摘要
在近几年国际高温涂层研究的基础上,根据理论研究和实验结果从几方面因素(如材料、膜层结构、陶瓷中金属组分等)分析了其对高温吸收涂层效率的影响。在 Mo-Al_2O_3双吸收层涂层的基础上,利用计算机计算了金属体积分数配比和膜层厚度变化下整个涂层的吸收比和发射比,计算结果表明,膜厚和吸收层中 Mo 的体积分数对涂层的吸收比和发射比影响效果差异较大,选择合适的控制因子不仅可以提高涂层的吸收比(α=0.92～0.95),而且还能有效控制涂层的发射比(ε≤0.05)。
Since the low-medium temperature solar selective absorbers were developed and widely used, high-temperature solar absorber became the hotspot in this field, the prospect of which is of promise. This paper based on the recent research, where the influence of materials, film structure and metal volume fraction on the solar-thermal conversion efficiency was analyzed according to theoretical research and experiment result. The results of computer simulation of the double-layer Mo-Al2O3 absorber showed the influence of two important factors, metal volume fraction and layer depth, with different mechanisms on the optical performance of the double-layer Mo-Al2O3 cermets absorber, an optimization calculation yields a solar absorptance of 0.92- 0.95, while normal emittance at temperature of 350℃ was controlled below 0.05.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2008年第11期1353-1358,共6页
Acta Energiae Solaris Sinica
关键词
高温
选择性吸收涂层
计算机模拟
high temperature
selective solar absorber
computer simulation
