热反射涂料在夏季非空调工况下的应用实测研究

Effects of Reflective Thermal Reflective Coatings for Non-Airconditioned Residential Buildings in Summer

热反射涂料涂覆于建筑屋顶,可减少从屋顶进入建筑物的热流,改善顶层房间热环境。本研究选取厦门市某居住建筑顶层的3个房间,在房间功能、空间布局、房间尺寸、围护结构以及朝向等均相同的条件下,分别涂覆白色、黄色、黑色3种太阳光反射比不同的涂料(反射比分别为0.79、0.57、0.05),测试其室内热环境参数。结果表明:在夏季非空调工况下,白色屋顶和黄色屋顶房间的平均室内空气温度较黑色屋顶低0.8℃和0.5℃,平均操作温度比黑色屋顶低0.9℃和0.5℃。同时,在采用热反射涂料后,白色和黄色屋顶房间的a PMV值(Adaptive Predicted Mean Vote)在1.4~1.5范围内分别增加2.2%和0.2%,在2.2~2.3范围内分别减少2.4%和2.0%。通过对比,在夏热冬暖地区,热反射涂料在夏季非空调工况下具有改善顶层室内热环境的作用。

The thermal reflective coatings applicable to top-floor room can reduce the heat from outdoors to indoors and improve the thermal environment. In order to study thermal environment of the thermal reflective coatings, three different types of coatings with their total solar reflectance having 0. 79,0. 57 and 0. 05 respectively） were applied on the surface of three identical roofs having the same functionality, space layout, area, structure and orientation in Xiamen. The results show that the average air temperature of the white roof and yellow roof can decrease 0. 8℃ and 0. 5℃ respectively as compared with black roof, and the average operat- ing temperature of white roof and yellow roof can decrease 0. 9℃ and 0. 5 ℃ respectively. In addition, the aPMV of the white roof and yellow roof can increase 2. 2% and 0. 2% respectively in the range of 1.4- 1.5 while decrease 2.4% and 2. 0% respectively in the range of 2. 2 2.3. It is indicated that the thermal reflective coatings for non-airconditioned residential buihtings in summer can improve the indoor thermal environment in zones featuring hot summer and warmer winter.