天津地区双层透光薄膜光伏幕墙热工性能研究

STUDY OF THERMAL PERFORMANCE OF DOUBLE LAYERS TRANSLUCENT THIN FILM PV CURTAIN WALL IN TIANJIN

以天津地区为例,通过理论计算和Fluent软件模拟对适用于寒冷地区的双层封闭式和外呼吸式透光薄膜光伏幕墙的热工性能进行研究。结果表明双层透光薄膜光伏幕墙的空气间层厚度取0.15 m为宜;夏季工况下双层外呼吸式透光薄膜光伏幕墙的通风口竖向开口尺寸建议取0.25 m,此时通风所带走的热量最多,单位面宽下约为72.92 W。当内侧玻璃选用U值为2.8 W/（m^2·K）的中空玻璃时,空气间层大于等于0.15 m的双层封闭式和双层外呼吸式透光薄膜光伏幕墙的综合传热系数均小于1.4 W/（m^2·K）,满足《公共建筑节能设计标准》（GB 50189-2015）中天津地区最不利条件下的要求。

With the development of photovoltaic （PV） technology, translucent thin film PV curtain wall has drawn wide attention in the field of building envelope. Taking Tianjin as an example, the thermal performance of double-layer closed type and external respiration translucent thin film PV curtain wall in cold region was examined through theoretical calculation and Fluent software simulation. The results show that the appropriate thickness of the air layer between the double-layer translucent thin film PV curtain wall is 0.15 m. The appropriate size of vertical vent of double-layer external respiration type translucent thin film PV curtain wall in summer is 0.25 m. At this moment, the heat taken by the ventilation is the most, about 72.92 W for unit width. When insulating glass with U value of 2.8 W/（m^2 · K） is selected as the inner glass, the integrated heat transfer coefficient of the double-layer closed type and external respiration thin film PV curtain wall with an air layer equal to or greater than 0.15 m is less than 1.4 W/（m^2 · K） , which satisfies the requirements under the most unfavorable conditions in Tianjin in the ＂Energy Conservation Design Standards for Public Buildings＂ （GB 50189-2015）