Study of the wind-pressure distribution of flat-roof parabolic condensers based on wind-tunnel tests  

作　　者：Qiong Zou Xuan Zeng Chao Wang Yijun Shen 

机构地区：[1]College of Civil Engineering and Mechanics,Xiangtan University,Xiangtan,Hunan Province 411105,China [2]State Key Laboratory of Marine Resource Utilization in South China Sea,Hainan University,Haikou 570228,China

出　　处：《Clean Energy》2022年第6期893-906,共14页清洁能源（英文）

基　　金：supported by National Natural Science Foundation of China(grant number:51708478);the Natural Science Foundation of Hunan province(grant number:2020JJ5549);the State Key Laboratory of Marine Resource Utilization in South China Sea(MRUKF2021028).

摘　　要：The structure of parabolic condensers makes them susceptible to wind load because of their thin and large windward mirrors.In this paper,the wind pressure on a model of a condenser mirror(1:35)on multistorey flat roofs is analysed via pressure measurement in a wind tunnel.The mean wind-pressure distribution law of flat-roof condenser mirrors(including the change law with working conditions and the maximum distribution characteristics)and the distribution law of fluctuating and extreme wind pressure are obtained.Furthermore,by comparison with the ground-based condenser distribution law,similarities and differences between the two are obtained.Research results show that the wind-pressure distribution law of flat-roof parabolic condenser mirrors is the same as those on the ground,but the mean wind-pressure coefficient(absolute value)is generally~30%smaller.Furthermore,the maximum effect is generally located at the windward mirror edge and the mirror is more susceptible to wind pressure in wind directions of 30°and 135°-150°.The results of this study can provide a theoretical reference for wind-resistant structure design and multistorey flat-roof condenser-related research.

关 键 词：parabolic condenser flat roof of multistorey building wind-tunnel tests mean wind pressure fluctuating wind pressure extreme wind pressure concentrated solar energy 

分 类 号：TM615[电气工程—电力系统及自动化]