针对Trombe墙存在夏季过热、冬季室内污染物易积累等问题,提出光热催化百叶型Trombe墙新系统,在冬季实现采暖和甲醛净化、夏季实现净化的同时,能将太阳辐射反射到室外,缓解室内过热。光热催化百叶能同时利用光能和热能驱动催化净化反应,还可产生协同效应来增强反应效率。首先探究不同比例的光热催化剂对甲醛降解性能的影响,并测试不同甲醛浓度、紫外辐照度和催化温度条件下的甲醛降解性能,揭示太阳辐射作用下的光热协同净化效应;然后搭建光热催化百叶型Trombe墙实验测试系统,探究不同太阳辐照度和百叶翻转角度下光热催化百叶型Trombe墙的热性能和甲醛降解性能。研究结果表明：光热催化剂比例为10%的光热复合催化剂的除醛效率最佳;太阳辐射使得光热复合催化剂的活化能降低了14.46%~31.25%,产生了光热协同效应;光热催化百叶型Trombe墙的采暖效率可达到46.21%,每小时产生的干净空气量（CADR）最大为81.47 m3/h,且墙体的采暖效率和甲醛净化效率均随太阳辐照度和百叶翻转角度的增大而增大。
Abstract
In order to solve the problems of overheating in summer and easy accumulation of indoor pollutants in winter, a new system of Trombe wall with photothermal catalyst purification blinds is proposed, which can realize heating and formaldehyde purification in winter and purification in summer, and at the same time, it can reflect solar radiation to the outside to alleviate indoor overheating. Photothermal catalytic blinds can simultaneously use light energy and heat energy to drive catalytic purification reaction, and can also produce synergistic effect to enhance reaction efficiency. First the influence of photo/thermal catalyst with different proportions on formaldehyde degradation performance was is explored, and the formaldehyde degradation performance is carried out under different formaldehyde concentration, UV irradiation intensity and catalytic temperature conditions, revealing the photothermal synergistic purification effect under solar radiation. Then an experimental test system for the Trombe wall with photothermal catalyst purification blinds is built to explore the thermal performance and formaldehyde degradation performance of the wall under different solar irradiation intensities and turning angles of blinds. The results show that the for maldehyde removal efficiency is the best when the proportion of photothermal catalyst was 10%. Solar radiation reduces the activation energy of the photothermal composite catalyst by 14.46%-31.25%, resulting in a photothermal synergistic effect. The heating efficiency of the Trombe wall with photothermal catalyst purification blinds can reach 46.21%, and the maximum CADR is 81.47 m3/h. Moreover, the heating efficiency and formaldehyde purification efficiency of the wall increase with the increase of solar irradiance and turning angles of blinds.
关键词
Trombe墙 /
百叶 /
采暖 /
净化 /
光热协同催化
Key words
Trombe wall /
blinds /
heating /
purification /
photothermal synergetic catalysis
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基金
国家自然科学基金（51908527; 52278111）; 江苏省自然科学基金面上项目（BK20221315）; 建筑节能安徽省工程技术中心开放课题 （AHJZJN-2021-03）
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