Investigation on intermittent tracking strategy and collecting solar radiation characteristic in whole daytime for nonimaging concentrator

Non-imaging concentrator is an important solar energy utilization mode. The conventional static non-imaging concentrator has small geometric concentrator, short effective working time and low heat collection temperature, which limits its large-scale industrial application. Therefore, the present research constructs a high-power concentrating solar energy CPC with intermittent tracking work, and explores the characteristics of its tracking strategy on solar radiation aggregation due to the CPC (Compound Parabolic Concentrator) without light escape. The experimental results demonstrate that the intermittent tracking strategy, based on the edge light theory, enables continuous, efficient, and reliable operation of CPC throughout the day. Moreover, it significantly enhances solar radiation collection performance compared to static CPC. The results show that compared with the standard CPC and the CPC without light escape of the same concentration ratio, the radiation collection amount is increased by 252.9 MJ/m2 and 272.4 MJ/m2 respectively, which has a potential engineering application prospect.