Analysis Of Thermal Performance And Operation Regulation Of Integrated Solar Combined Cycle System

The solar energy application is various.Based on solar thermal power generation technology,this paper investigated the development of solar thermal power generation technology at home and abroad,summarized the research status of solar thermal power generation technology,the direction of solar thermal utilization technology,the depth and the advantages and disadvantages of solar thermal power generation systems which proposed by others.Through the review of domestic and foreign research literatures,there are many basic and experimental researches on pure solar thermal power generation technology.The pure solar thermal power station can realize solar power generation,which do not need to consume traditional fossil energy,and achieve the destination of zero pollution discharge,it is a true clean power station.However,pure solar power generation is greatly affected by changes in solar radiation,on rainy days and nights,solar thermal power stations will suspend power generation,which makes solar power generation have the disadvantage of intermittent and unstable.Some researchers have added a heat storage system module to the pure solar thermal power station,but at the same time increased the cost of solar power generation,which hindered its development to some extent.In view of the shortcomings of the above pure solar power station,this paper studied an Integrated Solar Combined Cycle system(ISCCs)that is different from traditional solar thermal power generation.The system coupled the solar collector to the bottom cycle of the Combined Cycle Gas and Steam system,using a trough collector to heat part of the high pressure saturated water,and using a vacuum tube collector to heat part of the low pressure saturated water.This constitutes the ISCC system we studied.The system is coupled with the gas-steam combined cycle system to solve the intermittent and unstable problems of the individual solar thermal power generation system.In the second chapter of this paper,the model of the ISCC system is proposed and established and some assumptions eire made on some parameters in the model.In the third chapter,in order to analyze the thermodynamic performance of the system,some performance parameters are proposed and the mathematical calculation model of the trough and vacuum tube heat collecting field is established and the calculation results are analyzed.Based on the time-varying characteristics of solar energy,the influence of climate and the heat flux density,which the ISCC system is unstable in different kind of solar radiation.Therefore,in the fourth chapter,the thermal performance of the system under the condition of solar energy changing conditions is studied.According to the research in Chapter four,we increase the research on solar thermal storage system,in order to make solar energy work stably,and analyze the feasibility and initial investment cost of solar thermal storage system from the perspective of energy cost,which provided the research foundation for the commercial operation of ISCC system.