根据部分工况的试验数据,通过均匀设计法和回归方程来得到全部工况的数据,以达到简化定日镜风洞试验、提高试验效率的目的,并在此基础上对定日镜群镜平均风力系数进行研究。首先,根据风洞试验得到群镜13个工况的平均风力系数值;其次,分别确定二元非线性回归方程,利用回归方程计算出全部工况下群镜的平均风力系数回归值;再次,通过对典型工况下平均风力系数进行研究得到其变化规律,并分析出全部工况下群镜平均风力系数整体的变化规律;最后得出群镜平均风力系数与单镜平均风力系数变化规律基本一致等相关结论。
Abstract
Data of all working conditions can be obtained by uniform design method and regression equations based on the test data of a few working conditions. This method can simplify the wind tunnel test of heliostats and improve the test efficiency. On the same time, the wind load coefficient variation law of heliostat group is obtained. Firstly, 13 different working conditions have been selected according to the uniform design method, and 13 different wind load coefficient values are obtained by the wind tunnel test. The binary nonlinear regression equations have been determined by using the Fall back method and the wind load coefficient variation law. Wind load coefficient regression values are calculated by regression equations. Wind load coefficient variation law under typical working conditions are obtained, and then the overall wind load coefficient variation law of heliostat group under all working conditions are analyzed. Finally it is concluded that the wind load coefficient of isolated heliostat and the wind load coefficient of heliostat group are basically consistent.
关键词
太阳能热发电 /
定日镜 /
受力测试 /
回归分析 /
风洞试验 /
均匀设计法 /
风力系数
Key words
solar thermal power generation /
heliostat /
force measurement /
regression analysis /
wind tunnel test /
uniform design method /
wind load coefficient
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] TRIEB F.Competitive solar thermal power stations until 2010-the challenge of market introduction[J]. Renewable energy, 2020, 19(1-2): 163-171.
[2] PFAHL A, BUSELMEIER M, ZASCHKE M.Determination of wind loads on heliostats[C]// Proceedings of the 17th SolarPACES Conference, Granada, Spain, 2011.
[3] EMES M J, GHANADI F, ARJOMANDI M, et al.Investigation of peak wind loads on tandem heliostats in stow position[J]. Renewable energy, 2018, 121: 548-558.
[4] PFAHL A.Wind loads on heliostats and photovoltaic trackers[D]. Eindhoven: Eindhoven University of Technology, 2018.
[5] EMES M J, JAFARI A, GHANADI F, et al.A method for the calculation of the design wind loads on heliostats[J]. AIP conference proceedings, 2019, 2126: 030020.
[6] JAFARI A, EMES M J, CAZZOLATO B, et al.An experimental investigation of unsteady pressure distribution on tandem heliostats[J]. AIP conference proceedings, 2020, 2303: 030022.
[7] 宫博. 定日镜和幕墙结构的抗风性能研究[D]. 长沙: 湖南大学, 2012.
GONG B.Wind resistence performance analysis on heliostat and curtain[D]. Changsha: Hunan University, 2012.
[8] 李正农, 吴卫祥, 梁笑寒, 等. 基于实测的塔式太阳能定日镜动力特性分析[J]. 太阳能学报, 2014, 35(11): 2133-2138.
LI Z N, WU W X, LIANG X H, et al.Dynamic characteristics analysis for a solar power tower heliostat based on the field measurements[J]. Acta energiae solaris sinica, 2014, 35(11): 2133-2138.
[9] 吴卫祥. 塔式太阳能热发电系统定日镜风压与干扰效应研究[D]. 长沙: 湖南大学, 2015.
WU W X.Wind pressure and interference effects study on heliostat of tower solar thermal power generation system[D]. Changsha: Hunan University, 2015.
[10] PFAHL A, COVENTRY J, ROGER M, et al.Progress in heliostat development[J]. Solar energy, 2017, 152: 3-37.
[11] 方开泰. 均匀设计:数论方法在试验设计的应用[J]. 应用数学学报, 1980, 3(4): 363-372.
FANG K T.The uniform design: application of number-theoretic methods in experimental design[J]. Acta mathematicae applicatae sinica, 1980, 3(4): 363-372.
[12] FANG K T, ZHENG H L.A new measure of uniformity-maximum symmetric difference[J]. Applying probability statistics, 1992, 8(1): 2-16.
[13] 方开泰. 均匀设计和均匀设计表[M]. 北京: 科学出版社, 1994: 13-18, 35-52, 73.
FANG K T.Uniform design and uniform design table[M]. Beijing: Science Press, 1994: 13-18, 35-52, 73.
[14] LIPPS F W, VANT-HULL L L. A cell-wise method for the optimization of large central receiver systems[J]. Solar energy, 1978, 20(6): 505-516.
[15] 田村幸雄. 风洞试验指南[M]. 北京: 中国建筑工业出版社, 2009: 15-29, 52-62.
TAMURA Y.The wind tunnel experiment guide[M]. Beijing: China Building Industry Press, 2009: 15-29, 52-62.
[16] HUANG B, LI Z N, ZHAO Z F, et al.Near-ground impurity-free wind and wind-driven sand of photovoltaic power stations in a desert area[J]. Journal of wind engineering and industrial aerodynamics, 2018, 179: 483-502.
[17] 丛顺, 李正农, 宫博, 等. 风沙流场特性及对建筑物影响的风洞试验研究[J]. 安全与环境学报, 2019, 19(6): 1989-2001.
CONG S, LI Z N, GONG B, et al.Wind tunnel test for the characteristic features of the wind with sand flowing current and its impact on the nearby building[J]. Journal of safety and environment, 2019, 19(6): 1989-2001.
[18] XIONG Q W, LI Z N, LUO H Y, et al.Wind tunnel test study on wind load coeffificients variation law of heliostat based on uniform design method[J]. Solar energy, 2019, 184: 209-229.
[19] PETERKA J A, DERICKSON R G.Wind load design methods for ground based heliostats and parabolic dish collectors[R]. NASA STi/Recon Technical Report N, 1992.
基金
国家自然科学基金（52178476; 51278190）; 湖南建工集团科技计划（2021JGJTK-20）
PDF(8034 KB)
