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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。
Building shade is an effective measure for heat insulation in summer. Reasonable shade can reduce the energy consumption of air conditioners and lighting and improve indoor light environment. At present, the study of sunshade generally focuses on the situation that the sunshade facilities are all closed or opened, and the sunshade control strategy is seldom involved. At the same time, the corresponding transient lighting evaluation index is also lacking. The “instantaneous effective illumination (IUDI)” daylighting evaluation index is proposed, which is modeled by Ecotect software and imported into Radiance software. The results show that the shutter shade control performance is better than that of the blinds. The instantaneous effective illuminance (IUDI) can intuitively reflect the sunshade control strategy, which is reasonable in the range of 300-1 000 lx, and the simulated control strategy is more realistic .