Numerical Simulation of Wind Pressure Coefficient and Distribution Trend of the Dust Concentration for Parabolic Trough Solar Collector

2017 International Conference on Environmental and Energy Engineering

生态环境科学;能源学

Zhao, Mingzhi^1 ; Zhang, Xu^1 ; Zhang, Xiaoming^2 ; Zou, Lulu^1 ; Kang, Xiaobo^1

School of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot

010051, China^1

College of Environmental and Energy Engineering, Beijing University of Technology, Beijing

100124, China^2

关键词: Attack angle;    Dust concentrations;    Dust particle;    Influence rule;    Minimum value;    Parabolic trough solar collectors;    Pressure coefficients;    Wind pressure coefficient;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/63/1/012009/pdf
DOI  :  10.1088/1755-1315/63/1/012009

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Analysis the influence rule of the changing wind angles on the distribution of the pressure coefficient at windward and lee side of collector, and adding the dust particles phase at the completion of the ideal air simulation, simulate the changing rule of the volume fraction of dust around the collector as the change of the attack angle. Under the speed of 10m/s, the conclusion of changing wind angles had no effect on the wind pressure coefficient of the value of windward, the maximum value range is 0.6-0.7 and the changing wind angles had a great effect on the wind pressure coefficient of the value of leeward, the minimum value range is -0.35 - 1.3 and the minimum value is -1.3 at collector angle θ=30°. When different angles, surface of the collector and the flow field around the dust volume fraction changes a lot, the volume fraction of dust is 2.56 times than the dust entrance at collector angle θ=0°; the volume fraction value significantly angle θ=±60°, its valume fraction is 1.4 times than dust entrance; in the rest of the angles, the volume fraction of collector surface is not much change, only slightly than the exit.