An analysis of measured and simulated daylight illuminance and lighting savings in a daylit corridor
An analysis of measured and simulated daylight illuminance and lighting savings in a daylit corridor
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DOI：
10.1016/j.buildenv.2004.09.007
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发表时间：
2005-07
影响因子：
7.4
通讯作者：
D. Li;E. Tsang
中科院分区：
文献类型：
--
作者：
D. Li;E. Tsang
照明控制与采光相结合被认为是节能建筑设计和运营中重要而有用的策略。室内采光水平的预测是采光设计中的一个关键阶段。随着计算机技术的进步，日光照度的计算可以通过照明模拟程序进行。本文提出了一种利用RADIANCE照明软件模拟走廊室内自然光照度的日光系数（DC）方法。利用室内采光照度的实测数据与计算机模拟结果进行了比较。结果发现，直流法可以得到令人满意的结果，特别是对遮阳面和向阳面接收大量的直射阳光。此外，还结合测量的日光照度、调光比和电照明功率来模拟由光电传感器检测的日光照度，以预测照明节能。研究结果表明，测量和预测的数据显示出良好的协议时，大量的电力照明节省。讨论了造成差异的可能原因。
Lighting control integrated with daylighting is recognised as an important and useful strategy in energy-efficient building designs and operations. Prediction of the internal daylight levels is a key stage in daylighting designs. With the advances in computer technology, the computation of daylight illuminances can be conducted via lighting simulation program. This paper presents a study of the daylight coefficient (DC) approach using RADIANCE lighting software in simulating the indoor daylight illuminance of a corridor. The interior daylight illuminance data measured in the corridor were compared with the simulated results based on the computer software. It was found that the DC approach could give satisfactory results especially for the sun-shaded surface and sun-facing surface receiving a large amount of direct sunlight. Further, the daylight illuminance detected by the photosensor was also simulated in conjunction with measured daylight illuminance, dimming ratio and electric lighting power to predict the lighting energy savings. The findings suggested that the measured and predicted data showed a good agreement when large electric lighting savings resulted. The probable reasons causing the discrepancies were discussed.