积尘对光伏光热系统性能影响的实验研究

Experimental study on the effect of dust on the performance of photovoltaic photothermal system

在自然积尘和清洁条件下,文章对2组光伏光热(PV/T)系统进行实验测试,分析了积尘对PV/T系统各项性能的影响。分析结果表明:与清洁状态相比,当PV/T组件盖板表面上的积尘密度为1.56 g/m2时,PV/T系统的光电效率、光热效率分别降低了11.15%,15.56%;在不考虑、考虑电能与热能能量品位差的条件下,PV/T系统的光电光热综合效率分别降低了14.17%,13.07%;PV/T系统的光电效率下降率、光热效率下降率以及综合效率下降率,均随着PV/T组件盖板表面上积尘密度的增大,而呈现出先迅速增大后增大趋势逐渐变缓的变化趋势,并且粘结形态的积尘对PV/T系统各项性能的影响大于松散形态的积尘。

In this paper,two groups of photovoltaic(PV/T)systems were tested under natural dust deposition and clean conditions,and the effects of dust deposition on the performance of PV/T systems were analyzed.The results show that:compared with the clean state,when the dust density on the surface of the PV/T module cover plate is 1.56 g/m2,the photoelectric efficiency and photothermal efficiency of the PV/T system are reduced by 11.15%and 15.56%,respectively.Without considering and considering the grade difference between electric energy and thermal energy,the photoelectric photothermal efficiency of PV/T system is reduced by 14.17%and 13.07%,respectively.With the increase of dust density on the surface of PV/T module cover plate,the decline rate of thermal efficiency and comprehensive efficiency showed a trend of rapid increase at first and then increase gradually,and the influence of adhesive dust on the performance of PV/T system was greater than that of loose form.