基于全等聚光面的面体分离型非成像聚光器性能  

Performance of Non-Imaging Condenser with Congruent Surface Separated from Absorber

作　　者：郑灿阳 肖李业 陈飞[1,2] Zheng Canyang;Xiao Liye;Chen Fei(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China;Institute of Solar Energy Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China)

机构地区：[1]昆明理工大学化学工程学院,云南昆明650500 [2]昆明理工大学太阳能工程研究所,云南昆明650500

出　　处：《光学学报》2024年第13期260-270,共11页Acta Optica Sinica

基　　金：国家自然科学基金(51866005);云南省“万人计划”青年拔尖人才专项(YNWR-QNBJ-2019-173)。

摘　　要：基于非成像光学原理,构建了一种与对应平板吸收体空间分离且具有全等面设计的复合平面聚光器(CSSACPC),并探究其聚能特征和光学性能。研究结果表明,CSSA-CPC能够持续稳定地收集太阳辐射,平均光学效率提升比在全等聚光面维数为4时达到最大,且其光学效率随聚光器长度的增加而上升,在CSSA-CPC的长度为2000 mm时光学效率可达92.90%。研究还发现,对于轴向东西倾斜放置的太阳能CSSA-CPC大规模阵列布局系统,优化设计的阵列单元间距为542 mm。Objective The total amount of solar radiation that reaches the earth surface is substantial with relatively low energy flux density, which is often insufficient to meet the energy utilization demand. As a typical non-imaging concentrator, since a compound parabolic concentrator(CPC) is a non-tracking device featuring a stable operation state and easy integration construction, it has many applications in solar thermal conversion and photovoltaic power generation systems. For traditional CPC, the concentrator is in contact with the absorber. In practical applications, the concentrator will be deformed or even destroyed due to the concentrated thermal stress, which can reduce the heat collection efficiency of the CPC and affect its working stability. To address this problem, we propose the separation of the concentrator surface and absorber CPC(SCSA-CPC). Nevertheless, SCSA-CPC inherits some disadvantages from traditional CPC such as uneven energy flux density and poor economic feasibility due to its parabolic structure. Therefore, we optimally construct a compound plane concentrator with a congruent surface separated from the absorber(CSSA-CPC) and investigate various factors influencing its optical efficiency.Methods Firstly, the points requiring further improvement for SCSA-CPC are identified, followed by an investigation and study of corresponding solutions. Based on the principle of non-imaging optics and program calculation methods,CSSA-CPCs with varying numbers of congruent concentrated surface segments are constructed. Secondly, to verify the concentrating performance of CSSA-CPC, we print the CSSA-CPC model with the melting sediment molding additive manufacturing technology. Additionally, an experimental platform of laser verification is established to simulate solar ray incidence by the CSSA-CPC optical aperture and record the position at which the laser reaches the plane absorber.Simultaneously, optical simulation software is employed to conduct ray tracing simulations and determine theoretical values for

关 键 词：光学器件 太阳能 复合抛物聚光器 全等聚光面 光学效率 聚光器长度 聚光器阵列 

分 类 号：O435.1[机械工程—光学工程]