Research On Heat Collecting System And Thermal Storage Auxiliary System Of Trough Solar Energy

Solar thermal power generation technology is a low-cost clean energy technology.It is a system that converts solar energy into heat energy and generates electricity through thermal power conversion process.Trough solar power generation is the most mature and least cost solar thermal power generation technology.In this paper,the slot collector is taken as the main research object,the solar astronomical relationship is studied,and the calculation method of solar position is given.In this paper,the calculation method of the tracking plane angle of the slot concentrator is given in order to require the minimum incidence angle of the solar light when the heat collecting field rotates to the minimum under the different arrangement of the rotating axis of the slot concentrator.The trough solar power station is generally composed of four parts: the concentrated light energy collection and energy supply subsystem,the energy storage subsystem,the auxiliary thermal energy supply subsystem and the power generation system.Trough-type thermal energy collecting and supplying subsystem is the core of the system and one of the most expensive systems in trough solar power plant.In this paper,the solar optical model,the heat transfer model of metal endothermic tube and the efficiency calculation model of the solar collector are established based on the study of the condensing process of the trough solar energy concentrator.The main factors affecting the outlet temperature of heat transfer fluid and the optical efficiency of the collector are analyzed.Thermal performance of trough solar collector Matlab software is used to simulate.Due to the instability of solar thermal power generation system due to weather,the output power of solar thermal power generation system fluctuates.In order to ensure the continuity of power generation and meet the power balance of the whole system,the regenerative system and the auxiliary thermal energy system are needed to replenish the energy.In this paper,two kinds of auxiliary thermal energy subsystems,biomass combustion thermal aid and biomass gasification gas thermal auxiliary,are presented,and the advantages of two auxiliary thermal energy systems are given.Finally,it is assumed that the three energy supply subsystems of the trough solar power station are in ideal working condition.From the point of view of power balance,the coordinated control of the system is studied.Control strategy,and system coordination control switching rules are given.