通过结合选择性液体滤波器和相变材料实现CPV/T系统对全太阳光谱的充分利用

Abstract Effectively utilizing the solar spectrum in concentrated photovoltaic/thermal (CPV/T) systems remains challenging due to significant heat losses and insufficient thermal decoupling between PV cells and thermal absorbers. This study reports a novel bypass CPV/T design employing water as both a spectral liquid filter (SLF) and active coolant, paired with phase change materials (PCMs) for passive cooling. Through detailed three-dimensional computational fluid dynamics simulations, the overall performance of the hybrid CPV/T-PCM/SBS (spectral beam splitting) system is explored, and the key parameters to maximize the energy productivity and economic feasibility are determined. While a thicker SLF improves the heat recovery, the produced electricity is sacrificed owing to the reduced light transmission in the PV waveband. Conversely, a thinner SLF increases the electrical power but causes higher PV cell temperatures and reduced thermal gains. Balancing the SLF thickness and concentrating ratio ( CR ) is critical to enhance the system efficiency. For the designed module, the optimal design features an SLF thickness of 6.045 mm, a flow rate of 0.105 kg/s, and a PCM layer thickness of 28.266 mm at CR ∼ 20. Optimizing the optical characteristics of the SLF and the thermophysical properties of the PCM allows for maximizing the productivity of the CPV/T-PCM/SBS system, making it a promising solution for high concentrated solar applications with efficient energy generation and thermal management.