超材料STPV系统结构设计及光谱调控

发布时间：2018-02-16 06:08

本文关键词： STPV系统结构设计性能优化选择性吸收器选择性辐射器选择性光子过滤器　出处：《哈尔滨工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：太阳能热光伏电池(STPV)系统是太阳能发电利用领域的又一热门研究对象,采用高性能光谱调控模块,将使之具有高能量转换效率,高功率密度等优点。本文将主要针对STPV系统的光谱调控模块,进行性能优化设计及分析,并基于该光谱调控模块对STPV电池系统优化设计,分析了面积比系数和几何聚光比对STPV系统性能的影响。具体研究内容包括以下几个方面:采用等效介质理论,对多层结构进行合理设计,并采用严格耦合波分析(RCWA)算法扫描计算多层结构的光谱特性曲线,分析其漫射特性以,并讨论结构层数、金属占空比以及顶层和底层宽度等参数对多层结构光谱性能的影响;结合等效介质理论和传递矩阵理论,研究了二维DSi-SiO2光子晶体的漫射特性,并讨论了掺杂硅掺杂浓度以及光子晶体结构高度和填充比等参数对其光谱性能的影响。采用传递矩阵理论,研究了一维Si-SiO2光子晶体和一维Ag-MgF2光子晶体的光谱性能,分析了它们的漫射特性,并讨论了两类光子晶体结构胞元数对其光谱特性曲线的影响。对两类光子晶体进行了修正,并分析了修正结构的有效透过系数和透过效率,通过比对分析修正结构的有效透过系数和透过效率,验证了半厚膜光子晶体结构的优越性。建立了太阳能热光伏电池系统的能量方程,分析了理想吸收光谱截断波长上限以及理想发射光谱截断波长下限对吸收器-辐射器温度、吸收器效率、电池效率以及系统总效率的影响,确定了最佳的理想吸收光谱截断波长上限以及理想发射光谱截断波长下限,为第二和第三章的光谱调控模块结构设计提供了参考。采用基于多层结构的吸收器和辐射器、一维Ag-SiO2光子晶体作为光子过滤器以及In GaAs Sb作为光伏电池,计算并对比分析了单位面积比系数和最优面积比系数条件下,辐射器/吸收器温度、吸收器效率、辐射器-光子过滤器效率、电池效率以及太阳能热光伏电池系统效率之间的差别,别给出了不同几何聚光比对应的系统输出功率曲线,验证了其高输出功率的优越性。
[Abstract]:Solar thermal photovoltaic cell (STPV) system is another hot research object in the field of solar power utilization. Using high performance spectral control module will make it have high energy conversion efficiency. This paper will focus on the spectral control module of STPV system, design and analyze the performance optimization, and optimize the design of STPV battery system based on the spectral control module. The effect of area ratio coefficient and geometric concentration ratio on the performance of STPV system is analyzed. The specific research contents include the following aspects: adopting the theory of equivalent medium, the multilayer structure is reasonably designed. The strict coupled wave analysis (RCWAA) algorithm is used to scan and calculate the spectral characteristics of multilayer structures, and the diffuse characteristics are analyzed. The effects of the parameters such as the number of layers, the duty cycle of metals and the width of top and bottom layers on the spectral properties of multilayer structures are discussed. Based on the equivalent medium theory and transfer matrix theory, the diffuse properties of two-dimensional DSi-SiO2 photonic crystals are studied. The effects of doping concentration, structure height and filling ratio of photonic crystals on their spectral properties are discussed. The spectral properties of one-dimensional Si-SiO2 photonic crystals and one-dimensional Ag-MgF2 photonic crystals are studied by using transfer matrix theory. Their diffuse properties are analyzed, and the effect of the number of cells of two kinds of photonic crystal structures on their spectral characteristic curves is discussed. The effective transmittance coefficient and transmission efficiency of the modified structure are also analyzed by modifying the two kinds of photonic crystals. By comparing and analyzing the effective transmission coefficient and transmission efficiency of the modified structure, the superiority of the semi-thick film photonic crystal structure is verified. The energy equation of the solar thermal photovoltaic cell system is established. The effects of the upper limit of the truncated wavelength of ideal absorption spectrum and the lower limit of truncated wavelength of ideal emission spectrum on the absorber-radiator temperature, absorber efficiency, battery efficiency and total system efficiency are analyzed. The optimal truncated wavelength upper limit of ideal absorption spectrum and the lower limit of truncated wavelength of ideal emission spectrum are determined, which provides a reference for the structure design of spectral control module in chapters 2 and 3. The absorber and radiator based on multilayer structure are adopted. One-dimensional Ag-SiO2 photonic crystal is used as photonic filter and in GaAs SB as photovoltaic cell. Under the condition of unit area ratio coefficient and optimum area ratio coefficient, the radiator / absorber temperature and absorber efficiency are calculated and compared. The differences among radiator photon filter efficiency, cell efficiency and solar thermal photovoltaic cell system efficiency are discussed. The system output power curves corresponding to different geometric condensing ratios are given, and the advantages of high output power are verified.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM914.4

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