干旱区生态环境知识资源中心(Arid): Hinge and overturning moments due to unsteady heliostat pressure distributions in a turbulent atmospheric boundary layer

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DOI	10.1016/j.solener.2019.09.097
	Hinge and overturning moments due to unsteady heliostat pressure distributions in a turbulent atmospheric boundary layer
	Emes, Matthew J.; Jafari, Azadeh; Ghanadi, Farzin; Arjomandi, Maziar
通讯作者	Emes, Matthew J.
来源期刊	SOLAR ENERGY
ISSN	0038-092X
出版年	2019
卷号	193 页码:604-617
英文摘要	Non-uniform pressure distributions on the heliostat surface due to turbulence in the atmospheric boundary layer (ABL) have a significant impact on the maximum bending moments about the hinge of and pedestal base of a conventional pedestal-mounted heliostat. This paper correlates the movement of the centre of pressure due to the mean and peak pressure distributions with the hinge and overturning moment coefficients using high-frequency pressure and force measurements on a scale-model heliostat within two simulated ABLs generated in a wind tunnel. The positions of the centre of pressure were calculated for a range of heliostat elevation-azimuth configurations using a similar analogy to those in ASCE 7-02 for monoslope-roof buildings, ASCE 7.16 for rooftop solar panels, and in the literature on flat plates. It was found that the maximum hinge moment is strongly correlated to the centre of pressure movement from the heliostat central elevation axis. Application of stow and operating load coefficients to a full-scale 36 m(2) heliostat showed that the maximum hinge moment remains below the stow hinge moment at maximum operating design gust wind speeds of 29 m/s in a suburban terrain and 33 m/s in a desert terrain. The operating hinge moments at elevation angles above 45 degrees are less than 60% of the stow loads with a constant 40 m/s design wind speed. The results in the current study can be used to determine heliostat configurations and appropriate design wind speeds in different terrains leading to the maximum design wind loads on the elevation drive and foundation.
英文关键词	Heliostat Hinge moment Overturning moment Pressure distribution Centre of pressure Turbulence
类型	Article
语种	英语
国家	Australia
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000498747800060
WOS关键词	PEAK WIND LOADS ; FLAT PLATES ; COST
WOS类目	Energy & Fuels
WOS研究方向	Energy & Fuels
EI主题词	2019-11-15
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310869
作者单位	Univ Adelaide, Ctr Energy Technol, Sch Mech Engn, Adelaide, SA 5005, Australia
推荐引用方式 GB/T 7714	Emes, Matthew J.,Jafari, Azadeh,Ghanadi, Farzin,et al. Hinge and overturning moments due to unsteady heliostat pressure distributions in a turbulent atmospheric boundary layer[J],2019,193:604-617.
APA	Emes, Matthew J.,Jafari, Azadeh,Ghanadi, Farzin,&Arjomandi, Maziar.(2019).Hinge and overturning moments due to unsteady heliostat pressure distributions in a turbulent atmospheric boundary layer.SOLAR ENERGY,193,604-617.
MLA	Emes, Matthew J.,et al."Hinge and overturning moments due to unsteady heliostat pressure distributions in a turbulent atmospheric boundary layer".SOLAR ENERGY 193(2019):604-617.