基于光热性能的西向锯齿窗优化策略研究

RESEARCH ON THE OPTIMIZATION STRATEGY OF WESTWARD SERR ATED WINDOW BASED ON PHOTOTHERMAL PERFORMANCE

西向房间因太阳辐射较大,不仅易产生室内眩光,且会升高室内温度,导致室内光热环境缺乏舒适性。通过案例分析得出锯齿窗是解决西向房间常见的设计策略,采用绿建斯维尔分析其采光和能耗,其中采光指标选取sDA和眩光指数(DGI)作为评估指标,能耗评估选取制冷能耗EUI作为评价指标。本研究主要进行两方面研究,一方面利用正交试验进行锯齿窗的光热敏感度分析得出窗台高度对s DA,眩光DGI和制冷能耗的影响均较低,而锯齿窗的转折角度对3个评价指标均有较高影响;另一方面发现单一锯齿窗能有效改善光环境,但对能耗优势不明显;最终通过组合窗的优化策略使光环境和制冷能耗均得到较大改善。

The west-facing rooms are often prone to indoor glare due to the greater solar radiation,and will increase the indoor temperature,resulting in a lack of comfort in the indoor light and heat environment;this paper concludes that the sawtooth windows are a common design strategy to solve the west-facing rooms through case studies,and uses green building swell to analyze its lighting and energy consumption,where the lighting index is selected as sDA and glare index(on the one hand,the orthogonal experiment is used to analyze the light and heat sensitivity of the sawtooth window,which shows that the height of the bay window has a low impact on sDA,glare DGI and cooling energy consumption,while the turning angle of the sawtooth window has a high impact on the three evaluation indicators;on the other hand,it is found that a single sawtooth window can effectively improve the light environment.Finally,the optimization strategy of combined windows can improve the light environment and cooling energy consumption.