寒冷地区低碳建筑改造适宜技术及路径研究

Appropriate Technology and Pathway for Low-carbon Building Transformation in Cold Areas

既有建筑低碳改造是建筑部门实现“双碳”目标的重要举措。以天津市一办公建筑低碳改造为例,构建寒冷地区既有公共建筑碳排放模型,假定低碳建筑含义,评估分析不同低碳化改造技术的碳减排率及低碳建筑适宜技术路径。结果表明:低碳改造后的建筑碳排放强度为37.79 kg/m^(2),在GB/T 51161—2016《民用建筑能耗标准》约束值的基础上降低了45.94%,可判定为低碳建筑;低碳建筑改造通过高性能围护结构技术、高效照明技术、浅层地热能技术、太阳能光伏技术等适宜技术路径,较改造前建筑节能率达到68.81%,碳减排率达到70.31%。

Low-carbon transformation of existing buildings is an important measure for the building sector to achieve the goal of"double carbon".Taking a low-carbon transformation of an office building in Tianjin as an example,a carbon emission model for existing public buildings in cold areas was constructed,and the meaning of low-carbon buildings was assumed.The carbon reduction rates of different low-carbon transformation technologies and the suitable technological paths for low-carbon buildings were evaluated and analyzed.The results show that the carbon emission intensity of the building after low-carbon transformation was 37.79 kg/m^(2),which is 45.94%lower than the constraint value of GB/T 51161-2016 Standard for Energy Consumption of Building,and can be judged as low-carbon building.The low-carbon building transformation achieved an energy-saving rate of 68.81%and a carbon reduction rate of 70.31%compared to before the transformation through suitable technological paths such as high-performance enclosure structure technology,efficient lighting technology,shallow geothermal energy technology,and solar photovoltaic technology.