Low-carbon assessment of building facades using dynamic CO2 intensity of electricity generation in Japan
Low-carbon assessment of building facades using dynamic CO2 intensity of electricity generation in Japan
复制标题
利用日本发电的动态二氧化碳强度对建筑外墙进行低碳评估
DOI：
10.1016/j.enbuild.2022.112637
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发表时间：
2023
影响因子：
6.7
通讯作者：
Srisamranrungruang Thanyalak
中科院分区：
文献类型：
--
作者：
Hiyama Kyosuke;Srisamranrungruang Thanyalak
为了促进一个地区的低碳供电，建筑用电需求应与最优供电模式同步。为此，讨论了在建筑设计中使用时变电力二氧化碳强度的有用性。首先对日本东京的每小时强度进行了估计和可视化，并使用通用办公模型的案例研究比较了改善的建筑性能的低碳影响。比较了两种情况：一种是增加窗户玻璃的遮阳性能，另一种是结合隔热、自然通风和屋檐的措施。在固定年排放强度的情况下，前者（19.4%）比后者（18.9%）更显著。相比之下，当使用小时强度时，储蓄率分别为18.1%和18.6%，扭转了优势。考虑随时间变化的二氧化碳强度可以帮助评估在高二氧化碳强度期间限制电力使用并将其转移到低二氧化碳强度期间的建筑设计。不仅要在机械系统评价中考虑时变因素，而且要在建筑设计中考虑时变因素，以促进区域向脱碳社会的过渡。
To promote low-carbon power supply in a region, the demand due to building use should be synchronized with the optimal supply patterns. To this end, the usefulness of using the time-varying CO2intensity of electricity in building design is discussed. Hourly intensities were first estimated and visualized for Tokyo, Japan, and the low-carbon impacts of improved façade performance were compared using case studies with a generic office model. Two cases were compared: one with increased solar shading performance of window glass and the other with combined measures of insulation, natural ventilation, and eaves. CO2emission savings rate were more significant in the first case (19.4 %) than the second case (18.9 %) when a fixed annual emission intensity was used. In contrast, when hourly intensities were used, the savings rate was 18.1 % and 18.6 %, respectively, reversing the superiority. Consideration of the time-varying CO2intensity could help evaluate building designs that limit electricity use during high CO2intensity and shift it to periods of low CO2intensity. The integration of time-varying factors not only in the mechanical system evaluation but also in building design itself should be integrated to promote the regional transition to a decarbonized society.