Study Of Wind Resistant Performance Of Parabolic Condenser

Since the 21 st century, with the rapid development of economy and industrialization, environment protection and energy issues have become social concern. Being a new type of clean and sustainable energy, solar energy occupies a large proportion in the future energy structure of China. As professional mid-temperature solar thermal power system, Parabolic trough solar thermal power system was in large scale application in the developed countries with its irreplaceable advantages. The solar thermal power generation technology started relatively late in our country and few related researches were done, while the wind resistant standard was formulated in accordance with the landform environment and climatic conditions in the developed countries. It has become a urgent problem that how to solve the problem of keeping the condenser in correct working condition under a certain wind speed and ensuring the safety of the equipment under strong wind. Based on the computational fluid theory, the numerical simulation of the wind load on the condenser and the mechanical properties of the condenser are analyzed in this paper, using the parabolic concentrator as the research object. The following findings and conclusions are made:Firstly, taking a single parabolic trough concentrator as the research object, the CFD model is established and the boundary conditions are set up by using the knowledge of computational fluid dynamics. Then the different working conditions are simulated by Fluent software, analyzing the influence of pitch angle and azimuth angle on the flow field distribution and wind pressure distribution on the condenser. The safe position of condenser is determined and the influence of the separation gap on the wind load is discussed.Secondly, based on the analysis of a single condenser, the interference effect of the condensers group which is divided into three conditions is analyzed by establishing a numerical wind tunnel model. The influence of the pitch angle and the row space on the wind pressure distribution on the surface of the condenser are discussed. Then the flow field distribution, the distribution of wind pressure and the change regulation of the wind load are analyzed.Lastly, the structure design of the parabolic trough concentrator is carried out on the basis of the structure optimization principle. The topology optimization design of the bracket of the condenser is carried out by using HyperWorks. The mechanical properties of the plate steel bracket and section steel bracket are compared and the structure size of the bracket is optimized. Then, the wind resistance performance of the parabolic trough condenser is discussed.