A pilot daylighting field study: Testing the usefulness of laboratory-derived luminance-based metrics for building design and control

Mahic Alen; Galicinao Kiara; Van Den Wymelenberg Kevin

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A pilot daylighting field study: Testing the usefulness of laboratory-derived luminance-based metrics for building design and control

机译：一项试验性的采光野外研究：测试基于实验室的基于亮度的度量标准对建筑设计和控制的有用性

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This paper. documents a field study that collected visual comfort feedback and High Dynamic Range (HDR) luminance maps to test the validity of laboratory-derived metrics in field settings. This study included 13 subjects for 149 daylighting evaluations. Similar to previous laboratory-based research, simple luminance-based metrics outperformed complex glare indicators in their predictive ability in this pilot field study. Also similar to lab studies, metrics derived using luminance data within the horizontal 40(circle) band of human vision and a mask of just the window represented the majority of the top 20 squared correlation coefficients, considering all questionnaire items. While standard deviation of window luminance, a highly predictive metric derived in a laboratory setting, did not maintain similar predictive ability in these field studies, the field study supported previous laboratory findings that this metric may be useful in discerning visual discomfort in spaces that are very dim. Two new metrics, the ratio of the 98th percentile to mean window luminance and the coefficient of variation (COV) of luminance in the horizontal 40(circle) band, yielded the strongest squared coefficients in field studies (adj(r2) = 0.35 and adj(r2) = 032 respectively). The COV 40(circle) band was more stable across multiple positions within a scene than other luminance-based methods. These findings suggest that some metrics are better suited for use within a single room over time (for purposes of dynamic daylighting scene control), whereas other metrics are better suited for evaluation between spaces and from alternate positions within a room (for purposes of design guidance). (C) 2016 Elsevier Ltd. All rights reserved.

机译：这篇报告。记录了一项现场研究，该研究收集了视觉舒适性反馈和高动态范围（HDR）亮度图，以测试在现场设置中实验室衍生指标的有效性。该研究包括13位受试者，进行149次采光评估。与以前的基于实验室的研究类似，在本试验研究中，基于亮度的简单度量的预测能力优于复杂的眩光指标。同样类似于实验室研究，考虑到所有调查表项目，使用人类视觉水平40（圆形）带内的亮度数据和仅窗口的遮罩得出的度量标准代表了前20个平方相关系数的大部分。尽管在这些现场研究中，窗口亮度的标准偏差（一种高度预测性的指标）在这些现场研究中并未保持类似的预测能力，但该现场研究支持了以前的实验室发现，即该指标可能有助于辨别空间非常大的空间中的视觉不适暗淡。两个新指标，即第98个百分位数与平均窗口亮度的比率以及水平40（圆形）波段中亮度的变化系数（COV），在现场研究中得出了最强的平方系数（adj（r2）= 0.35和adj （r2）= 032）。与其他基于亮度的方法相比，COV 40（圆圈）带在场景中的多个位置上更稳定。这些发现表明，某些度量标准更适合于随时间推移在单个房间内使用（出于动态采光场景控制的目的），而其他度量标准更适合于空间之间以及来自房间内其他位置的评估（出于设计指导目的））。（C）2016 Elsevier Ltd.保留所有权利。

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《Building and Environment》 |2017年第2期|78-91|共14页
作者
Mahic Alen; Galicinao Kiara; Van Den Wymelenberg Kevin;
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作者单位

Univ Oregon, Energy Studies Bldg Lab, Eugene, OR 97403 USA;

Univ Oregon, Energy Studies Bldg Lab, Eugene, OR 97403 USA;

Univ Oregon, Energy Studies Bldg Lab, Eugene, OR 97403 USA;

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原文格式 PDF
正文语种 eng
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关键词
Daylighting; Visual comfort; Discomfort glare; Daylight metrics;

机译：采光;视觉舒适;眩光不适;采光指标;

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A pilot daylighting field study: Testing the usefulness of laboratory-derived luminance-based metrics for building design and control

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