一种考虑视觉舒适与节能的高层办公建筑遮阳系统——以深圳为例

A Sun-Shading System for High-Rise Office Buildings Considering Visual Comfort and Energy Saving: A case study of Shenzhen

制冷和照明能耗是热带与亚热带地区建筑能耗的重要构成,自然采光对建筑室内光热环境和人的健康有重要影响。外遮阳系统对降低建筑能耗和改善室内环境有重要作用。通过设计一种外遮阳系统,减少建筑能耗的同时改善室内光环境,以年度能耗、照度均匀度、眩光及有效照度比为评价指标,通过12种典型工况对比,探索外遮阳板的旋转角度、层数对建筑能耗和室内视觉舒适度的影响,并根据4种不同决策倾向得出综合最优方案。与无遮阳措施的对照组相比,综合最优方案可使室内平均照度从5694 lx降低至1239 lx,降低78.23%,室内内侧平均照度降低85.05%、室内照度偏方差降低68.84%、有效照度比提升36.00%,眩光指数降低48.50%,节能率达34.39%。

Cooling and lighting energy consumption are important components of building energy consumption in tropical and subtropical regions;the natural daylighting has the crucial impact on the indoor lighting environment, thermal environment and human health. External sun-shading system plays an important role in reducing building energy consumption and improving indoor environmental quality. The study aims to design an external sun-shading system, which can improve the indoor lighting environment while reducing the building energy consumption. Annual Energy Consumption, Indoor Illuminance Uniformity, Indoor Glare Condition and Effective Indoor Illuminance Ratio are selected as evaluation indexes, and the impact of the external sun-shading panels under different angles and number of layers on the Building Energy Consumption and Indoor Visual Comfort is explored by the comparison analysis of twelve typical working conditions, and comprehensive optimal solutions are determined according on four different decision-making tendencies. Compared with no sun-shading scheme, the optimal solution in this study can reduce the indoor average illuminance from 5694 lx to 1239 lx, with a reduction rate of 78.23%, the indoor inner average illuminance is reduced by 85.05%, the indoor illuminance deviation is reduced by 68.84%, the effective indoor illuminance ratio is increased by 36.00%, the glare index is reduced by 48.50%, and the energy-saving rate is 34.39%.