Wind Load Similarity Relations for Parabolic Trough Collectors

被引:1
作者
Yang, Moucun [1 ]
Zhi, Liming [1 ]
Liu, Huan [2 ]
Zhu, Yuezhao [1 ]
Taylor, Robert A. [1 ,3 ]
机构
[1] Nanjing Tech Univ, Sch Mech & Power Engn, 30 Puzhu South Rd, Nanjing 211816, Peoples R China
[2] Jiangsu Vocat Coll Finance & Econ, Intelligent Mfg Training Ctr, 8 Meicheng East Rd, Huaian 211816, Peoples R China
[3] Univ New South Wales, Sch Mech & Mfg Engn, Sydney, NSW 2052, Australia
来源
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME | 2023年 / 145卷 / 03期
关键词
parabolic trough collector (PTC); similarity theory; wind loads; wind tunnel testing; solar collector; SOLAR-COLLECTOR; NUMERICAL-SIMULATION; ENGINEERING ANALYSIS; HEAT-TRANSFER; FLOW; OPTIMIZATION; FIELD; MODEL;
D O I
10.1115/1.4055602
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Large-scale parabolic trough collectors (PTCs) are generally installed in flat, open areas. Their specific costs ($/m(2)) are dependent on wind load-based structural design factors. To help estimate these wind loads, validated numerical simulations were used to develop similarity relations for large-scale PTCs. First, similarity relations of wind pressure, force, and lift/drag coefficients were deduced between a full-sized model (FM) and a scaled-down experimental similarity model. Second, the wind loads on the similarity model were simulated with a computational model to analyze the pressure distributions and aerodynamic performance under different wind speeds and pitch angles. Third, the computational method was extended to compute wind loads on a LS-2 collector (a commercial-scale PTC designed by LUZ International Ltd). The numerical results had a close agreement with the experiment results, on the whole, achieving a mean relative error in the drag coefficients of 5.1%, 3.8% in the lift coefficients and 5.0% in the moment coefficients, which indicated that the simulation model was valid. Further, compared with the shear stress transport model for the atmospheric boundary layer (ABL) along with large eddy simulations for the ABL, the k-e turbulence model has better accuracy. Finally, practical similarity equations were proposed which can be used to estimate the wind loads on a range of PTC designs in a wide range of conditions. The mean relative error of these practical similarity equations was found to be within 12.0%. Overall, this study reports a validated set of similarity equations that can be used to bypass costly numerical simulation and/or wind tunnel testing for the estimation of wind loads on the large-scale PTCs (e.g., the EuroTrough) installed in flat, open areas.
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页数:11
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