| 引用本文: | 钟杰,王久泉,戴靠山,杨子航,刘仰昭.考虑镜群遮挡效应的定日镜抗风可靠度评估方法[J].哈尔滨工业大学学报,2025,57(10):82.DOI:10.11918/202411091 |
| ZHONG Jie,WANG Jiuquan,DAI Kaoshan,YANG Zihang,LIU Yangzhao.Reliability evaluation method for wind-resistance of heliostats considering shielding effects of heliostat field[J].Journal of Harbin Institute of Technology,2025,57(10):82.DOI:10.11918/202411091 |
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| 考虑镜群遮挡效应的定日镜抗风可靠度评估方法 |
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钟杰1,2,王久泉1,2,戴靠山1,2,杨子航1,2,刘仰昭1,2
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(1.四川大学 建筑与环境学院,成都 610065;2.深地科学与工程教育部重点实验室(四川大学),成都 610065)
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| 摘要: |
| 定日镜作为塔式光热电站中的核心聚光元件,其抗风可靠性的准确评估对保障电站的正常、高效运行至关重要。为此,建立了考虑镜群遮挡效应的定日镜抗风可靠度评估方法。首先,开展定日镜镜场风洞测压试验,获得各定日镜风载体型系数,并以其空间变化衡量镜群遮挡效应；随后,结合随机风场模拟、有限元仿真和概率密度演化理论等,以定日镜镜面应力、变形及斜率误差等为响应指标,建立了考虑镜群遮挡效应的定日镜抗风可靠度评估方法；最后,以镜场中一组小型定日镜为例,考察了镜群遮挡效应、镜面俯仰角及风向角等参数对其抗风可靠度的影响。结果表明:镜场外侧定日镜的可靠度显著低于镜场内侧定日镜,且该组定日镜正面迎风时的可靠度高于背面迎风时的可靠度；对于镜场外侧的定日镜,其抗风可靠度随风向角和俯仰角的变化表现出明显的变化趋势,而内侧定日镜抗风可靠度随风向角和俯仰角的变化较小。 |
| 关键词: 定日镜 风洞试验 可靠度 概率密度演化 遮挡效应 |
| DOI：10.11918/202411091 |
| 分类号:TM615 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(52008274) |
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| Reliability evaluation method for wind-resistance of heliostats considering shielding effects of heliostat field |
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ZHONG Jie1,2,WANG Jiuquan1,2,DAI Kaoshan1,2,YANG Zihang1,2,LIU Yangzhao1,2
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(1.School of Architecture and Environment, Sichuan University, Chengdu 610065, China; 2.Key Laboratory of Deep Earth Science and Engineering(Sichuan University), Ministry of Education, Chengdu 610065, China)
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| Abstract: |
| Heliostats, as the core solar energy concentrating elements in tower solar thermal power plants, require accurate evaluation of the wind-resistance reliability to ensure safe and efficient operation of the power plants. To address this, a wind-resistance reliability evaluation method for heliostats considering the shielding effect of heliostat field is proposed. Firstly, wind tunnel pressure measurement tests were conducted on a heliostat field to obtain wind shape coefficients of the mirrors, and measure the shielding effects of the heliostat field based on its spatial variations. Subsequently, by combining random wind field simulation, finite element simulation, and probability density evolution theory, a wind-resistance reliability evaluation method for heliostats considering the shielding effects of heliostat field was established, with the mirror stress, deformation, and surface slope error as response indicators. Finally, taking a group of small heliostats in the heliostat field as an example, the influence of the shielding effects of the heliostat field, mirror pitch angle, wind direction angle and other parameters on its wind-resistance reliability was investigated. The results shows that the reliability of the helopstats on the outer side mirror of the heliostat field was significantly lower than that on the inner side. The reliability of the outer side was higher than when facing the wind compared to when facing away from it. In addition, for the heliostats on the outer side of the heliostat field, their reliability shows significant variations with changes in wind direction and pitch angle, whereas the reliability of the inner heliostats showed minimal variation with these parameters. |
| Key words: heliostats wind tunnel testing reliability probability density evolution shielding effect |
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