Integration Characteristics And Performance Evaiualion Of Coal Fired Power Plant Integrated With Simultaneous Integration Of Tower And Parabolic Trough Solar Energy Collectors

With the gradual shortage of traditional fossil energy and more and more serious environmental pollution,developing new renewable energy has become the research hotspot.In new renewable energy sources,solar energy has obvious advantages due to its huge reserve,convenient access and complete pollution-free compared with geothermal energy,tidal energy,biomass energy,nuclear energy and other energy types.In recent years,the research and utilization of solar energy has made great progress both at home and abroad.Thcre arc already some commercial operating solar power stations in some countries.And with the continuous innovation of technology,solar thermal power stations will gradually overcome its shortcomings of high cost,large investment,and low thermal efficiency,and will become an indispensable part of global energy utilization in the future around the world.Based on a 1000MW conventional coal-fired power plant in China,the trough solar collector subsystem and the tower solar collector subsystem are simutaniously integrated the benchmark system in this paper.The maximum share of solar collector coupling into a conventional unit under different operating conditions are determined by simulating the overall system with Ebsilon software.The thermodynamic performance of the integration system is further studied on the basis of calculating the largest solar energy integration share.Compared with conventional coal-fired power plant,the new solar-aided coal fired power plant system proposed in this paper has the advantages in terms of thermal efficiency and power generation cost.In this paper,the annual solar radiation parameters and meteorological data are selected in Yinchuan.The performance of the coal fired power plant with simultaneous integration with tower and parabolic trough solar energy collectors is analyzed.The percentage of solar energy power generation is clculated by using the exergy analysis method and the variation trend of solar energy exergy in the integration system is obtained.In order to maximize the use of solar energy,the coal tired power plant system with thermal energy storage system and the simultaneous integration of tower and parabolic trough solar energy collectors is proposed in this paper,which can improve the solar heat utilization,increase the system power generation,reduce the pollutant emission and extend the running time of the overall system.This paper analyzes the economic performance of the new integration system,the results show that the integration scheme of this paper is basically consistent with that of the solar power station under construction or in operation in the world.Compared with the conventional coal-fired power station,the power generation is increased.Therefore,the scheme has obvious thermal performance advantages.