泡沫玻璃外保温墙体窗口周边传热试验研究

Experimental study on heat transfer for foam glass exterior thermal insulation wall around windows

采用大型耐候性试验装置实测2种泡沫玻璃外保温墙体窗口周边的热流密度的结果表明,2种泡沫玻璃外保温墙体的窗口周边热流密度偏差"面砖系统"窗口周边达29.59%";涂料系统"窗口周边热流密度差达34.51%,传热不均匀性较大。当试验温差△t≤10℃时,窗口周边的传热能力相差近35%,热应力及其衍生问题不容忽视。因此,在外保温墙体窗户设计、施工、材料选用时,应尽量采用断桥窗框,降低热桥效应,提高节能效果。

By using the large-scale weathering test device, the distribution of heat flux for the two kinds of foam glass exterior thermal insulation wall is conducted. The results show that two kinds of foam glass insulation around the window wall have the heat flux difference, which for the ＂tile system＂ can reach 29.59% and the ＂coating system＂ can reach 34.51%. When experimental temperature differences △t≤10℃ ,its thermal conduction is unstable and heat transfer capability is greater than 35% ,thermal stress and its derivative problem can not be ignored. So when it comes to designing and construction the windows of exterior thermal insulation walls, the measure of separating the thermal bridge should be preferred to reduce the thermal bridge effect and improve the energy-saving effect.