易评估暴露.
科学领域:
- 环境科学 环境科学
- 空气质量监测 空气质量监测
- 交通 卫生 交通 卫生
背景情况:
- 车内对颗粒物 (PM) 的暴露可能高于环境水平.
- 在真实驾驶条件下精确测量室内PM度具有挑战性.
- 了解影响车载PM的因素对于暴露评估至关重要.
研究的目的:
- 为了评估车辆内部的颗粒物 (PM1,PM2,5,PM10) 水平.
- 确定影响车载PM度和比率的关键因素.
- 开发用于车载PM暴露评估的预测模型.
主要方法:
- 在各种驾驶条件下测量PM1,PM2.5和PM10度.
- 收集了影响因素的数据:通风设置 (循环与室外空气),车辆年龄,车内体积,速度,温度和湿度.
- 开发了PM内部与外部 (I/O) 比率的预测模型.
主要成果:
- 再循环通风 (RC) 与室外空气 (OA) 相比,显著降低了PM度和I/O比率.
- PM2.5的I/O比率与PM1和PM10的I/O比率 (>85%的变化) 有很强的相关性.
- 预测模型解释了>40% (RC) 和>60% (OA) 的I/O比率变化,具有不同的特征重要性.
结论:
- 通风设置是车载PM暴露的关键决定因素.
- 开发的模型使在现实驾驶环境下更容易测量车载PM暴露.
- 车辆的特性会影响PM水平,尤其是在循环模式下.
相关概念视频
Mean free path and Mean free time
3.6K
Consider the gas molecules in a cylinder. They move in a random motion as they collide with each other and change speed and direction. The average of all the path lengths between collisions is known as the "mean free path."
3.6K
Measuring Reaction Rates
25.1K
Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical...
25.1K


