Three-zone multifocus hybrid Fresnel lens concentrator
Applied Optics
|May 13, 2021
Summary
This study introduces a novel hybrid Fresnel lens concentrator using three prism types for uniform solar energy distribution. It achieves high concentration ratios and improved uniformity without a homogenizer.
Area of Science:
- Optics and Photonics
- Renewable Energy Technologies
- Solar Energy Concentration
Background:
- Solar concentrators are crucial for efficient solar energy conversion.
- Uniform irradiance distribution and minimizing hot spots are key challenges in Fresnel lens concentrators.
- Hybrid designs offer potential for enhanced optical performance.
Purpose of the Study:
- To design and analyze a three-zone multifocus hybrid Fresnel lens concentrator.
- To achieve uniform irradiance distribution without a homogenizer.
- To evaluate the optical performance, including concentration ratio, efficiency, and uniformity.
Main Methods:
- Designed a hybrid Fresnel lens using refractive, single total internal reflection (STIR), and double TIR (DTIR) prisms.
- Reconfigured the Fresnel lens by cutting and reconnecting its quadrants.
- Optimized edge ray angles to mitigate hot spot effects.
Main Results:
- Achieved a geometric concentration ratio of 2121X.
- Obtained an optical efficiency of 76.570% and an f-number of 0.441.
- Demonstrated a uniformity of 57.002% and a hot spot criteria of 1.369 with an acceptance angle of ±0.268°.
Conclusions:
- The designed three-zone multifocus hybrid Fresnel lens concentrator effectively achieves uniform irradiance distribution.
- The hybrid design incorporating different prism types and lens reconfiguration enhances performance.
- This concentrator shows significant potential for efficient solar energy applications.
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