Study On The Main Structure Design And Dynamic Characteristics Of Parabolic Trough Collector

With the increasing demand for energy and environmental improvement,the development and utilization of clean energy has gradually become an important way for countries to change their energy structure.The development and research of clean energy is not only to protect the environment,but also to replace fossil energy as a major energy source in the future.Among these clean energy sources,solar energy is renewable and clean energy.Parabolic trough collector solar energy collection system as the receiving part,the characteristics of its own,the heat collecting efficiency is stable and efficient,relatively simple structure,less components of the system,but the general strength of each component is large,the installation accuracy is not high and difficult to install,small stiffness deformation.Because of the particularity of the working area of the collector and the interference of the external weather factors,the direct action of the atmospheric boundary layer on the collector is extremely unstable.If the collector can not resist the airflow,all the systems on the structure are easy to damage,the mirror surface is easy to deform and break,and the whole collector is easy to overturn and can not be repaired,and the loss is serious.At the same time,in order to obtain maximum economic benefits,it is necessary to maintain normal work under low intensity conditions,to ensure the stability of the structure and collector efficiency,so that the solar tracking system can work properly.Therefore,hoping to design a better structure of the collector structure.In this paper,a parabolic trough collector structure is taken as the object of study.The structure optimization design and finite element simulation technology are adopted to redesign the existing key structures.First of all,the influence of the position of the mirror pivot on the mirror mode is summarized,and the difference between the two support modes of the collector is compared.Secondly,the shape of the main supporting parts of the trough collector is optimized by topological optimization.The transmission tube is an important part of the collector efficiency of parabolic trough collector.In this paper,the size of the heat exchanger mirror set is determined by calculating the size of different transmission tubes.After the redesign of the main structure,the static comparison between the new design structure and the empirical design structure is carried out.Finally,the single collector unit and multi unit collector mirror group were carried out the modal analysis,the structure of a single unit and a plurality of unit dynamic characteristics are different,and the improvement of the new structure.