立体环境风下菲涅尔聚光光伏系统电输出特性  

Electrical Output Characteristics of Fresnel Concentrating Photovoltaic System Under Three-dimensional Ambient Wind

作　　者：吴双应[1] 段淑珍 肖兰[1] 陈志莉 WU Shuangying;DUAN Shuzhen;XIAO Lan;CHEN Zhili(Key Laboratory of Low-grade Energy Utilization Technologies and Systems(Chongqing University),Shapingba District,Chongqing 400044,China;School of Energy and Power Engineering,Chongqing University,Shapingba District,Chongqing 400044,China;College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541006,Guangxi Zhuang Autonomous Region,China)

机构地区：[1]低品位能源利用技术及系统教育部重点实验室(重庆大学),重庆市沙坪坝区400044 [2]重庆大学能源与动力工程学院,重庆市沙坪坝区400044 [3]桂林理工大学环境科学与工程学院,广西壮族自治区桂林市541006

出　　处：《中国电机工程学报》2023年第21期8309-8317,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51966003)。

摘　　要：研究聚光条件下实际环境风对系统性能的影响对聚光光伏系统的设计和运行具有重要的意义。针对线性菲涅尔聚光光伏系统,采用光–热–电耦合模拟方法,分析立体环境风的风速和风向角(包括入射角和偏向角)对系统电输出特性的影响。结果表明:随风速增加,平均电效率η_(el)上升,且不同光伏电池板倾角α下η_(el)差异性减小;风向角θ从15°增加到75°,环境风入射角减小,偏向角增大,两者共同作用导致在倾角α≤60°时,η_(el)先单调递增后单调递减,在θ=45°时达到最大,且风速较低时,η_(el)(θ=15°)>η_(el)(θ=75°),风速较高时则相反;在倾角75°时η_(el)表现为先升高后降低再升高的趋势,且风速大小不影响η_(el)的变化规律;随着倾角的增大,各倾角下最大平均电效率对应的偏向角和入射角也逐渐增大。研究结果从理论上揭示了立体环境风对菲涅尔聚光光伏系统电输出特性的影响机制和规律。Studying the effect of actual ambient wind on system performance under concentrating conditions is of great significance to the design and operation of concentrating photovoltaic systems.Aimed at the linear Fresnel concentrating photovoltaic(CPV)system,the optical-thermal-electrical coupling simulation method is used to analyze the influence of wind speed and wind direction angle(including wind incidence angle and wind yaw angle)of the three-dimensional ambient wind on the electrical output characteristics of system.The results show that the average electrical efficiency η_(el) of PV panel increases significantly with the wind speed,and the difference in ne decreases under different PV panel tilt angles.As wind direction angle increases from 15°to 75°,wind incidence angle decreases and wind yaw angle increases,which together lead to the variation in electrical output characteristics of system.That is,when tilt angleα<60°,ne first increases monotonically and then decreases monotonically,and reaches the maximum at-45°.For the low wind speed,nei(0-15°)>e(-75°),and the opposite is true when the wind speed is high.η_(el) shows a trend of first increasing,then decreasing and then increasing at tilt angleα=75°,and the wind speed does not affect the variation law of ne.At the same time,as the tilt angle increases,the wind yaw angle and wind incident angle corresponding to the maximum average electrical efficiency at each tilt angle also increase gradually.The research results theoretically reveal the influencing mechanism and law of three-dimensional ambient wind on the electrical outputcharacteristics of Fresnel CPV system.

关 键 词：聚光光伏系统 立体环境风 风速 风向角 电输出特性 

分 类 号：TK514[动力工程及工程热物理—热能工程]