建筑玻璃屋面喷雾遮阳及降温效果
Shading and cooling effects of spray on the surface of glass roof of building
摘要：
建立了雾粒遮阳及降温测试系统。对不同雾粒粒径、分布密度对太阳辐射的遮挡及对玻璃表面的降温效果进行了测试，结果表明，6种测试工况下的雾粒对太阳辐射的遮挡率为21.3%～38.5%，小粒径雾粒有更好的遮挡效果；在实验测试条件下，相同粒径雾粒分布密度每增加1倍，其遮挡率约增加8%；在太阳辐射照度为400～1 000 W/m2范围内，随着太阳辐射照度的增加，雾粒对太阳辐射的遮挡量及遮挡率均呈上升趋势；运行喷雾系统后，玻璃盖板内表面平均温度下降了约16 ℃，内表面温度最高值由60 ℃降至43.9 ℃。
Abstract：
Develops the experimental system of spray on the surface of glass roof. Tests the shading and cooling effects with different droplet sizes and distribution densities of micro-droplets. The results show that shading rate is between 21.3% and 38.5% under six test conditions. The smaller the size of micro-droplets is, the better the shading effect will be. The shading rate of same size micro-droplet is increased by 8% when the distribution density is doubled. When the solar radiation intensity ranges from 400 to 1 000 W/m2, both the shading amount and the shading rate increases with the increase of solar radiation intensity. The average temperature on inner surface of glass roof reduces by 16 ℃, and the peak temperature on inner surface of glass roof decreases from 60 ℃ to 43.9 ℃.
Keywords:glass roof, solar radiation intensity, spray, shading, cooling