基于LCA的既有建筑改造碳排放计算方法研究与应用

Research and Application of Carbon Emission Calculation Methods for Existing Building Retrofitting Based on LCA

生命周期分析(LCA)在建筑碳排放分析方面应用较为普遍,形成了针对新建建筑的分析方法,但对于既有改造建筑,存在适用性不佳、特征性不明显等问题。本文基于建筑领域生命周期评估标准,根据生命周期碳排放分析要求,结合既有建筑改造的碳排放特点,构建了既有建筑改造生命周期碳排放分析方法,提出了基于改造全生命期的碳减排量计算公式,探讨了碳成本视角下改造投资回收分析方法,并结合实际改造案例,验证了分析方法、碳减排量以及改造碳增量的回收平衡点。本研究可为既有建筑改造相关标准的碳排放分析和效益评价提供参考,并为既有建筑改造工程实践的碳减排分析提供技术依据。

Life cycle analysis(LCA)is widely used in the analysis of building carbon emissions,and has formed an analysis method for new buildings.However,for existing retrofitted buildings,there are problems of poor applicability and inconspicuous characteristics.By analyzing the life cycle assessment standards,life cycle carbon emission analysis requirements and the carbon emission characteristics of existing buildings retrofit,this paper developed a life cycle carbon emission analysis method of existing buildings retrofit.A calculation formula of carbon emission reduction based on the whole life cycle of buildings retrofit was then proposed.It further discussed the analysis method of retrofitting investment recovery from the perspective of carbon cost,and verified the analysis method,carbon emission reduction volume and the recovery balance point of the retrofit carbon increment based on actual case.This study can provide a reference for the carbon emission analysis and benefit assessment of the relevant standards of the existing buildings retrofit,and provide a technical basis for the carbon emission reduction analysis of the existing buildings retrofit project.