低倍聚光型PV/T组件光伏光热性能的数值模拟  

Numerical Simulation on Photovoltaic and Thermal Performance of a Low Concentrated PV/T Component

作　　者：赵芳 沈菁菁 许诺 ZHAO Fang;SHEN Jingjing;XU Nuo(School of Urban Construction and Safety Engineering,Shanghai Institute of Technology,Shanghai 201418,China)

机构地区：[1]上海应用技术大学城市建设与安全工程学院,上海201418

出　　处：《应用技术学报》2022年第4期364-369,共6页Journal of Technology

基　　金：上海市科促会联盟计划项目(LM201866)资助。

摘　　要：为了有效预测低倍聚光式平板PV/T组件的光伏光热性能,对PV/T组件的传热过程建立数学模型;对光伏电池片表面温度及冷却流体的温度分布进行数值模拟;对PV/T组件光伏转换效率及太阳能综合利用性能进行研究。探讨了太阳辐射强度及冷却工质入口流速对光伏电池片温度分布以及电池片发电效率的影响。模拟结果表明,随着太阳辐射强度的增加,光伏电池片的表面温度逐渐升高,且发电效率逐渐减低。随着冷却工质入口流速的增加,对流换热增强,电池片表面温度逐渐降低,且温度分布趋于均匀,发电效率逐渐提升,PV/T组件的综合效率也显著提高。当工质入口流速大于0.2 m/s时,进一步增加工质流速对电池片的冷却效果比较微弱,因此对发电效率也不会产生显著影响。For effectively predicting heat transfer performance of a low concentrated photovoltaic and thermal(PV/T)component,a mathematical model was established for the heat transfer process of PV/T component in this paper.The temperature distributions of photovoltaic cells and cooling fluid were simulated numerically,and the photovoltaic conversion efficiency and comprehensive performance of solar were studied.The influences of solar radiation intensity and inlet velocity of cooling medium on temperature distribution and generating efficiency of photovoltaic cells were explored as well.The simulation results show that,with the increase of solar radiation intensity,the generating efficiency of photovoltaic cells decreases due to the gradual rise of their surface temperatures.While,when the inlet velocity of the cooling medium increases,the surface temperatures of photovoltaic cells gradually reduce because of enhancement of convective heat transfer process.Then the surface temperature distribution of cells tends to be uniform,the generating efficiency becomes higher,and the comprehensive efficiency of PV/T component is significantly improved.Moreover,when the inlet velocity of working medium is greater than 0.2 m/s,the cooling effect of further increasing inlet velocity on photovoltaic cells is relatively weak,so it will not have significant impacts on the power generation efficiency of PV/T component.

关 键 词：光伏光热一体化 传热 电效率 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]