An experimental and numerical study of the gap effect on wind load on heliostat

Wu, Zhiyong; Gong, Bin; Wang, Zhifeng; Li, Zhengnong; Zang, Chuncheng

doi:10.1016/j.renene.2009.09.009

Cited by 72 publications

(37 citation statements)

References 7 publications

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“…The flow field distribution (Fig. 5) given by the CFD simulations is similar to the one observed in other CFD studies [3,12]. …”

Section: Variation Of Gap Width Validationsupporting

confidence: 85%

“…Even though wind tunnel tests are preferred for heliostat design, Computational Fluid Dynamics (CFD) provides valuable information for the design and optimization of a heliostat structure and can give a fairly good agreement with experimental results [3]. Moreover, it delivers a good representation of the flow field all around the models whilst wind tunnel tests are limited to measured data sets.…”

Section: Nomenclaturementioning

confidence: 99%

“…The current study investigated the possibility of altering the shape of the larger circulation bubble in the heliostat wake through the creation of smaller recirculation zones. Peterka and Derickson [6] as well as Wu et al [3] concluded that creating openings in the mirror area has a small effect on the wind loading if they represent less than 15% of the mirror area. However, there is no estimation in the open literature for greater gap areas which is the focus of this study.…”

Section: Nomenclaturementioning

confidence: 99%

“…Recent wind tunnel experiments show the beneficial effects of an individual porous wind protection device on a light-weight heliostat [1] and wind fences surrounding the field [2]. The effect of introducing gaps between the panels constituting the reflector has been addressed but only to a certain extent: small gaps along the two directions of the mirror [3] and one median wide gap along the heliostat chord direction [4].…”

Section: Introductionmentioning

confidence: 99%

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Influence of the gap size on the wind loading on heliostats

Poulain

Craig

Meyer

2016

AIP Conference Proceedings

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Abstract. Generally built in desert areas, heliostat fields undergo various wind loading conditions. An ANSYS Fluent CFD model of an isolated heliostat in worst-case orientation for the drag force is realized via numerical simulations using the realizable k-ε turbulence model. This paper focuses on the gap width between the panels and its influence on the wind loading that heliostats are subjected to. An atmospheric boundary layer profile is generated based on a wind tunnel experiment. For a heliostat in upright and tilted orientations with the wind angle being zero degrees, the gap width is varied and the force and moment coefficients are calculated. In the range tested, all the coefficients globally increase with the widening of the gaps.

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“…The flow field distribution (Fig. 5) given by the CFD simulations is similar to the one observed in other CFD studies [3,12]. …”

Section: Variation Of Gap Width Validationsupporting

confidence: 85%

Section: Nomenclaturementioning

confidence: 99%

Section: Nomenclaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the gap size on the wind loading on heliostats

Poulain

Craig

Meyer

2016

AIP Conference Proceedings

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“…Therefore, understanding the impacts of wind loads on the performance and reliability of heliostats is critical. Previous studies have focused on static wind loads using scaled models in wind-tunnel tests [3][4][5][6]. A few studies have evaluated dynamic effects (e.g., vortex shedding, vibrations) on heliostats or inclined flat plates, but nearly all of the published results have relied on small-scale models [5,[7][8][9][10].…”

Section: Heliostat Aerodynamic Assessmentmentioning

confidence: 99%

Sandia capabilities for the measurement, characterization, and analysis of heliostats for CSP.

Andraka¹,

Christian²,

Ghanbari³

et al. 2013

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The Concentrating Solar Technologies Organization at Sandia National Laboratories has a long history of performing important research, development, and testing that has enabled the Concentrating Solar Power Industry to deploy full-scale power plants. Sandia continues to pursue innovative CSP concepts with the goal of reducing the cost of CSP while improving efficiency and performance. In this pursuit, Sandia has developed many tools for the analysis of CSP performance. The following capabilities document highlights Sandia's extensive experience in the design, construction, and utilization of large-scale testing facilities for CSP and the tools that Sandia has created for the full characterization of heliostats. Sandia has extensive experience in using these tools to evaluate the performance of novel heliostat designs. 4This page intentionally left blank 5 CONTENTS

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Transient Evaluation of Wind‐Induced Vibration Response of Heliostat Under Downburst

Xing

et al. 2023

Energy Tech

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As the region with the highest amount of solar radiation, Qinghai–Tibet Plateau has the highest frequency of thunderstorms in China. Downburst generated in thunderstorm can cause high‐intensive wind near the ground, which is a critical threat to heliostats. Herein, the impact of the wind loads on the heliostat response under downburst is investigated using a proven finite‐element model and the influence is also compared with that under atmospheric boundary layer (ABL) wind. The results demonstrate that the downburst development process, the movement of the storm center, and the heliostat's elevation angle are highly associated with the wind‐induced response characteristics of the heliostat under downburst. The maximum displacement and stress of the heliostat with different elevation angles under the downburst are significantly larger than those under ABL wind. Additionally, when the elevation angle of the heliostat is 30°, the maximum value of the mirror's first principal stress under downburst is 1.88 times greater than it is under ABL wind. Therefore, the impact of wind‐induced vibration caused by downburst is necessarily considered on the safety of heliostat in Qinghai‐Tibet Plateau with abundant solar energy resources and high incidence of downbursts.

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An experimental and numerical study of the gap effect on wind load on heliostat

Cited by 72 publications

References 7 publications

Influence of the gap size on the wind loading on heliostats

Influence of the gap size on the wind loading on heliostats

Sandia capabilities for the measurement, characterization, and analysis of heliostats for CSP.

Transient Evaluation of Wind‐Induced Vibration Response of Heliostat Under Downburst

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