村镇城市化进程中某居住建筑全生命周期碳排放案例研究
Case study on whole life cycle carbon emissions of a residential building in urbanization process of rural areas
摘要：
城市化进程中的居住建筑重建关系国计民生,清洁低碳城市化进程对我国“双碳”目标的实现具有积极的推动作用。因此,在陕西省某村镇城市化改造的背景下,以某居住建筑为研究对象,对比分析了该建筑重建前后的全生命周期碳排放强度水平。结果表明:拆迁前居住建筑围护结构传热系数较高是导致其运营阶段供暖与供冷碳排放强度较高的核心原因;该村镇居住建筑重建后的人均碳排放强度从3.5 kg/(人·a)降低至1.9 kg/(人·a),降低幅度达45.7%。重建房相比拆迁前的自建房,提供了更大的人均居住建筑面积,提升了居住环境和居住体验,显著降低了建筑人均碳排放水平。研究成果可为城市化改造背景下的居住建筑绿色与低碳发展提供案例支撑与数据参考。
Abstract：
The reconstruction of residential buildings during the urbanization process is crucial to national development and public well-being. A clean and low-carbon urbanization process plays a positive role in promoting the achievement of the “double carbon” goal in China. Therefore, in the context of urbanization transformation in a village and town in Shaanxi Province, this study selects a residential building as the research object and compares the whole life cycle carbon emission intensity before and after the building’s reconstruction. The results show that the high heat transfer coefficient of the building envelope before demolition is the main reason for the high carbon emission intensity during the heating and cooling stages of operation. The per capita carbon emission intensity of residential buildings in the village and town is reduced from 3.5 kg/(person·a) to 1.9 kg/(person·a), with a decrease of 45.7%. Compared with the self-built houses before demolition, the reconstructed houses provide larger per capita residential building areas, improve living conditions and experiences, and significantly reduce per capita carbon emissions. The research results are expected to provide case support and data references for the green and low-carbon development of residential buildings in the context of urbanization transformation.
Keywords:residential building; whole life cycle; urbanization; carbon emission; energy consumption; demolition; reconstruction