Shahrood University of Technology Renewable Energy Research and Applications 2717-252X 7 1 2026 01 01 Design and simulation of a photovoltaic-thermal hybrid system with a spectral filter for enhanced solar energy utilization 1 10 3891 10.22044/rera.2025.16443.1438 EN Qinghai Li Haidian District Tsinghua University Zijing departement, Beijing, China. A. Bourhani Said Haidian District Tsinghua University Zijing departement, Beijing, China. Yusen Yan Haidian District Tsinghua University Zijing departement, Beijing, China. Hui Zhou Haidian District Tsinghua University Zijing departement, Beijing, China. Yanguo Zhang Haidian District Tsinghua University Zijing departement, Beijing, China. Journal Article 2025 06 30 This study presents the design and simulation of a concentrating photovoltaic-thermal (CPVT) hybrid system that integrates spectral beam splitting (SBS) technology. The system utilizes conventional heliostat mirrors with dual-axis tracking to concentrate sunlight onto both a monocrystalline photovoltaic module and a thermal receiver. Nb<sub>2</sub>O<sub>5</sub>/SiO<sub>2</sub>/K<sub>9</sub> spectral filter, with high transmittance in the 580–1100 nm range, is used to separate high-energy photons for photovoltaic conversion and low-energy photons for thermal energy production. The optimal installation position and angle of the mirrors and components were determined, and simulations were conducted to assess the system’s performance. The proposed hybrid system achieved a photovoltaic electrical efficiency of 18.00%, a thermal efficiency of 34.29%, and an overall system electrical efficiency of 26.57%. These results highlight the effectiveness of both the spectral filter and the concentration system, positioning this hybrid solution as a promising approach to maximize solar energy utilization. Concentrating photovoltaic-thermal Spectral beam splitting Thermal receiver heliostat mirrors Electrical efficiency https://rera.shahroodut.ac.ir/article_3891_0c242fb313ac8bd5242315d5e1bdc0c3.pdf