STUDY ON INFLUENCE OF WIND-INDUCED VIBRATION ON CONCENTRATING EFFICIENCY OF LARGE RECTANGULAR HELIOSTAT

Xing Guohua; Zhang Wen; Wu Yanru; Liu Yin; Miao Pengyong; Fan Tao

doi:10.19912/j.0254-0096.tynxb.2024-1545

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (10) : 360-368. DOI: 10.19912/j.0254-0096.tynxb.2024-1545

STUDY ON INFLUENCE OF WIND-INDUCED VIBRATION ON CONCENTRATING EFFICIENCY OF LARGE RECTANGULAR HELIOSTAT

Xing Guohua¹, Zhang Wen¹, Wu Yanru¹, Liu Yin¹, Miao Pengyong¹, Fan Tao²

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Abstract

Based on the theory of random sampling, a ray-tracing model for predicting the wind-induced vibration of the mirror surface and its concentrating distribution is developed. A transient multi-physics approach is employed, integrating the flow field, structure, and optics. The model takes the solar position, heliostat elevation angle, and azimuth angle as variables, and analyzes the variation in the concentrating distribution of the mirror surface under pulsating wind loads. Pulsation, time-history, and Gaussian characteristics of key physical quantities such as concentrating efficiency, net wind load, and mirror displacement are also examined. The results show that wind-induced vibrations cause the heliostat’s concentrating efficiency to decrease by 8.26% to 19.48%, with the maximum efficiency loss occurring at noon. For every 1 mm increase in mirror displacement, the concentrating efficiency loss increases by about 2.87%. As wind speed increases, the net wind pressure and mean displacement exhibit a positive correlation, while concentrating efficiency follows a negative correlation. The fluctuation patterns of net wind pressure, mean displacement, and mean concentrating efficiency display instantaneous synchronization.

Key words

solar energy / solar thermal power generation / heliostat / wind effects / ray tracing / concentrating efficiency

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Xing Guohua, Zhang Wen, Wu Yanru, Liu Yin, Miao Pengyong, Fan Tao. STUDY ON INFLUENCE OF WIND-INDUCED VIBRATION ON CONCENTRATING EFFICIENCY OF LARGE RECTANGULAR HELIOSTAT[J]. Acta Energiae Solaris Sinica. 2025, 46(10): 360-368 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1545

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