Experimental and numerical analysis of the energy performance of building windows with solar NIR-driven plasmonic photothermal effects
Experimental and numerical analysis of the energy performance of building windows with solar NIR-driven plasmonic photothermal effects
复制标题
DOI：
10.1016/j.enconman.2021.114594
复制
发表时间：
2021-10
影响因子：
10.4
通讯作者：
Enhe Zhang;Qiuhua Duan;Julian Wang;Yuan Zhao;Yanxiao Feng
中科院分区：
文献类型：
--
作者：
Enhe Zhang;Qiuhua Duan;Julian Wang;Yuan Zhao;Yanxiao Feng
由金属纳米颗粒制成的薄膜可以在近红外光照射下表现出强烈的光热效应（PPE），为太阳红外调制的光谱选择性建筑窗户的新设计铺平了道路，该设计无需补偿可见光透射率。更重要的是，表面等离子体激元诱导的光热转换产生强烈的局部加热效应，其中导致衬底加热的部分小得多。将这种纳米级PPE应用于复杂建筑物开窗的设计中，本研究进行了全面的分析，以更好地了解PPE引起的加热效应以及窗玻璃表面与周围室内外环境之间的传导，对流和辐射热交换。作者首先开发并验证了一种数值分析方法，以结合光谱特征，太阳光谱辐照度和纳米级PPE。随后，使用所建立的数值方法，二维窗玻璃的温度分布和太阳能得热在不同的边界条件下产生。为了了解具有太阳近红外依赖PPE的窗户的能量性能，采用了一系列参数能量模拟。结果表明，光热涂料可作为一种新型的节能改造技术应用于单层窗，其采暖节能效果可达16.2%~ 20.8%，与双层窗的采暖节能效果相当。值得注意的是，这些节能并不是通过额外的层或绝缘材料来增加隔热性，而是通过玻璃材料的光谱选择性设计和太阳能近红外能量的利用来实现的。本工作提出了建筑尺度上的节能机制，由于纳米表面等离子体激元诱导的光热效应和相关的得热系数提高。它还为未来将这种新型纳米级现象集成到建筑围护结构系统中提供了基本参考。
Thin films made of metallic nanoparticles can exhibit strong photothermal effects (PPE) on near-infrared light irradiation, paving a way for new designs of spectrally selective building windows for solar infrared modulation that operates without the need to compensate for visible transmittance. More importantly, the surface plasmon-induced light-to-heat conversion creates strong localized heating effects with a much smaller fraction resulting in the heating of the substrate. Incorporating such nanoscale PPE into the design of complex building fenestrations, this research conducted a comprehensive analysis to better understand the PPE-induced heating effect and conductive, convective, and radiative heat exchanges between windowpane surfaces and the surrounding indoor and outdoor environments. The authors first developed and then validated a numerical analysis method to incorporate spectral features, solar spectral irradiance, and nanoscale PPE. Subsequently, using the established numerical method, two-dimensional windowpane temperature profiles and solar heat gains were yielded under different boundary conditions. To understand the energy performance of windows with solar near-infrared-dependent PPE, a series of parametric energy simulations was employed. The results show the photothermal coating can be used as a new energy-efficient retrofit technology for single-pane windows, with heating energy saving 16.2–20.8%, which performs similar to the double pane windows. Notably, these energy savings were not achieved by increasing the thermal insulation via additional layers or insulating materials, but rather by the spectrally selective design of glazing materials and utilization of solar near-infrared energy. This work presents the energy saving mechanism on an architectural scale due to the nanoscale surface plasmon-induced photothermal effect and associated heat gain coefficient enhancement. It also poses a fundamental reference for the future integration of this novel nanoscale phenomenon into the building envelope systems.