A method for creating maps of recommended window-to-wall ratios to assign appropriate default values in design performance modeling: A case study of a typical office building in Japan
A method for creating maps of recommended window-to-wall ratios to assign appropriate default values in design performance modeling: A case study of a typical office building in Japan
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DOI：
10.1016/j.enbuild.2017.04.028
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发表时间：
2017-06
影响因子：
6.7
通讯作者：
Liwei Wen;K. Hiyama;Makoto Koganei
中科院分区：
文献类型：
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作者：
Liwei Wen;K. Hiyama;Makoto Koganei
为了支持适当的默认值分配的设计性能建模（ESTA），这是定义为能源/性能模拟的概念和原理图阶段的设计过程中，一种方法来创建地图的建议的窗口-壁比（WWR）提出了使用集成的模拟和优化。一个案例研究进行创建地图的推荐WWR在日本。在不同的设计条件下，最优WWR的分布表现出三种不同的模式：（i）随着WWR的减少，CO2排放量减少。(ii)存在一个适当的WWR值（30-50%），在该值下，CO2排放量最小。(iii)随着WWR的增加，CO2排放量减少。本研究针对照明功率密度、气候、窗户朝向、内部增益及建筑规模等五个设计条件进行探讨。定量评估的结果表明，照明功率密度，气候和窗口的方向显着影响最佳WWR配置。根据最优WWR分布模式对4个主要方向的10个地点在两种照明功率密度（10 W/m2和5 W/m2）下的优化结果进行处理，以生成推荐的日本WWR地图。这些映射为架构师提供了确定默认WWR值的设置方向所需的信息。例如，对于日本气候区6-8区的建筑物，建议在当前照明功率密度（10 W/m2）下采用更大的WWR，东立面除外。相比之下，当照明效率提高时（即，对于5 W/m2的照明功率密度）。
To support the appropriate default value assignment in design performance modeling (DPM), which is defined as energy/performance simulations in the concept and schematic stages of the design process, a methodology for creating maps of the recommended window-to-wall ratio (WWR) is proposed using integrated simulations and optimizations. A case study is conducted to create maps of recommended WWR in Japan. The distribution of the optimal WWR under varying design conditions exhibits three distinct patterns: (i) As the WWR decreases, the CO2emissions decrease. (ii) An appropriate WWR value exists (30–50%) at which the CO2emissions are minimized. (iii) As the WWR increases, the CO2emissions decrease. Five design conditions of lighting power density, climate, window orientation, internal gains, and building scale are examined in this investigation. The results of the quantitative evaluation indicate that the lighting power density, climate, and window orientation significantly impact the optimal WWR configuration. The optimization results of 10 locations in four main orientations with two lighting power densities (10 W/m2and 5 W/m2) are processed according to the optimal WWR distribution patterns to generate the recommended WWR maps for Japan. The maps provide architects with the information needed to determine the setting direction of default WWR values for DPM. For example, a larger WWR is recommended for buildings in zones 6–8 of the Japanese climate regions for the current lighting power density (10 W/m2), except for eastern facades. In contrast, a moderate or smaller WWR default value should be carefully assigned according to the window orientation in zones 4–8 when the lighting efficiency improves (i.e., for a lighting power density of 5 W/m2).