零碳目标下临时木结构建筑降碳策略与LCA碳排放研究——以2024世园会企业展园为例

Carbon Reduction Strategies and LCA Carbon Emission for Temporary Wooden Structures Under the Zero-Carbon Goal:A Case Study of the Corporate Pavilion at the 2024 International Horticultural Exhibition

以2024年世园会成都设计咨询集团企业展馆为例,探讨了基于零碳目标下小型临时木结构建筑如何采取源头减碳、过程降碳、末端消碳等三方面的低碳优化策略,并基于LCA全生命周期评估方法对其进行碳排放核算研究,得出针对小型临时建筑,建材生产与加工环节对建筑全生命周期碳排放影响最大,占比约为50.30%~69.49%,其次是运行阶段,占比约为19.33%~30.91%。通过对比分析目标建筑与同体量的轻钢结构建筑,目标建筑在采取不同的措施下可实现减碳率约36.00%~68.41%,建筑全生命周期(5年)单位面积的碳排放量可降低至382 kgCO_(2)eq/m^(2)。研究得出临时建筑各阶段融入降碳策略的重要性和运用LCA方法评估建筑碳排放的必要性,除运行阶段外,临时建筑需更加关注低碳材料的替代与拆除阶段材料的回收利用,为未来实现零碳建筑目标提供了新的思路和实践参考。

Concentrated on the corporate pavilion of Chengdu Design Consulting Group for the International Horticultural Exhibition 2024,low-carbon optimization strategies for small temporary wooden structures under the zero-carbon goal are expounded.It explores carbon reduction from the perspectives of the source,process,and end,based on the Life Cycle Assessment(LCA)method for carbon emission accounting.The findings indicate that,for small temporary buildings,the production and processing of building materials have the greatest influence on the lifecycle carbon emissions,accounting for approximately 50.30%to 69.49%,followed by the operational phase,which accounts for about 19.33%to 30.91%.Comparative analysis with a similar volume light steel structure building shows that different measures can achieve a carbon reduction rate of about 36.00%to 68.41%.The carbon emissions per unit area over the building's entire lifecycle(five years)can be reduced to 382kgCO_(2)eq/m^(2).The study underscores the importance of integrating carbon reduction strategies at various stages of temporary building construction and highlights the necessity of using the LCA method to assess building carbon emissions.Beyond the operational phase,there is a need to focus on the substitution of low-carbon materials and the recycling of materials during the demolition phase,providing new insights and practical references for achieving future zero-carbon building objectives.