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Investigation of illuminance-based metrics in predicting occupants’ visual comfort (case study: Architecture design studios)
Solar Energy ( IF 6.0 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.solener.2019.12.051
Nastaran Seyed Shafavi , Mohammad Tahsildoost , Zahra S. Zomorodian

Abstract Daylight and glare metrics are useful to quantify visual performance, minimize visual discomfort, and promote energy savings. This study evaluates the performance and robustness of some dynamic and static daylight and glare metrics by field studies in twenty architectural studios, daylit by different strategies (i.e., skylight, clerestory, side-lit windows). Experimental datasets (measurements and questionnaire surveys) were collected from three universities during different months. The daylight and glare metrics were also calculated by simulation and compared to occupants’ responses and onsite measurement. Based on the results, the metrics are rated based on their consistency with occupants’ perception. Moreover, the acceptable thresholds of metrics, recommended by standards and experts, are investigated. Results show that occupants’ perceptions are correlated to Point-in-Time-Illuminance (EP), Spatial Daylight Autonomy (sDA), and Useful Daylight Illuminance (UDI) respectively, while no significant correlation has been observed between grid-based glare metrics and users’ responses. According to the results, among annual metrics, UDI300-3000/50% ≥ 75% and Annual Sunlight Exposure (ASE1000, 250h ≤ 10%) have better performance in predicting daylight availability and visual discomfort. Consequently, two simple indices (EDSDaylight and ESDGlare) are presented to predict daylight satisfaction and visual discomfort based on architectural parameters to be used in the early design stage.

中文翻译:

基于照度的指标在预测居住者视觉舒适度方面的研究(案例研究:建筑设计工作室)

摘要 日光和眩光指标可用于量化视觉性能、减少视觉不适和促进节能。本研究通过对 20 个建筑工作室的实地研究评估了一些动态和静态日光和眩光指标的性能和稳健性,这些工作室采用不同的策略(即天窗、天窗、侧光窗)进行采光。实验数据集(测量和问卷调查)是在不同月份从三所大学收集的。日光和眩光指标也通过模拟计算,并与居住者的反应和现场测量进行比较。根据结果​​,这些指标根据它们与居住者感知的一致性进行评级。此外,还研究了标准和专家推荐的可接受的指标阈值。结果表明,居住者的感知分别与时间点照度 (EP)、空间日光自主性 (sDA) 和有用日光照度 (UDI) 相关,而基于网格的眩光指标和用户的反应。结果表明,在年度指标中,UDI300-3000/50%≥75%和年度阳光照射(ASE1000,250h≤10%)在预测日光可用性和视觉不适方面有更好的表现。因此,提出了两个简单的指标(EDSDaylight 和 ESDGlare),以根据在早期设计阶段使用的建筑参数来预测日光满意度和视觉不适。而在基于网格的眩光指标和用户的反应之间没有观察到显着的相关性。结果表明,在年度指标中,UDI300-3000/50%≥75%和年度阳光照射(ASE1000,250h≤10%)在预测日光可用性和视觉不适方面有更好的表现。因此,提出了两个简单的指标(EDSDaylight 和 ESDGlare),以根据在早期设计阶段使用的建筑参数来预测日光满意度和视觉不适。而在基于网格的眩光指标和用户的反应之间没有观察到显着的相关性。结果表明,在年度指标中,UDI300-3000/50%≥75%和年度阳光照射(ASE1000,250h≤10%)在预测日光可用性和视觉不适方面有更好的表现。因此,提出了两个简单的指标(EDSDaylight 和 ESDGlare),以根据在早期设计阶段使用的建筑参数来预测日光满意度和视觉不适。
更新日期:2020-02-01
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