建筑环境中碳吸收的动态会计
Elisabeth Van Roijen1, Seth Kane1, Jin Fan1
1Department of Civil and Environmental Engineering, University of California, Davis, California 95616, United States.
Environmental science & technology
|March 25, 2025
概括
将建筑材料转化为碳汇对于工业脱碳至关重要. 一个新的框架显示,长期储存生物碳的材料,如交叉层木材显著减少变暖影响.
科学领域:
- 建筑科学 建筑科学
- 环境科学环境科学
- 材料科学是一种材料科学.
背景情况:
- 建筑材料的传统生命周期评估 (LCA) 往往忽略了动态的CO2e流和时间效应.
- 仅专注于"摇篮到门"的排放,可能会误导材料对气候的净影响.
- 工业部门的脱碳需要将材料从排放者转变为碳汇.
研究的目的:
- 提出一个新的框架来分析建筑材料的摇篮到坟墓的二氧化碳e平衡.
- 为了将时间依赖的全球变暖潜力计算纳入动态CO2e会计.
- 评估材料对气候的影响,考虑到排放和碳吸收的时间.
主要方法:
- 开发一个依赖时间的CO2e平衡分析框架.
- 该框架在建筑环境中碳吸收的动态计算 (D-CUBE) 工具中的应用.
- 使用D-CUBE工具分析混凝土和交叉层木材 (CLT) 的案例研究.
主要成果:
- 动态会计显示,在CLT中长期存储生物碳可显著减少其变暖影响.
- 当考虑动态效应时,混凝土的缓慢碳化不会产生显著的全球变暖减少.
- D-CUBE工具可以在材料和生命周期阶段之间进行一致的比较.
结论:
- 时间依赖的CO2e分析对于准确评估建筑材料对气候的影响至关重要.
- D-CUBE工具提供了一个灵活的平台,用于识别排放热点和通往净碳封存材料的途径.
- 将建筑材料转化为碳汇,需要考虑碳流在它们的生命周期中的动态性质.
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