摘要
热致变色(Thermochromic,TC)窗是1种通过温度刺激调节太阳光直接透射比来实现建筑节能的有效技术。然而,玻璃对太阳光谱的不均匀透射与吸收会对建筑能耗及室内光热环境产生影响。本研究通过实验与模拟相结合的方式,基于日间动态辐射光谱,研究了3种应用于北京地区的TC窗在建筑能耗、热舒适以及室内动态采光效果等方面的性能。结果表明,TC窗的节能率可达8%,有效采光照度可提升15.9%,同时热不舒适时间可减少100 h以上。拥有高储热能力的水凝胶玻璃材料窗具有最佳节能潜力,且在北京地区其适用性最高。为继续提高TC窗的地区应用效果,建议进一步提高热致变色材料的转变温度和太阳能调制能力,降低发射率并加强可见光透光率的均匀性。本研究流程可用于光谱选择性窗户在不同气候区的评价与优化。
Thermochromic(TC) windows are an effective technology to achieve energy saving in buildings by adjusting the transmittance of solar radiation through temperature stimulation.However,the uneven transmission and absorption of the solar spectrum by glass will have an impact on building energy consumption and indoor light and heat environment.In this study,the energy consumption,thermal comfort and dynamic daylighting performances of three different TC windows in Beijing were studied based on the daytime dynamic radiation spectrum through experiments and simulations.The results show that the energy saving rate of the TC window can reach 8%,the effective lighting illuminance can be increased by 15.9%,and thermal discomfort time can be reduced by more than 100 hours.The hydrogel glass material window with high heat storage capacity has the best energy saving potential and the highest applicability in the Beijing area.In order to continue to improve the regional application effect of TC windows,it was recommended to further improve the transition temperature and solar energy modulation capability of thermochromic materials,reduce the emissivity,and enhance the uniformity of visible light transmittance.This research process can be used for the evaluation and optimization of spectrally selective windows in different climatic regions.
作者
李森渊
沈意
张严匀
彭晋卿
于彦霄
王斌
金璇
薛鹏
LI Senyuan;SHEN Yi;ZHANG Yanyun;PENG Jinqing;YU Yanxiao;WANG Bin;JIN Xuan;XUE Peng(Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology,Beijing University of Technology,Beijing 100044,China;Beijing Zhongxing Property Management Co.,Ltd.,State Grid Zhongxing Co.,Ltd.,Beijing 100761,China;School of Civil Engineering,Hunan University,Changsha 410082,Hunan,China;Baoding Architectural Design Institute Co.,Ltd.,Baoding 071066,Hebei,China;Beijing Capital Development Co.,Ltd.,Shoukai Zhixin Branch,Beijing 100020,China)
出处
《建筑科学》
CSCD
北大核心
2024年第6期175-183,共9页
Building Science
基金
首开集团“低碳建筑用全光谱调节智能窗的设计研发与性能优化研究”(2023110012000467)
重庆市自然科学基金“基于季节性“电光热色”需求的低辐射资源地区的光伏-变色窗系统低碳设计方法研究”(206220221222041)。
关键词
动态辐射光谱
热致变色窗
能耗
热舒适
UDI
dynamic radiation spectrum
thermochromic windows
energy consumption
thermal comfort
UDI
