真空管吸收体非对称复合平面聚光器模型构建与聚能特性  

Modeling and Energy Concentration Characteristics of Asymmetric Multi⁃Section Compound Parabolic Concentrator with Vacuum Tube Absorber

作　　者：易云帆 郑灿阳 肖李业 戴鑫 陈飞[1,2] Yi Yunfan;Zheng Canyang;Xiao Liye;Dai Xin;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18期348-356,共9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：复合抛物面聚光器(CPC)具有无需跟踪装置、系统结构稳定、聚集直散辐射等特征。其中太阳能复合平面聚光器(M-CPC)还具有面形利用率高、工作时间长、制造成本低等优点。本文基于边缘光线原理和蒙特卡罗光线追迹法,成功构建了非对称结构的无漏光复合平面聚光器(N-CPC),随后从工程适用性的角度进一步设计了无光线逃逸的非对称复合平面聚光器(NM-CPC),并通过可视化激光实验验证了面形结构的可靠性。研究发现,相比于贝壳形复合抛物面聚光器(SS-CPC),NM-CPC的光学效率变化更加平缓;吸热面上能流密度分布更加均匀,高温点峰值能量更低;春季、秋季具有更好的辐射能收集量,分别为206 MJ和190 MJ。研究结果表明NM-CPC具有良好的聚能特性。Objective The compound parabolic concentrator(CPC)with asymmetric structures has the advantages of eliminating the shading phenomenon of array arrangement,reducing the center of gravity of the integrated system,and having small application site constraints.Additionally,the elimination of vacuum tube gap light leakage can recycle the light that should have escaped from the vacuum interlayer gap and improve the optical efficiency of the concentrator.Based on the existing no light escape CPCs(N-CPCs)with symmetric structures,we design a N-CPC with asymmetric structures,which further improves the optical efficiency of the shell-shaped CPC(SS-CPC)and eliminates the light leakage from its vacuum tube gap.However,the curved concentrating surface of the CPC results in uneven distribution of energy flow density on the heat-absorbing surface and thus a decrease in the efficiency of the photothermal/photovoltaic system,and is not conducive to long-term stable operation of the system.Meanwhile,the curved concentrating surface is expensive and difficult to transport and store,which is not favorable for realizing a wide range of applications.Thus,the construction of a concentrating surface composed of multiple planar mirrors can improve the inhomogeneous energy flow density distribution on the heat-absorbing surface,increase the operating time of the CPC,reduce the manufacturing cost of the concentrating surface,and improve the industrial application potential.Methods Based on the research results of the existing N-CPCs,we adopt the Monte Carlo ray tracing method and the principle of fringe ray,the geometric calculation method to derive the surface formula,and the design of the reflective surface to eliminate the light escape,and ultimately the mapping software to fit a novel N-CPC with asymmetric structures.Additionally,the 3D model of the concentrator is built to verify the existence of light escape via the optical simulation software.The no light escape multi-section CPC(NM-CPC)is constructed by screening the rotation angle

关 键 词：太阳能 非成像聚光器 非对称 平面化 效率 

分 类 号：O435.1[机械工程—光学工程]