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Optimal curvature radius of cylindrical mirrors in linear Fresnel reflectors

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  • Ma, Jun
  • Liu, Fang
  • Liu, Chao
  • Wang, Rong-Ji
  • Wang, Cheng-Long

Abstract

The optical performance of linear Fresnel reflectors (LFRs) is heavily influenced by the curvature of their cylindrical mirrors. An innovative approach to calculating the optimal curvature radius of cylindrical mirrors in LFRs is introduced. Firstly, an optimization calculation method is proposed to determine the curvature radius of the cylindrical mirror. Then, a universal computational model for the curvature radius of cylindrical mirrors is established. Finally, a detailed analysis is conducted on the impact of optimizing the cylindrical mirrors on the optical performance of LFRs. Optical simulation results indicate that optimizing the curvature radius of the mirror significantly reduces the lateral drift of reflected rays. Increasing slope error, tracking error, and curvature radius error of the cylindrical mirrors result in decreased optical efficiency gain in the optimized LFR while improving uniformity. Furthermore, a larger transversal incidence angle yields a more pronounced improvement in the optimized gain, demonstrating a substantial enhancement in optical efficiency without compromising uniformity in LFRs. The average optical efficiency gain of the LFR is measured at 7.09 %, with an average uniformity loss of 2.10 % under all the studied conditions.

Suggested Citation

  • Ma, Jun & Liu, Fang & Liu, Chao & Wang, Rong-Ji & Wang, Cheng-Long, 2024. "Optimal curvature radius of cylindrical mirrors in linear Fresnel reflectors," Renewable Energy, Elsevier, vol. 229(C).
    • Handle: RePEc:eee:renene:v:229:y:2024:i:c:s096014812400778x
    DOI: 10.1016/j.renene.2024.120710
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    References listed on IDEAS

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