城市更新中窗户碳排放的影响研究
Influence of Carbon Emissions of Windows in Urban Renewal
李峥嵘 1周惠文 1张道杰 2李翠 1孙静婷 3程立宁4
作者信息
- 1. 同济大学机械与能源工程学院,上海 201804
- 2. 上海临港弘博新能源发展有限公司,上海 201306
- 3. 同济大学土木工程学院,上海 201804;同济大学建筑设计研究院(集团)有限公司,上海 200092;同济大学机械工程博士后流动站,上海 201804
- 4. 特诺发(上海)窗业有限公司,上海 201602
- 折叠
摘要
城市更新代替大规模建设与拆除已经成为建筑行业减碳的重要策略,但由于窗户等建筑围护结构构件的使用寿命与建筑主体结构差异较大,其在建筑维护、修缮与翻新中产生的碳排放必然对建筑全生命周期的碳排放有影响,然而现有相关研究常常忽视该问题.因此,有必要重新考虑围护结构构件寿命与建筑整体寿命不匹配因素,探讨窗户维护与更换对建筑碳排放测算的影响.以上海超低能耗建筑外窗为研究对象,建立3 种不同情景下窗户全生命周期碳排放计算模型,对比分析断桥铝合金窗、铝木复合窗、铝塑共挤窗和塑钢窗碳排放量差异.结果表明:若忽略建筑使用过程中窗户的维护与更换,将对窗户的全生命周期碳排放量计算带来约49%的碳排放计算误差.建筑寿命为 50 年时,通过有效维护获得长寿命的断桥铝合金窗产生的碳排放量相对最低,为 1072.2 kgCO2(原生铝)和 875.4 kgCO2(含回收材料).同时,在窗户型材中提高回收材料的占比,可以显著降低窗户全生命周期碳排放量,以断桥铝合金窗为例,窗框型材使用30%回收铝可降低约 18%的碳排放量.因此,在预期使用寿命较长的新建建筑或翻新建筑中,考虑建筑使用寿命与窗户碳排放间的耦合关系,选择持久耐用和含回收材料的窗户能够有效降低围护结构构件窗户的全生命周期碳排放量,从而降低建筑的全生命周期碳排放量.
Abstract
Urban renewal,rather than large-scale construction and demolition,has emerged as an important carbon-reduction strategy in the building sector.However,since the lifespan of building components such as windows differs significantly from that of the main building,their carbon emissions from maintenance,repair and retrofitting must have an impact on the building's life-cycle carbon emissions;yet previous studies have frequently ignored this issue.As a result,the unequal difference between the lifespan of the envelope components and that of the building must be reconsidered,as well as the impact of window maintenance and replacement on the measurement of building carbon emissions.Using the external windows of Shanghai's ultra-low energy buildings as the research object,a model was developed to calculate the full-life cycle carbon emissions of windows under three different scenarios,as well as to compare and analyze the carbon emissions differences of broken-bridge aluminium windows,aluminium-wood composite windows,aluminium-plastic co-extruded windows,and plastic-steel windows.The results show that ignoring window maintenance and replacement during the building's life cycle would result in a margin of error of 49%in calculating carbon emissions.Carbon emissions from long-life windows made of broken-bridge aluminium alloy through effective maintenance are relatively lowest at 1072.2 kgCO2(virgin aluminium)and 875.4 kgCO2(recycled aluminium)over a building life of 50 years.So increasing the proportion of recycled materials in window profiles can significantly reduce the life-cycle carbon footprint of windows.For example,using 30%recycled aluminum in window frame profiles can reduce carbon emissions by approximately 18%.Therefore,in new or refurbished buildings with a long expected lifespan,the coupling between the lifespan of the building and the carbon emissions of the windows should be considered,and the choice of windows that are durable and contain recycled materials can effectively reduce the life-cycle carbon emissions of the windows.
关键词
碳排放/窗户/城市更新/超低能耗建筑Key words
carbon emission/window/urban renewal/ultra-low energy buildings引用本文复制引用
基金项目
上海市2021年"科技创新行动计划"资助项目(21DZ208400)
出版年
2023
NETL
NSTL
维普
万方数据