Document Type : Original Article

Authors

• QINGHAI Li ¹
• ABDALLAH BOURHANI SAID ²
• Yusen Yan ²
• Hui Zhou ²
• Yanguo Zhang ²

¹ Tsinghua University

² Beijing,Haidian District Tsinghua University Zijing departement

Abstract

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. Nb2O5/SiO2/K9 spec-

tral filter, with high transmittivity 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 obtained,

and simulations were carried out 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.

Keywords

• Concentrating photovoltaic-thermal
• Spectral beam splitting
• Thermal receiver
• heliostat mirrors
• Electrical efficiency

Main Subjects

• Photovoltaic Systems