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相关概念视频

Phase Diagrams02:39

Phase Diagrams

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A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
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Rolling Resistance01:21

Rolling Resistance

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When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down...
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Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
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中国道路运输部门的省级脱碳潜力

Min Liu1, Yifan Wen1, Xiaomeng Wu1

  • 1School of Environment, State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China.

Environmental science & technology
|October 1, 2024
PubMed
概括

通过战略性去碳化,中国的公路运输二氧化碳排放量可以显著减少. 电气化乘用车是2030年之前达到排放峰值的关键,支持气候目标.

关键词:
在二氧化碳排放方面,二氧化碳排放量排放量清单 排放量清单是指排放量清单,是指排放量清单.缓解驱动因素的缓解驱动因素区域差异 区域差异 区域差异

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Implementation of Portable Emissions Measurement Systems PEMS for the Real-driving Emissions RDE Regulation in Europe
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相关实验视频

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科学领域:

  • 环境科学 环境科学
  • 运输工程 运输工程
  • 气候政策 气候政策

背景情况:

  • 道路运输是中国二氧化碳 (CO2) 排放的主要贡献者,影响了国家气候目标.
  • 了解当前政策的减缓潜力和确定新的战略对于有效的脱碳途径至关重要.

研究的目的:

  • 综合分析中国公路车辆的二氧化碳排放.
  • 评估已公布政策的减缓潜力,并探索各种车队的额外策略.
  • 通过提供对低碳运输转型的见解,支持中国的双碳目标.

主要方法:

  • 利用现实世界的数据库和最新的政策场景进行全面分析.
  • 根据当前趋势和公布的政策,开发综合场景来预测未来的二氧化碳排放.
  • 进行了场景分析,以确定不同车型的异质脱碳战略.

主要成果:

  • 中国的公路运输二氧化碳排放量在2022年估计为1.02亿,预计在没有新的战略的情况下会增加.
  • 根据综合情景,预计每年二氧化碳排放量将在2025年达到1235万的峰值,到2050年降至约200万.
  • 乘用车电气化是实现2030年之前碳峰值的最关键战略.

结论:

  • 传统车辆的燃油经济性改进在2035年之前有效减少卡车的二氧化碳排放.
  • 新能源汽车的推广为所有车队提供了显著的长期缓解潜力.
  • 针对车型量身定制的多元化策略对于优化中国低碳运输转型和实现气候目标至关重要.