摘要
太阳能热发电是高效利用太阳能资源的有效途径之一,对缓解能源危机和环境污染具有重要的推动作用和深远的社会意义。选择性吸收涂层是太阳能真空集热管的重要组成部分,是决定太阳能与热能转换效率的关键因素。针对高温状态下太阳能选择性吸收涂层光学性能的表征问题,提出一种适用于高温金属-陶瓷选择性吸收涂层太阳光谱吸收率的测量方法。基于双探测器的傅里叶光谱仪和具有涂层加热功能的积分球,研制了能够防止高温氧化并模拟涂层工作温度的高真空测量装置,实现0.3~2.5μm、室温-700℃太阳光谱吸收率的测量。选取磁控溅射制备的Mo-SiO_2选择性吸收涂层作为测量样品,该样品具有双吸收层的多层膜结构。对涂层样品不同温度下的太阳光谱吸收率进行了测量实验,室温测量值与理论计算值进行了对比分析,结果表明具有较好的一致性,最大偏差仅为2.9%,验证了涂层太阳光谱吸收率测量方法的可行性。高温光谱吸收率测量对涂层参数设计的优化及吸收性能的提高具有重要的指导意义及推动作用。
Solar thermal power generation is one of the effective ways to utilize solar energy.It plays an important role in alleviating energy crisis and environmental pollution and has far-reaching social significance.The selective absorption coating is an important part of solar collecting tube,and the key factor to determine the conversion efficiency of solar energy and heat energy.In order to characterize the optical properties of solar selective absorption coatings under high temperature conditions,a new method for measuring the spectral absorptivity of high temperature metal-ceramic selective absorption coatings was proposed.Based on Fourier spectrometer with double detector and integrating sphere with heating function,a high-vacuum measurement device was developed,which has the function of high temperature oxidation resistance and working temperature simulation.The Mo-SiO2 selective absorption coating with the typical double absorption layer,prepared by magnetron sputtering,was used as the sample for measurement.In addition,the solar spectral absorptivity of sample at different temperature was measured in the spectral range of 0.3-2.5μm and temperature range from room temperature to 700 ℃.Measurement values at the room temperature were compared to the values calculated from the effective medium theory and matrix formula,and results show a good consistency.Because the maximum deviation is only 2.9%,the feasibility of measurement method is verified.The measurement of high temperature spectral absorptivity has important guiding significance and promoting function for optimization of design parameters and enhancement of absorption performance.
作者
张宇峰
李明
戴景民
邵珠峰
吴元庆
ZHANG Yu-feng;LI Ming;DAI Jing-min;SHAO Zhu-feng;WU Yuan-qing(College of New Energy, Bohai University, Jinzhou 121013, China;School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2018年第6期1814-1818,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(61575029)
辽宁省科技厅博士启动基金项目(201501199)资助
关键词
太阳能选择性吸收涂层
高温光谱吸收率
积分球
测量装置
Solar energy selective absorption coating
High temperature and spectral absorptivity
Integrating sphere
Measurement device
