A method for the calculation of the design wind loads on heliostats

SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems Pub Date : 2019-07-26 DOI:10.1063/1.5117532

M. Emes, A. Jafari, F. Ghanadi, M. Arjomandi

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引用次数: 7

Abstract

This experimental study outlines a method to calculate the design wind loads on heliostats, based on peak wind load coefficients reported in the heliostat literature and aerodynamic shape factors derived from high-frequency pressure measurements on an isolated heliostat at different elevation and azimuth angles in a boundary layer wind tunnel. The results show that the aerodynamic shape factors are largest for a range of heliostat configurations, including elevation angles of 15°, 30° and 45°and azimuth angles of 0° and 45°. The distribution of shape factors indicates that the leading edge of the heliostat is most vulnerable to wind-induced mirror damage in this range of critical elevation angles for heliostat design wind loads. The method proposed in the current study for heliostats conforms to the procedure used in design wind codes and standards for buildings and roof-mounted solar panels.This experimental study outlines a method to calculate the design wind loads on heliostats, based on peak wind load coefficients reported in the heliostat literature and aerodynamic shape factors derived from high-frequency pressure measurements on an isolated heliostat at different elevation and azimuth angles in a boundary layer wind tunnel. The results show that the aerodynamic shape factors are largest for a range of heliostat configurations, including elevation angles of 15°, 30° and 45°and azimuth angles of 0° and 45°. The distribution of shape factors indicates that the leading edge of the heliostat is most vulnerable to wind-induced mirror damage in this range of critical elevation angles for heliostat design wind loads. The method proposed in the current study for heliostats conforms to the procedure used in design wind codes and standards for buildings and roof-mounted solar panels.

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定日镜设计风荷载的计算方法

本实验研究概述了一种计算定日镜设计风荷载的方法，该方法基于定日镜文献中报道的峰值风荷载系数和边界层风洞中不同仰角和方位角的孤立定日镜高频压力测量得出的气动形状因子。结果表明，定日镜仰角为15°、30°和45°，方位角为0°和45°时，定日镜的气动外形因子最大。形状因子的分布表明，在定日镜设计风荷载的临界仰角范围内，定日镜前缘最容易受到风致镜损伤。目前研究中提出的定日镜的方法符合建筑和屋顶安装的太阳能电池板的设计风规范和标准中使用的程序。本实验研究概述了一种计算定日镜设计风荷载的方法，该方法基于定日镜文献中报道的峰值风荷载系数和边界层风洞中不同仰角和方位角的孤立定日镜高频压力测量得出的气动形状因子。结果表明，定日镜仰角为15°、30°和45°，方位角为0°和45°时，定日镜的气动外形因子最大。形状因子的分布表明，在定日镜设计风荷载的临界仰角范围内，定日镜前缘最容易受到风致镜损伤。目前研究中提出的定日镜的方法符合建筑和屋顶安装的太阳能电池板的设计风规范和标准中使用的程序。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems

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