Mitigation versus adaptation: Does insulating dwellings increase overheating risk?
Mitigation versus adaptation: Does insulating dwellings increase overheating risk?
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DOI：
10.1016/j.buildenv.2018.07.033
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发表时间：
2018-10-01
影响因子：
7.4
通讯作者：
Ramaho-Gonzalez, Alfonso
中科院分区：
文献类型：
--
作者：
Fosas, Daniel;Coley, David A.;Ramaho-Gonzalez, Alfonso
鉴于气候变化对世界变暖的预测，人们越来越担心，旨在减少碳排放的以隔热为主导的建筑结构改进将加剧过热。如果属实，这将严重影响世界各地已转向加强隔热制度的建筑法规。尽管进行了广泛的研究，文献仍未能解决绝缘性能的争议，主要是由于范围不同且结果的可比性有限。我们通过精心构建的成对比较来解决这个问题，旨在隔离绝缘对过热的影响。我们涵盖了完整的相关变量范围：纬度、气候、隔热、热质量、玻璃比、遮阳、占用、渗透、通风、朝向和热舒适模型 - 创建了 576,000 种建筑变体。数据挖掘技术在一个新颖的框架中实施来分析这个大型数据集。为了提供信心，我们根据从隔热良好的住宅收集的数据对模型进行了验证。我们的结果表明，所有参数对过热风险都有显着影响。尽管根据其他参数的影响，绝缘可以减少和增加过热，但参数排名显示绝缘仅占总体过热响应的 5%。事实上，在尚未因不良设计而过热的情况下，总体趋势是增加隔热层以减少过热。这些结果表明，在过热水平可接受（低于 3.7%）的情况下，使用改进的隔热水平作为国家气候变化减缓政策的一部分不仅是明智的，而且有助于提供更好的室内热环境。
Given climate change predictions of a warmer world, there is growing concern that insulation-led improvements in building fabric aimed at reducing carbon emissions will exacerbate overheating. If true, this would seriously affect building regulations all over the world which have moved towards increased insulation regimes. Despite extensive research, the literature has failed to resolve the controversy of insulation performance, primarily due to varied scope and limited comparability of results.We approach this problem through carefully constructed pairwise comparisons designed to isolate the effect of insulation on overheating. We encompass the complete range of relevant variables: latitude, climate, insulation, thermal mass, glazing ratio, shading, occupancy, infiltration, ventilation, orientation, and thermal comfort models - creating 576,000 building variants. Data mining techniques are implemented in a novel framework to analyse this large dataset. To provide confidence, the modelling was validated against data collected from well-insulated dwellings.Our results demonstrate that all parameters have a significant impact on overheating risk. Although insulation is seen to both decrease and increase overheating, depending on the influence of other parameters, parameter ranking shows that insulation only accounts for up to 5% of overall overheating response. Indeed, in cases that are not already overheating through poor design, there is a strong overall tendency for increased insulation to reduce overheating. These results suggest that, in cases with acceptable overheating levels (below 3.7%), the use of improved insulation levels as part of a national climate change mitigation policy is not only sensible, but also helps deliver better indoor thermal environments.