将具有梯度角反射阵列的新型线性菲涅尔聚光器集成到太阳能聚光光伏系统中：实验与模拟研究

Abstract The uniform concentrating photovoltaic (CPV) technology is importance in renewable energy applications. Therefore, this study presents a CPV system utilizing a linear Fresnel reflector concentrator with gradient angle specular array (LFRC-GASA). A systematic comparison of the optical properties between novel LFRC-GASA technology and conventional parabolic trough concentrator (PTC) technology is conducted. The solar concentrating processes for both CPV systems are simulated using the Monte Carlo Ray Tracing method. Futhermore, small experimental prototypes are also constructed to enable a direct comparison of the optical properties and current–voltage (I–V) characteristics of the two CPV configurations. The results from both simulation and experimental analyses show that the solar cells in the proposed LFRC-GASA system achieve higher solar concentrating uniformity than PTC system. The solar-tracking accuracy analysis reveals that both LFRC-GASA and PTC systems maintain excellent normalized optical efficiency when the error angle remains below 0.3°. Notably, under these conditions, the LFRC-GASA system demonstrates superior solar concentration uniformity compared to the PTC system. The influence of structural parameters is also examined. The analysis indicates that the geometric concentrating ratio and ground utilization ratio increase with solar cell height but decrease with solar cell width. I-V characteristic measurements reveal higher energy conversion efficiency in the LFRC-GASA system (15.3 %) compared to the PTC system (11.6 %), which leads to a shorter investment payback period and a higher internal rate of return.