Weilin Li , Fa Yang , Huawei Niu , Luca Patruno , Xugang Hua
{"title":"Wind loads on heliostat tracker: A LES study on the role of geometrical details and the characteristics of near-ground turbulence","authors":"Weilin Li , Fa Yang , Huawei Niu , Luca Patruno , Xugang Hua","doi":"10.1016/j.solener.2024.113041","DOIUrl":null,"url":null,"abstract":"<div><div>The accurate evaluation of the operational and survival wind loads for ground-mounted heliostat trackers is vital for reducing the total cost during the life cycle of concentrated solar power plants. Current studies rely on reduced scale Wind Tunnel Tests (WTTs), which makes the investigation of the effects of supporting components and near-ground turbulence not trivial. As a result, there is an urgent need to develop complementary techniques to guide wind-resistant designs of commercial heliostats. In this paper, we investigate the performance of Large Eddy Simulations (LES) to systematically study the mean and peak wind loads over heliostats. The effects of elevation and azimuth angles, supports components, turbulence intensity and length scale are investigated. Results show that the proposed LES model accurately reproduces integral force coefficients and the local pressure distributions. Further, an accurate evaluation of the survival wind loads needs to consider the effects of supports components, as they contribute more than 50% to the mean lift and overturning moment in the stow positions. Finally, the effects of turbulence intensity and integral scale are clarified by considering eight different combinations of parameters to characterize the near-ground turbulence. This study provides useful guidelines for design wind loads and lays a solid foundation for LES of heliostat arrays.</div></div>","PeriodicalId":428,"journal":{"name":"Solar Energy","volume":"284 ","pages":"Article 113041"},"PeriodicalIF":6.0000,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solar Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0038092X24007369","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
The accurate evaluation of the operational and survival wind loads for ground-mounted heliostat trackers is vital for reducing the total cost during the life cycle of concentrated solar power plants. Current studies rely on reduced scale Wind Tunnel Tests (WTTs), which makes the investigation of the effects of supporting components and near-ground turbulence not trivial. As a result, there is an urgent need to develop complementary techniques to guide wind-resistant designs of commercial heliostats. In this paper, we investigate the performance of Large Eddy Simulations (LES) to systematically study the mean and peak wind loads over heliostats. The effects of elevation and azimuth angles, supports components, turbulence intensity and length scale are investigated. Results show that the proposed LES model accurately reproduces integral force coefficients and the local pressure distributions. Further, an accurate evaluation of the survival wind loads needs to consider the effects of supports components, as they contribute more than 50% to the mean lift and overturning moment in the stow positions. Finally, the effects of turbulence intensity and integral scale are clarified by considering eight different combinations of parameters to characterize the near-ground turbulence. This study provides useful guidelines for design wind loads and lays a solid foundation for LES of heliostat arrays.
准确评估地面定日镜跟踪器的运行和生存风载荷对于降低聚光太阳能发电站生命周期内的总成本至关重要。目前的研究依赖于小规模风洞试验(WTTs),这使得对支撑组件和近地湍流影响的研究变得非常困难。因此,迫切需要开发辅助技术来指导商用定日镜的抗风设计。在本文中,我们研究了大涡流模拟(LES)的性能,以系统地研究定日镜上的平均风荷载和峰值风荷载。研究了仰角和方位角、支持成分、湍流强度和长度尺度的影响。结果表明,所提出的 LES 模型准确地再现了积分力系数和局部压力分布。此外,对生存风荷载的准确评估需要考虑支架部件的影响,因为它们对收放位置的平均升力和倾覆力矩的贡献超过 50%。最后,通过考虑八种不同的参数组合来描述近地湍流的特征,澄清了湍流强度和积分尺度的影响。这项研究为设计风载荷提供了有用的指导,并为定日镜阵列的 LES 奠定了坚实的基础。
期刊介绍:
Solar Energy welcomes manuscripts presenting information not previously published in journals on any aspect of solar energy research, development, application, measurement or policy. The term "solar energy" in this context includes the indirect uses such as wind energy and biomass