清单选择对乡村建筑物化碳排放的影响分析

Influence Analysis of Inventory Selection on the Embodied Carbon Emissions of Rural Buildings

为研究乡村建筑结构体系的物化碳排放特征及影响因素,基于不同的数据清单选择,对砌块砌体结构与混凝土框架结构的碳排放进行了对比分析。采用情景模拟法分析了系统边界对计算结果可靠性的影响,并开展了详细的碳排放贡献分析。结果表明,采用不同数据清单计算的碳排放水平具有较大的离散性,在确定计算范围时,除按现行标准规定的重量比选择主材外,应加强对高碳排放因子材料和高造价材料的分析,以减小误差。相较而言,现有技术条件下框架结构的碳排放水平较高,但通过降低钢材、水泥的生产能耗或提高材料回收率,该结构方案具有减排潜力。

In order to investigate the characteristics and influencing factors of embodied carbon emissions from rural building structures,the block masonry structure and concrete framed structure were compared according to different data inventories.Furthermore,scenario analyses were conducted to evaluate the influences of system boundaries,and a detailed contribution analysis was carried out on the embodied emissions.The results indicated that,there were considerable differences in the emissions assessed based on various inventories.With respect to the scope of calculation,attention should be paid to the materials with high emission factors and monetary values,in addition to the main materials determined by the weight ratios in the current standard.By contrast,the concrete framed structure was found to generate higher emissions within the current technical framework;however,this structure scheme has emission reduction potentials by reducing the production energy use or improving the recycling rates of steel and cement in the future.