Development and validation of a Radiance model for a translucent panel
Development and validation of a Radiance model for a translucent panel
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DOI：
10.1016/j.enbuild.2006.03.006
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发表时间：
2006-07
影响因子：
6.7
通讯作者：
C. Reinhart;M. Andersen
中科院分区：
文献类型：
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作者：
C. Reinhart;M. Andersen
本研究描述了一个半透明面板的辐射模型的开发和验证。使用测角光度计数据结合积分球测量，面板的光学特性被导出，并使用transs和transdata材料类型转换成辐射模型。Radiance模型在全尺寸测试室中进行了验证，该测试室的立面采用半透明面板材料。在24，000种天空条件下测量了超过120，000个桌面和天花板照度，并将其与使用Perez天空模型和基于辐射的日光系数方法的模拟结果进行了比较。总体平均偏差误差（MBE）低于9%，均方根误差（RMSE）低于19%，表明半透明材料可以在Radiance中建模，其准确度甚至高于塑料、金属和玻璃材料类型的早期验证研究。对结果的进一步分析表明，对于许多材料类型，动态辐射/佩雷斯/日光系数计算目前达到的±20%左右的精度足以满足实际设计考虑。描述了一个过程，显示了如何测角光度计和积分球测量可以用来准确地模拟任意半透明材料的辐射使用transdata功能文件。
This study describes the development and validation of a Radiance model for a translucent panel. Using goniophotometer data combined with integrating sphere measurements, optical properties of the panel were derived and converted into a Radiance model using the trans and transdata material types. The Radiance model was validated in a full-scale test room with a facade featuring the translucent panel material. Over 120,000 desktop and ceiling illuminances under 24,000 sky conditions were measured and compared to simulation results using the Perez sky model and a Radiance-based daylight coefficient approach. Overall mean bias errors (MBE) below 9% and root mean square errors (RMSE) below 19% demonstrate that translucent materials can be modeled in Radiance with an even higher accuracy than was demonstrated in earlier validation studies for the plastic, metal, and glass material types. Further analysis of results suggests that the accuracy of around ±20% currently reached by dynamic Radiance/Perez/daylight coefficient calculations for many material types is sufficient for practical design considerations. A procedure is described showing how goniophotometer and integrating sphere measurements can be used to accurately model arbitrary translucent materials in Radiance using transdata function files.