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Type: Journal article
Title: A review of static and dynamic heliostat wind loads
Author: Emes, M.
Jafari, A.
Pfahl, A.
Coventry, J.
Arjomandi, M.
Citation: Solar Energy, 2021; 225:60-82
Publisher: Elsevier BV
Issue Date: 2021
ISSN: 0038-092X
Statement of
Matthew Emes, Azadeh Jafari, Andreas Pfahl, Joe Coventry, Maziar Arjomandi
Abstract: Accurate estimation of the static and dynamic wind loads on heliostats based on detailed measurement and characterisation of turbulence is crucial to avoid structural failure and reduce the cost of the structural heliostat components. Wind load predictions for heliostats are not specified in design standards for buildings because of a heliostat’s non-standard shape and the variations of wind velocity and turbulence in the lowest 10 m of the atmospheric boundary layer (ABL). This paper reviews the static and dynamic wind loads on heliostats in the most unfavourable operating and stow positions, with a focus on the aerodynamic effects related to the heliostat structural component geometry, turbulence parameters in the ABL and field spacing. An increased resolution of field-scale wind measurements at heliostat field sites is recommended to fully characterise the ABL turbulence, as the high-intensity gusts over shorter durations at heights below 10 m lead to high-amplitude displacements with larger frequencies than observed in standard building structures. Increased understanding and development of aerodynamic wind load predictions for heliostats, based on their critical scaling parameters and local wind conditions, would increase the accuracy of annual field efficiency models through an improved resolution of operating load data and reduce the capital cost of structural components in power tower plants.
Keywords: Heliostat; Wind load; Aerodynamics; Atmospheric boundary layer; Turbulence
Rights: © 2021 International Solar Energy Society. Published by Elsevier Ltd. All rights reserved.
DOI: 10.1016/j.solener.2021.07.014
Appears in Collections:Aurora harvest 8
Mechanical Engineering publications

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