Hybrid Refraction-Diffraction Optical Element of Side-Absorption Concentrated Array System for Photovoltaic-Thermal Hybrid Applications

The hybrid refraction-diffraction optical element (HRDOE) of the side-absorption concentrated array system (SCAS) for photovoltaic-thermal hybrid applications is carried out. In order to meet the requirements of spectral division for photovoltaic-thermal applications, thinner volume, light weight and wider acceptance angle, the proposed system integrates the HRDOE array and planar light-guide array. The functions of the HRDOE are to separate the visible and infrared spectra of the incident sunlight and to focus the separated beams. Those focal spots are on the corresponding micro-structure of planar light-guide array, while the beams are then directed to the side surfaces and received by the corresponding energy cells.