东西向玻璃窗外遮阳优化研究

The Research of Optimization for East-west Sunshade of Window in Building

为了合理调节进入室内的太阳光线,减少空调能耗。创立了外遮阳百叶理论计算模型,得到了百叶下太阳阴影长度与其宽度、旋转角、太阳高度角等因素之间的关系。并以杭州某联合工房为例,建立了计算模拟模型,运用Ecotect软件模拟分析了在冬季工况下遮阳百叶不同旋转角和夏季工况下水平遮阳板不同长度并创新性的研究了在冬夏季时遮阳板开孔孔径对玻璃窗总辐射能的影响。结果表明:①冬季工况下,百叶倾斜角能有效的增加直射辐射量,但在30°至40°之间变化不明显;②夏季工况下,遮阳板1.8m时,能遮挡20%的直射辐射,当长度再增加时,效果不显著;③夏季,遮阳板孔径越小,遮阳效果越明显;冬季,孔径大小对遮阳板遮阳效果几乎没有影响。

In order to control reasonably the sun＇s rays entering indoor, and reduce the energy consumption of air conditioning. The mathematical model of the external blinds was established. The relationship between the length and width of the blinds shutter shade from the sun, the angle of rotation, the solar height angle and the solar azimuth was found. And taking a joint in Hangzhou as an example, the simulation model is established. Besides, the blinds under the condition of different rotation angle in winter, and in summer conditions the level of visor in different length, and visor of the total radiant energy during winter and summer were analyzed by the software simulation of Ecotect. The results showed that： @ In winter, the angle of shutter can effectively increase the direct radiation, but does not change clearly between 30 o to 40 o （~ In summer, it can decrease 20% of the direct radiation when the length of visor is 1.8 m, the effect is not clearly as the length increasing; （3） In summer, the smaller the hole diameter, the smaller of wall to accept direct solar radiation; In winter, there is no influence of the hole diameter on the wall acceptable of solar radiation.