光谱分频型PV/T系统中纳米颗粒优化分析  

Optimization analysis of nanoparticles for spectral beam splitting hybrid PV/T system

作　　者：齐耀 刘子阳 侯宇田 于晓慧 杨宾[1] QI Yao;LIU Ziyang;HOU Yutian;YU Xiaohui;YANG Bin(College of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学能源与环境工程学院,天津300401

出　　处：《应用光学》2023年第4期699-710,共12页Journal of Applied Optics

基　　金：河北省自然科学基金(E2019202089);河北省青年科学基金(E2021202034);惠州市绿色能源与新材料研究所基金(KYXM-2022002)。

摘　　要：将纳米流体用于光谱分频(spectral beam splitting,SBS)型PV/T系统可提高系统效率,合适粒径的纳米颗粒(nanoparticles,NPs)能有效过滤光伏电池光谱响应外的太阳辐射。采用时域有限差分法(finite difference time domain,FDTD)模拟了Au、Ag、Cu、Fe_(3)O_(4)、ZnO、TiO_(2)六种NPs的光学特性,以单晶硅太阳能电池的光谱响应为例,研究了粒径为20 nm~200 nm六种NPs的光吸收性能,并将契合度作为评价指标优化粒径。结果表明:NPs的光学性质对其粒径大小非常敏感,通过改变NPs粒径,可在较宽范围内调节散射、吸收和消光峰位置,且其峰值均随粒径增大而增加。金属NPs对太阳辐射的吸收能力优于非金属NPs,6种NPs单位体积最大吸收功率分别为21.88 GW/m^(3)、17.95 GW/m^(3)、20.16 GW/m^(3)、2.54 GW/m^(3)、1.02 GW/m^(3)、0.27 GW/m^(3)。契合度指标分析表明,适用于SBS型PV/T系统的6种NPs的最优粒径分别为20 nm、50 nm、20 nm、170 nm、110 nm、20 nm。The application of nanofluids in spectral beam splitting(SBS)hybrid PV/T system can improve its efficiency,in which nanoparticles(NPs)with appropriate size can effectively filter solar radiation outside the spectral response of photovoltaic cells.The optical properties of Au,Ag,Cu,Fe_(3)O_(4),ZnO and TiO_(2)NPs were simulated by finite difference time domain(FDTD)method.Moreover,taking spectral response of monocrystalline silicon solar cells as example,the optical absorption properties of six NPs with diameters ranging from 20 nm to 200 nm were studied,and degree of appropriateness(DOA)was used as the evaluation index to optimize the particle size.The results show that the optical properties of NPs are very sensitive to their particle size.By changing the particle size of NPs,the positions of scattering,absorption and extinction peaks can be adjusted in a wide range,and the peaks increase with the increase of particle size.The absorption capacity of metal NPs to solar radiation is better than that of non-metal NPs.The maximum absorption power per unit volume of six NPs are 21.88 GW/m^(3),17.95 GW/m^(3),20.16 GW/m^(3),2.54 GW/m^(3),1.02 GW/m^(3),0.27 GW/m^(3),respectively.The DOA index analysis shows that the optimal particle sizes of six NPs suitable for SBS hybrid PV/T system are 20 nm,50 nm,20 nm,170 nm,110 nm,20 nm,respectively.

关 键 词：PV/T系统 纳米颗粒 时域有限差分法 契合度 粒径优化 

分 类 号：TN204[电子电信—物理电子学] TB34[一般工业技术—材料科学与工程]