天然采光模拟误差分析

天然采光模拟因其便捷快速且成本低的优势,成为目前建筑光环境设计的一种重要方式。结合照明模拟,合理地使用光环境模拟软件进行天然采光模拟,不仅能最大限度地利用自然光,同时能够节省照明成本,实现节能减排。天然采光模拟软件种类繁多,不同软件的设计原理、应用场景及面向的用户群体也有所区别,因此各类采光模拟软件在不同应用场景下会产生不同程度的误差,明确误差的大小及产生的原因,对于合理设计光环境至关重要。本文选取目前常用的三款采光模拟软件Desktop Radiance、Dialux和Ecotect,通过对比实地测量结果与采光模拟结果,研究天然采光模拟的误差大小,并根据软件的建模原理、模型材质处理、光源模型的不合理性以及软件算法的缺陷分析了误差产生的原因,并给出了在不同应用场景下的使用建议。

Error Analysis of Daylighting Simulation

Daylighting simulation has become an important way of designing architectural light environment due to its convenience,speed and low cost.Combined with illuminating simulation,reasonable use of light environment simulation software for daylighting simulation can not only maximize the use of natural light,but also save the cost of illuminating and achieve energy saving and emission reduction.There are many kinds of daylighting simulation software.The design principles,application scenarios and user groups of different softwares are also different.Therefore,various lighting simulation softwares will produce different degrees of error in different application scenarios.Defining the margin and cause of the error is critical to the proper design of the light environment.This article selects three lighting simulation softwares,Desktop Radiance,Dialux and Ecotect.By comparing the field measurement results with the lighting simulation results,the error of daylighting simulation is studied.According to the modeling principle of the software,the material processing of the model,the irrationality of the light source model and the defects of the software algorithm,the causes of the error are analyzed,and the suggestions for use in different application scenarios are given.