基于光热性能的南向遮阳措施节能降耗模拟研究

采用模拟耦合计算室内照度与窗体能耗的方法,以上海为研究区域,针对朝南方向,分析了水平、垂直遮阳板以及卷帘等不同装置引起的照明能耗和制冷能耗之和,并由此评价其节能降耗的效果.结果表明,当灯具光效大于41.2 Lm/W时,遮阳卷帘引起的综合能耗较小;而当光效小于上述数值时,水平遮阳板更好.这两种遮阳措施下室内的照度分布相对...

Simulation to Energy-saving of Shading Devices for the South Orientation Based on the Daylighting and Heat-proof Performance

The energy-saving effect of horizontal and vertical shading devices and roller shade is estimated,according to both daylighting and heat-proof performance.Several fa?ade configurations were modeled in Shanghai for the south orientations.These simulations were performed by coupling a daylighting simulation tool and thermal simulation software.By calculating the sum of artificial lighting energy consumption and cooling energy consumption caused by window system,different kinds of shading devices in terms of their potential of energy-saving are compared.The simulation results indicate that,the roller shade or horizontal shading boards for the south orientation should be chosen according to the different luminous efficacy of light source.The critical value is 41.2 W/m2.Both of two kinds of shading devices can keep the indoor illumination level within the acceptable amount of window heat gain.However,vertical shading boards can result higher lighting or cooling energy consumption.Especially,vertical shading devices can not control the glare level in the room effectively.So we should avoid using them for the south windows.