基于动态采光评价的内遮阳调控策略分析

Internal Shading Control Based on Dynamic Daylight Evaluation

建筑遮阳是夏季隔热的有效措施,合理的遮阳既能减少空调和照明能耗,又能改善室内光环境。目前对遮阳的研究普遍集中在遮阳设施全部关闭或开启的情况,较少涉及遮阳的调控策略,同时也缺少相应的瞬态采光评价指标。提出了＂瞬时有效照度（IUDI）＂采光评价指标,采用Ecotect软件建模,并导入Radiance软件进行了模拟。结果表明：卷帘遮阳调控性能要优于百叶遮阳;瞬时有效照度（IUDI）可以直观地反映遮阳调控策略,其取值范围在300~1 000 lx较为合理,模拟得到的调控策略也更符合实际。

Architectural shading is an effective way to insulate heat in summer, for reasonable shading can not only reduce energy consumption of air conditioner and lighting tool, but also improve indoor lighting environment. Most previous studies focused on the situation of turning all the shading equipments off or on, which do not take control strategy of shading into consideration and lack index of instantaneous dynamic daylight evaluation accordingly. The index of daylight evaluation - Instantaneous Useful Daylight Illuminance （IUD1） was proposed and it was verified by simulation using Ecotect and Radiance software. The results revealed that the performance of roller in sunshade control was better than the louver. Besides, IUDI was an appropriate index to evaluate shading control strategy intuitively, and the control strategy got from simulation was more precise and practical when the threshold was between 300 and 1 000 lx than in other values.