有色ETFE薄膜光热性能试验研究  

Experimental Study on Photothermal Properties of Colored ETFE Foil

作　　者：代玖枚 周竞航 胡建辉[1] 赵兵[1] 陈务军[1] 任思杰 Jiumei Dai;Jinghang Zhou;Jianhui Hu;Bing Zhao;Wujun Chen;Sijie Ren(Space Structure Research Center of Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Haibo Membrane Structure Co.,Ltd.,Shanghai 200200,China)

机构地区：[1]上海交通大学空间结构研究中心,上海200240 [2]上海海勃膜结构有限公司,上海200200

出　　处：《钢结构（中英文）》2024年第2期43-49,共7页Steel Construction（Chinese & English）

摘　　要：为满足建筑设计要求,有色ETFE薄膜被研制并应用于现代大型公共建筑。然而,作为一种新材料,有色ETFE薄膜的性能研究相对有限,特别是ETFE薄膜典型的光热性能特征。从实际工程应用出发,代表性地以成都农博园所采用的9种有色ETFE薄膜和1种无色透明ETFE薄膜为试验对象,对其透光性能和热工性能进行试验测试。首先使用紫外–可见–近红外分光光度计测量试验薄膜在太阳辐射波段内的透射率和反射率,通过对比有色ETFE薄膜与无色透明ETFE薄膜太阳辐射曲线的走势和波动,分析了有色ETFE薄膜与无色透明ETFE薄膜的透光性能和热辐射性能在太阳光波段内的变化,计算并获得了试验薄膜的可见光透过率和太阳辐射系数。采用激光散射法测试试验薄膜的热传导性能,计算得到室温条件下试验薄膜的导热系数和热阻。总结不同颜色ETFE薄膜的光热性能参数变化规律,并与无色透明ETFE薄膜进行比较,结果发现:1)在紫外光区,有色ETFE薄膜的透射率和反射率均处于较低水平(合计不超过30%),有色ETFE薄膜对紫外线的吸收能力强,实际使用中应注意有色ETFE薄膜的老化问题。2)有色ETFE薄膜的可见光透过率和太阳辐射透射系数均低于无色透明ETFE薄膜,导热系数略低于无色透明ETFE薄膜,太阳辐射吸收系数及相同厚度下的薄膜热阻均大于无色透明ETFE薄膜。3)影响有色ETFE薄膜可见光透过率、太阳辐射系数的主要因素是薄膜颜色的深浅,薄膜颜色越浅,其可见光透过率越大,太阳辐射透射系数越大,吸收系数越小;随着薄膜颜色加深,薄膜对太阳光的吸收能力逐渐增加,透射系数和反射系数相对处于较低水平。4)影响有色ETFE薄膜热阻的主要因素是薄膜厚度;相同厚度下,有色ETFE薄膜热阻高出无色透明ETFE薄膜7%~14%。研究结果表明,使用有色ETFE薄膜作为建筑围护结构,能增加围护结构对太阳辐射的�To meet the requirements of architectural design,colored ETFE foils have been developed and applied to modern large public buildings.However,as a new material,research on the properties of colored ETFE foils is relatively limited,especially the typical photothermal properties of ETFE foils.Starting from practical engineering applications,nine kinds of colored ETFE foils and one kind of colorless transparent ETFE foil,which were used in the Chengdu Agricultural Expo Park as representative samples,were selected for experimental testing of their light transmittance and thermal properties.Firstly,a UV visible near-infrared spectrophotometer was used to measure the transmittance and reflectance of the test foil in the solar radiation band.By comparing the trend and fluctuation of the solar radiation curves between colored ETFE foils and colorless transparent ETFE foil,the changes in the light transmittance and thermal radiation property of colored ETFE foils and colorless transparent ETFE foil in the solar radiation band were analyze.The visible light transmittance and solar radiation coefficient of the test foil were calculated and obtained.The thermal conductivity property of the test foil was measured using laser scattering method,and the thermal conductivity coefficient and thermal resistance of the test foil at room temperature were calculated.The changes in photothermal property parameters of ETFE foils with different colors are summarized and compared them with colorless transparent ETFE foil.The results show that:1)in the ultraviolet region,both the transmittance and reflectance of colored ETFE foils are at a low level(not exceeding 30%in total),and colored ETFE foils have strong absorption capacity for ultraviolet rays.In practical use,attention should be paid to the aging problem of colored ETFE foils.2)The visible light transmittance and solar radiation transmission coefficient of colored ETFE foil are lower than those of colorless transparent ETFE foil,and the thermal conductivity is slightly lower than th

关 键 词：有色ETFE薄膜 透光性能 热工性能 

分 类 号：TU383[建筑科学—结构工程] TU111.4