Abstract
This study presents a misalignment light-guiding module to increase the effectiveness of absorbing light. For a general fixed-type photovoltaic (PV) panel, the misalignment light decreases the efficiency of the system. A solar tracking system was installed for obtaining higher power generation. However, the cost of the PV system and maintenance was 5–10 times higher than the general type. In this study, this module is composed of an array of misalignment light-guiding units that consist of a non-axisymmetric compound parabolic curve (NACPC) and a freeform surface collimator. The NACPC efficiently collects the misalignment light within ±30° and guides the light to the collimator. The light has a better uniformity and smaller angle at the exit aperture. The simulation results show that the optical efficiency of the unit was above 70% when the misalignment angle was smaller than 20°. The experimental results show that the power generation of the light-guiding unit was 1.8 times higher than the naked PV panel.
Highlights
In the last few decades, there were significant changes in the use of the world’s energy resources
The design basis of the non-axisymmetric compound parabolic curve (NACPC) came from the improvement of the compound parabolic curve (CPC)
The CPC was in the form of a shell with a thin film coating on the surface, where the surface resembled a mirror with total internal reflection
Summary
In the last few decades, there were significant changes in the use of the world’s energy resources. The solid CPC employs total internal reflection (TIR) and may have a potential high optical efficiency. There was no effect on the light entering the aperture of CPC.
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