Global transition of operational carbon in residential buildings since the millennium

IF 13 Q1 ENERGY & FUELS Advances in Applied Energy Pub Date : 2023-09-01 DOI:10.1016/j.adapen.2023.100145
Xiwang Xiang , Nan Zhou , Minda Ma , Wei Feng , Ran Yan
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引用次数: 25

Abstract

The residential sector is the third-largest energy consumer and emitter globally and as such is at the forefront of the energy transition and net-zero emissions pathway. To accelerate the pace of decarbonization of residential buildings, this study is the first to present a bottom-up assessment framework integrated with the decomposing structural decomposition method to evaluate the emission patterns and decarbonization process of residential building operations in 56 countries spanning 12 regions worldwide from 2000 to 2020. The results show that (1) the operational carbon intensity of global residential buildings has maintained an annual decline of 1.2% over the past two decades, and energy intensity and average household size have been key to this decarbonization; (2) end uses have held an increasingly important role in decarbonizing global residential buildings (-46.3 kgs of carbon dioxide per household per year), with the largest contributors being appliances(38.3%), followed by space heating (21.2%) and lighting (12.6%); and (3) although the total decarbonization of global residential buildings was 7.1 gigatons of carbon dioxide and achieved a decarbonization efficiency of 9.4% per yr during this time period, regional decarbonization inequality and uneven distribution remained quite large, especially in emerging economy regions. Moreover, the uncertainty and robustness of the assessment framework are also tested, and adaptive high decarbonization strategies are further proposed for global residential buildings. Overall, this study reviews and compares global and regional performances and motivations for decarbonization to support national decarbonization efforts to reach net-zero emissions and advance the global residential building sector toward a carbon-free century.

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千年以来全球住宅建筑运营碳的转变
住宅部门是全球第三大能源消费和排放部门,因此处于能源转型和净零排放途径的前沿。为了加快住宅建筑的脱碳步伐,本研究首次提出了一个自下而上的评估框架,结合分解结构分解方法,对2000 - 2020年全球12个地区56个国家的住宅建筑运营的排放模式和脱碳过程进行了评估。结果表明:(1)近20年来,全球住宅建筑的运行碳强度保持了每年1.2%的下降趋势,能源强度和平均家庭规模是实现这一目标的关键;(2)终端用途在全球住宅建筑脱碳中发挥着越来越重要的作用(每户每年减少46.3公斤二氧化碳),其中最大的贡献者是家电(38.3%),其次是空间供暖(21.2%)和照明(12.6%);③在此期间,尽管全球住宅建筑脱碳总量为71亿吨二氧化碳,脱碳效率为9.4% /年,但区域间的脱碳不平等和分布不均仍然较大,尤其是在新兴经济体地区。此外,还对评估框架的不确定性和鲁棒性进行了测试,并进一步针对全球住宅建筑提出了适应性高脱碳策略。总体而言,本研究回顾并比较了全球和区域的脱碳表现和动机,以支持各国实现净零排放的脱碳努力,并推动全球住宅建筑行业迈向无碳世纪。
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来源期刊
Advances in Applied Energy
Advances in Applied Energy Energy-General Energy
CiteScore
23.90
自引率
0.00%
发文量
36
审稿时长
21 days
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