基于动态辐射光谱的热致变色窗光热性能研究
Light and Thermal Performances of Thermochromic Windows Based on Dynamic Radiation Spectrum
李森渊 1沈意 2张严匀 1彭晋卿 3于彦霄 4王斌 5金璇 5薛鹏1
作者信息
- 1. 北京工业大学绿色建筑环境与节能技术北京市重点实验室,北京 100124
- 2. 国网中兴公司北京中兴物业管理有限公司,北京 100761
- 3. 湖南大学土木学院,湖南长沙 410082
- 4. 保定市建筑设计院有限公司,河北保定 071066
- 5. 北京首都开发股份有限公司首开志信分公司,北京 100020
- 折叠
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.
Abstract
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.
关键词
动态辐射光谱/热致变色窗/能耗/热舒适/UDIKey words
dynamic radiation spectrum/thermochromic windows/energy consumption/thermal comfort/UDI引用本文复制引用
基金项目
首开集团(2023110012000467)
重庆市自然科学基金(206220221222041)
出版年
2024
NETL
NSTL
万方数据