Design and performance characteristics of single-axis tracking dual confocal low-magnification parabolic trough CPV system

Keqin Huang, Xu Ji, Dingcheng Sun, Shan Lin, Yingxu Chen and Haiyang Xu

Renewable Energy, 2025, vol. 238, issue C

Abstract: With the rapid increase of PV module utilization, the environmental pollution associated with waste photovoltaic (PV) module and its recycling is of concern. This paper proposes a concentrating photovoltaic (CPV) system to reduce the use of PV module. The cross-confocal method is employed for the concentrator to eliminate central dark streaks. In optical simulation, a theoretical uniformity index of 0.0466 and a theoretical optical efficiency of 89.87 % were achieved. When the distance between the rotational axis and the center of gravity is less than 125.8 mm, the system can withstand winds of 20.4 m/s. The temperature range of the PV, obtained from finite element analysis, is from 295.71 K to 363.13 K. With the requirements of the relative optical efficiency of over 90 % and the uniformity index of less 0.5, the system has a dimensional translation tolerance of approximately ±10 mm, a dimensional rotation tolerance of about 5°, and a tracking angle tolerance of about 1°. The actual daily average output current of this system has increased by 100.91 %. The ratio between the increase ratio of output current and the theoretical concentration ratio is 83.4 %. The system demonstrates excellent optical performance and system tolerance.

Keywords: Two-stage bifocal paraboloid; Low-magnification CPV; Optical design and analysis; Single axis tracking; Heat transfer analysis; Wind resistance analysis (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:238:y:2025:i:c:s0960148124018482

DOI: 10.1016/j.renene.2024.121780

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