基于W-SiO2双金属陶瓷结构的高效率太阳能选择性吸收薄膜的优化和制备
投稿时间:2020-04-24  修订日期:2020-06-16  点此下载全文
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作者单位E-mail
徐磊 复旦大学信息学院 17210720014@fudan.edu.cn 
陈良尧 复旦大学信息学院 lychen@fudan.ac.cn 
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:在理论优化的基础上成功制备了一种以W-SiO2双金属陶瓷作为吸收层的太阳能选择性吸收薄膜,在250-1500 nm宽光谱波段实现了高达95.3%的吸收率,并在在600 K温度下达到0.124的低热辐射率。该四层膜系结构简单,易于制备,有很强的实际运用前景。
中文关键词:太阳能选择性吸收薄膜  W-SiO2金属陶瓷  高太阳能吸收率  低热辐射率
 
Optimization and preparation of the high-efficiency solar selective absorber based on double W-SiO2 cermet layers
Abstract:To improve optical absorbance in the solar spectrum region as well as to reduce solar emittance in the infrared region, a new solar absorber structure based on the double W-SiO2 cermet layers was proposed and optimized. The factors which affect the spectral selectivity of the solar absorber such as the IR reflectance property of metal, and the volume fraction of the absorption layer were investigated. A series of W-SiO2 cermet films with different values of volume fraction were prepared onto Si and K9 glass substrates. The measured optical constants as well as those deduced from the data fitting were used as a database to optimize performance of the selective solar absorber. Based on the optimized parameters, the solar absorber structure with the layer parameter, consisting of that W (~150 nm) / W-SiO2 (94 nm, 0.67HVF) / W-SiO2 (34 nm, 0.27LVF) / SiO2 (47 nm), was fabricated using a magnetron sputtering system at room temperature. The experimental results agree well with the simulated ones, showing an average optical absorption of 95.3% in the wavelength region of 250-1500 nm, and a low thermal emittance of about 0.124 at 600 k in the broad wavelength region of 0.25-25 μm. Due to the simple components and high efficiency, the solar selective absorber based on the structures consisting of double W-SiO2 cermet layers shows a good potential for practical application in the future.
keywords:solar selective absorber, W-SiO2 cermet layer, high solar absorbance, low thermal emittance
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