不同太阳波谱的聚光光伏系统冷却功率研究  

Research on Cooling Power of Concentrating Photovoltaic System With Different Solar Spectrum

作　　者：侯诗琪 李勇[1] 李德洪[2] HOU Shiqi;LI Yong;LI Dehong(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;China Helicopter Research&Development Institute,TianJin 300308,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]中国直升机设计研究所,天津300308

出　　处：《东北电力技术》2022年第8期10-15,共6页Northeast Electric Power Technology

摘　　要：当前高倍聚光光伏系统(CPV)的发电效率和功率仍受冷却条件限制。为实现光伏电池在低冷却热流密度条件下最大功率输出,提出通过光谱分频技术实现太阳波谱-发电效率-发电功率-冷却功率的匹配,首先基于光伏电池外量子效率,分析了不同太阳波谱分频后发电效率和发电功率的变化规律,然后搭建了基于微热管阵列冷却的光谱分频CPV试验系统,初步在400~700 nm和740~940 nm两段波谱进行了试验研究。结果表明,光伏电池在该两段波谱下发电功率相差不大,但400~700 nm波谱的发电效率比740~940 nm波谱小,后者最大接近23%,相比全光谱下的发电效率提高9%;400~700 nm波谱需要冷却功率为740~940 nm波谱的2倍。可见,通过光谱分频技术控制光伏电池接收太阳辐照的波谱段,可以降低CPV系统的冷却功率,能在相同冷却功率条件下实现系统更大的发电功率输出。At present,the electrical efficiency and power of a high concentrating photovoltaic system(CPV)are still associated with cooling conditions.To achieve the maximum power output of photovoltaic cells under the condition of low cooling heat flux,this paper proposes to realize the matching of the solar spectrum-power generation efficiency-power generation-cooling power by spectral splitting technology.Firstly,based on the external quantum efficiency(EQE)of photovoltaic cells,the variation laws of electrical efficiency and power after different solar spectral splitting are analyzed.Then,the spectral splitting CPV experimental system cooled by the micro-heat pipe array is built,and the preliminary experimental study is carried out on the spectra of 400~700 nm and 740~940 nm.The results indicate that the electrical power of the photovoltaic cell under these two two-period spectral is similar,but the electrical efficiency of the 400~700 nm spectrum is smaller than that of the 740~940 nm spectrum,and the latter is close to 23%at most,improved by 9.1%compared with the full spectrum.The cooling power of the 400~700 nm spectrum is twice that of the 740~940 nm spectrum.The result of the present work implied that the cooling power of the CPV system can be reduced by controlling the solar radiation spectrum of photovoltaic cells by spectral splitting technology,and the system can achieve greater electrical power at the same cooling power.

关 键 词：光谱分频 CPV 发电效率 发电功率 冷却功率 

分 类 号：TM615[电气工程—电力系统及自动化]