广州地区冷屋面和种植屋面隔热节能效果的对比测试研究

Comparison Measurement on the Heat-insulating and Energy-saving Effect of the Cool Roof and Planting Roof in Guangzhou

为研究冷屋面和种植屋面在广州地区的实际隔热和节能效果,选定广州市区某办公楼顶层3间相同条件的房间进行实测。测试结果表明,冷屋面和种植屋面均能有效降低屋面外表面温度,夏季9月份外表面最高温度分别最多可降低13.5℃和26.3℃,冷屋面可昼夜持续降温,而种植屋面外表面温度稳定;两者均能大大降低屋面内表面最高温度、温度振幅和热流密度,总的来说,种植屋面的隔热效果要优于冷屋面;两者平均日节电量分别为0.9 k W·h和1.2 k W·h,房间空调节能率分别为18.6%和23.9%,种植屋面节能效果优于冷屋面。

For research on the heat-insulating and energy-saving effect of the cool roof and planting roof in Guangzhou,three top rooms of an office building in Guangzhou were measured. The results show that in summer,both cool roof and planting roof could effectively reduce the temperature of roof top by 13. 5 ℃ and 26. 3 ℃ at most respectively. The cool roof could keep cooling the rooftop day and night,while the surface temperature of the planting roof was very steady. Both could reduce the maximum indoor temperature,temperature amplitude and thermal heat flux greatly. Generally,the heat-insulating effect of planting roof is better than cool roof. They reduced the daily power consumption by 0. 9 k W·h and 1. 2 k W·h respectively. So,the energy-saving effect of planting roof is better than cool roof.