Effect Of Wind On The Efficiency Of Trough Concentrating System

Solar thermal power generation has broad development prospects in China’s energy market due to its excellent power quality,continuous power generation,low manufacturing costs,and no pollution to the environment.Among many solar thermal power generation equipments,the manufacturing process of the trough-type thermal power generation system is relatively simple and the manufacturing cost is low.It is the most mainstream power generation equipment in the current thermal power stations.At present,there are few research achievements on the related technologies of trough-type CSP in China,and the design standards for the trough-type condenser under the natural environment in China are not mature.Among various environmental factors,wind has a significant effect on the light collection efficiency of the condenser.In order to ensure that the concentrator is produced under the specified wind speed with the concentrating efficiency within the standard range,and to ensure the safety and stability of the concentrator structure,it is very important to study the efficiency change of the wind-induced trough concentrator.Based on the theoretical support of computational fluid dynamics,structural strength theory,and Monte Carlo ray tracing method,the fluid,structure,and ray tracing analysis of the trough concentrator was carried out,and the wind pressure distribution on the mirror surface was obtained.And the trend of the light condensing efficiency of the mirror,and the in-depth analysis of the results of the simulation experiments.Firstly,in this research,the concentrator of the trough solar thermal power generation system is taken as the research object.Based on the existing parameters,the concentrator is three-dimensionally modeled.Based on computational fluid dynamics and near-earth wind theory,the size of the fluid domain was calculated and set in the Fluent software.The calculation model was meshed and the boundary conditions were set.The different work of the condenser was analyzed.The flow of the fluid near the angle and the wind pressure distribution on the surface of the condenser.Then,according to the change of the wind force of the condenser under different working angles,the best danger avoidance attitude and the most appropriate maintenance attitude of the condenser are obtained.Then use the data transmission interface between ANSYS and Fluent software to perform a unidirectional fluid-structure coupling analysis on the condenser,and pressure-transmit the surface wind pressure of the condenser analyzed by Fluent.Thecondenser performs a static structural analysis.Calculate the displacement deformation and equivalent stress distribution of the condenser under the effect of wind pressure,and finally obtain the change law of the displacement deformation and equivalent stress of the condenser under different wind speeds and different working angles.Analyze and evaluate its structural strength.Finally,the ray tracing software Trace Pro is used to calculate the specular concentration efficiency under different wind speeds and working angles.Obtain the changing law of the condenser efficiency of the condenser under different wind speeds and different working angles,analyze whether the working efficiency meets the requirements under the two conditions of the design work wind speed and outside,and correlate the efficiency change curve with the known change curve of other variables Sexual research.