Optimizing performance of the lightshelf by modifying ceiling geometry in highly luminous climates

被引：50

作者：

Freewan, A. A. ^{[1
]}

Shao, L. ^{[2
]}

Riffat, S. ^{[1
]}

机构：

[1] Univ Nottingham, Sch Built Environm, Nottingham NG7 2RD, England

[2] De Montfort Univ, IESD, Leicester LE1 9BH, Leics, England

来源：

SOLAR ENERGY | 2008年 / 82卷 / 04期

关键词：

lightshelf; illuminance level; uniformity;

D O I：

10.1016/j.solener.2007.08.003

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The impact of ceiling geometries on the performance of lightshelves was investigated using physical model experiments and radiance simulations. Illuminance level and distribution uniformity were assessed for a working plane in a large space located in sub-tropical climate regions where innovative systems for daylighting and shading are required. It was found that the performance of the lightshelf can be improved by changing the ceiling geometry; the illuminance level increased in the rear of the room and decreased in the front near the window compared to rooms having conventional horizontal ceilings. Moreover, greater uniformity was achieved throughout the room as a result of reducing the difference in the illuminance level between the front and rear of the room. Radiance simulation results were found to be in good agreement with physical model data obtained under a clear sky and high solar radiation. The best ceiling shape was found to be one that is curved in the front and rear of the room. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：343 / 353

页数：11

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