上海建筑各朝向外窗遮阳卷帘光热分析及优选

Daylighting and Thermal Analysis and Optimization of External Roller on Each Orientation of Building in Shanghai

为分析上海地区建筑外窗遮阳的采光、得热特性,本文建立上海地区遮阳建筑模拟分析模型,利用Energy-plus软件,分析不同透光、隔热性能的外遮阳卷帘对建筑各朝向房间的太阳辐射得热和建筑采光的影响;最后,分析了6种不同性能的外遮阳卷帘对各朝向照明能耗和空调能耗的影响;结果表明,东、南、西三个朝向采用外遮阳卷帘可以减小照明和空调综合能耗;而北向房间由于其太阳直射和散射的分布特点使得不同性能的遮阳卷帘下照明、空调综合能耗有增有减,其中使用中反射率中透过率卷帘的节能效果最明显;而使用低透过率的卷帘会使得房间综合能耗增加,尤其是低反射率低透过率的卷帘比无遮阳时多耗能12.3%。

To analyze the characteristics of day-lighting and heat gain of shaded external window in Shanghai, the simulated building model is established to analysis the impact of external roller on solar radiation heat gain and architectural lighting with software Energy-plus; Finally, the Energy-plus software was used to predict the energy consumption of a representative office module in order to evaluate the overall energy performance of both lighting and air-conditioning when employing external roller on the south, north, east and west oriented facades; The results show that, the use of external roller blind can reduce overall energy consumption of lighting and air conditioning in east, south and west rooms; however, overall energy consumption in the north increases or decreases with the properties of the roller, due to the distribution characteristics of the direct and diffuse solar radiation, the using of external roller of medium-reflectivity and medium-transmittance is most energy-saving; the use of low-transmittance roller will increase the overall energy consumption, energy-consuming is 12.3% higher than bare window when the low-reflectivity and low-transmittance roller is used.