摘要
光谱分频型光伏/光热(CPV/T)复合技术利用分频器与光伏电池热解耦,避免了光伏电池超温和系统输出热能品位受限等问题。然而该领域的研究主要集中于模拟计算,缺乏在实际气象及光照条件下的热和电性能实验研究。为了探究户外CPV/T系统的真实运行性能,文章搭建了低倍聚光分频型CPV/T系统与非聚光PV系统,对比分析了聚光与非聚光条件下热和电的输出特性,探究了分频液光学特性对聚光分频型CPV/T系统热、电性能的影响。研究结果表明:与非聚光PV系统相比,分频型CPV/T系统的电输出功率更高,采用去离子水分频和银/水纳米流体分频时,电输出功率分别为79.7 W和72.9 W,而同条件下的非聚光PV系统的电输出功率仅为45 W;分频液体吸收特性强化后,电池温度降低,填充因子增大,电池性能提高,系统热效率提升了2.7%,但分频液吸收特性使得电池表面入射太阳辐射降低,导致系统总的电效率降低近0.6%。文章为低聚光倍数下的分频型CPV/T系统提供了实验数据支持。
In recent years,spectral crossover photovoltaic/thermal(CPV/T)composite technology has attracted much attention by decoupling the crossover from the heat of the PV cell and avoiding problems such as ultra-temperature of the PV cell and restricted taste of the system output thermal energy.However,the research in this field mainly focuses on simulation calculations and lacks experimental studies on thermal and electrical performance under actual meteorological and lighting conditions.In order to investigate the real operating performance of outdoor CPV/T systems,this paper builds a low-frequency concentrated light crossover CPV/T system and a nonconcentrated light PV system,and compares and analyses the thermal and electrical output characteristics under concentrated light and non-concentrated light conditions.The effects of the optical properties of the frequency-sharing liquid on the thermal and electrical performance of the concentrating-frequency-shared CPV/T system are further investigated.The results show that the frequency-divided CPV/T system has a higher electrical output power compared to the nonconcentrated PV system,with an electrical output power of 79.7 W and 72.9 W when using deionised water frequency-dividing and silver/water nanofluid frequency-dividing,respectively,compared to 45 W for the nonconcentrated PV system under the same conditions;meanwhile,after the frequency-dividing liquid absorption characteristics are strengthened,the temperature of the cell is lowered,the filling factor is enlarged,and the cell At the same time,after the enhancement of the crossover liquid absorption property,the cell temperature is reduced,the filling factor is increased,the cell performance is improved,and the thermal efficiency of the system is increased by 2.7%,but the crossover liquid absorption property reduces the incident solar irradiation on the surface of the cell,which results in the reduction of the total electrical efficiency of the system by nearly 0.6%.Experimental data support is provided for a crossover-type CPV/T system at low convergence multiples.
作者
刘冬雪
张险峰
孙天歌
赵志超
林建清
李文志
李英峰
巨星
Liu Dongxue;Zhang Xianfeng;Sun Tiange;Zhao Zhichao;Lin Jianqing;Li Wenzhi;Li Yingfeng;Ju Xing(Institute of Science and Technology,China Three Gorges Corporation,Beijing,100038,China;North China Electric Power University,Beijing 100096,China)
出处
《可再生能源》
北大核心
2025年第3期307-315,共9页
Renewable Energy Resources
基金
国家自然科学基金(51876062)
中国长江三峡集团有限公司科研项目(WWKY-2021-0173)。
关键词
光伏/光热发电
低倍聚光
光谱分频
纳米流体
photovoltaic/thermal(CPV/T)
low concentration
spectral beam splitting
nanofluid
作者简介
刘冬雪(1988-),女,博士,高级工程师,研究方向为光伏技术综合利用。E-mail:liu_dongxue@ctg.com.cn;通信作者:巨星(1982-),男,博士,教授,研究方向为光伏/光热复合技术、锂离子电池热管理与热安全防护等。E-mail:scottju@ncepu.edu.cn。
