| The basic situation of China's energy structure is unreasonable because the energy consumption by China as been developed rapidly.According to the data from ‘BP China Energy Statistical Yearbook',coal consumption in 2015 has minimized,covering 63.7% of primary energy consumption.Similarly,The consumption of crude oil accounts for 18.6% has also been decreased,indeed.On the other hand,it has been recored that Nuclear power,hydropower and other renewable energy consumption accounts for about 12% of primary energy consumption.It is worth noting that the consumption of natural gas in 2015 has risen to 5.9%,which has hovered around 2% before.It indicates the country's emphasis on natural gas power generation technology.However,China's energy demand is dependent on coal consumption.Some experts predicted that in the next 20 years,this dominance would exist.This problem troubles us not only from a strategic point of view,but also in the area of environment.In recent years,the shadow of haze and fog has lingered on our land,posing severe threats to the human health.In the field of power generation,electricity produced by natural gas is relatively clean and efficient.The gas turbine and its combined cycles have the characteristics of low pollution,high efficiency and wide range of load adjustment.Many countries favor advanced gas turbine technology as the first priority in the field of power technology and science with the development of economy and the demand of international competition.Advanced gas turbine technology is a symbol of a country's comprehensive economic and technological strength.Therefore,the development of gas turbine power generation technology is an important method to solve the energy problem.This research is based on a national invention patent,which is a new gas turbine reheat cycle power generation technology,using the ‘non-thermal surface' heat transfer technology of gas combustion,improving the inlet pressure of gas turbine combustor,at the same time using gas reheat and middle cooling method,using flexible shaft system arrangement.The system has the characteristics of flexible operation,fast start-stop,high efficiency etc,and 3%-5% more than the overall efficiency of current equipment.Firstly,the basic principle and application of the system are analyzed in detailed analysis of the thermodynamics.The new type of gas turbine power generation technology has been applied to gas steam combined cycle(GTCC)power generation technology,large scale capacity of compressed air energy storage(CAES)power generation system and integrated gasification combined cycle(IGCC)power generation system.And detail thermodynamic calculation of the new three systems are carried out.Then aiming at the different parameters of three new systems and the change of working conditions,optimization of the systems is carried out.The efficiency of the new systems after optimized are 3.74%,9.37% and 2.86% higher than the most widely used gas cycle power generation technology with F-class gas turbine as the main equipments,and the optimized parameters are obtained.Then high pressure combustion of the gas turbine test platform is designed and checked aimed at the high pressure combustion in the combustion chamber of the new system.The platform has characteristics of high security,high reliability and versatility.Combustion tests can be performed for different pressures,flow rates,swirlers,nozzles,and gas species.In this chapter,the combustor,gas supply system,electric control system,mechanical system and safety system are designed and calculated detailly,and the test platform is improved and optimized.And the author has participated in the whole process of the building work.Finally,the combustion research has been applied aimed at the gas turbine high pressure combustion test platform.The law of combustion and pollution emission under different pressure are studied by two methods,numerical calculation and experiment.The law of combustion and pollutant emission under high pressure gets further studied,with different power and different equivalence ratio.The influence of flue gas mixing on high pressure combustion is also studied aimed at flue gas reheat cycle.And simulation analysis of varied multicyclone ready for reconstruction in future is made,as well which laid foundation for the following experiment and research work.The main innovation of this dissertation is that a new gas turbine reheat cycle thermodynamic system is established.Detail thermodynamic calculation are carried out,aimed at the application on the gas steam combined cycle,the large capacity of compressed air energy storage power generation technology,and integrated gasification combined cycle power generation technology.The efficiency of the system After optimization has been significantly improved than the current generation cycle.And the law of combustion and pollutant emission under high pressure,and the effect of mixing reheat flue gas on combustion are studied by experiment and numerical studies. |
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