研究目的
Investigating the effects of thermal deformation of a silicone-on-glass (SOG) micro aspheric lens on the optical performance of a concentrator photovoltaic (CPV) module.
研究成果
The optical efficiencies at the design temperature of the micro aspheric lens were lower than those of the Fresnel lenses due to larger lens thickness. However, the temperature dependences of the optical efficiency and the irradiance uniformity on the cell surface of the SOG micro aspheric lens systems showed similar trends to those of the SOG Fresnel lens systems. These findings should serve as design guidelines for SOG micro aspheric lenses and contribute to the research and development of high-efficiency micro CPV.
研究不足
The study did not consider the deformation caused by mechanical sag of glass cover, which should be considered when designing a large-scale lens array. The simulation model should be upgraded to a practical module structure with a large number of cell–lens array and cell–lens alignment errors.
1：Experimental Design and Method Selection:
The study involved thermal deformation simulation and ray-tracing simulation to evaluate the effects of thermal deformation on optical efficiency and irradiance uniformity.
2：Sample Selection and Data Sources:
A prototype SOG lens and III–V triple-junction solar cell were used for indoor heating tests.
3：List of Experimental Equipment and Materials:
Commercial software packages (ANSYS
4：0 for thermal deformation simulation and LightTools 0 for ray-tracing simulation), a prototype SOG lens array, and a GaInP/GaInAs/Ge triple-junction cell. Experimental Procedures and Operational Workflow:
The lens was heated with a heat gun, and the temperature distribution was measured by thermography and K-type thermocouples. The short-circuit current of the triple-junction cell was measured at each lens temperature.
5：Data Analysis Methods:
The optical efficiency was calculated using the ratio of the measured short-circuit current of the triple-junction cell with the lens to that without the lens.
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