The Performance Evaluation And Thermal Characteristics Of Thermal-Nuclear Combined Power System Based On Exergy Analysis

With the rapid development of China's economy,the demand for energy and the utilization amount of energy are increasing.China is a country mainly based on coal-fired power,while the burning of coal will produce a large number of gas pollutants such as SOx?NOx and CO2,which makes the environmental problems become more and more prominent.At the same time,as the world's largest carbon emission country,China has to face the pressure of international emission reduction.Therefore,China encourages the development of clean energy in recent years by investing lots of manpower and material resources especially in the development and research of nuclear power plant,and conducting a large number of studies on the complementary co-generation system.At first,this Paper uses the Ebsilon software to build thermal power unit and AP1000 unit thermodynamic model respectively,and analyses the thermal characteristics of each system and equipment.Based on the second law of thermodynamics exergy analysis methods,this Paper analyzes the exergy efficiency,exergy losses,exergy loss rate and the exergy loss coefficient of each equipment,which laid the foundation of study on thermal characteristics of thermal power units and nuclear power units under different integration schemes.On the basis of research methods of the coal-fired generating units and the multi-energy complementary power generation systems,this Paper refers to the characteristics of thermal power units and the nuclear power unit,determines the amount of nuclear energy input and the coupling way to integrate the generation of lateral side of nuclear power and thermal power,and puts forward three kinds of combined power generation systems:Parallel power generation system,serial power generation system and direct heating power generation system.This Paper uses the Ebsilon software to build the simulation model,analyses the thermal characteristics of each system and equipment,comPares with the original conventional power stations,and further verifies the feasibility and superiority of the combined generation of thermal power and nuclear power units.In the end,to study the contributions of a certain kind of energy within the whole multi-energy complementary power generation system to the entirety,this Paper conducts a contribution research on the above three kinds of combined power generation system.Based on the exergy analysis methods of the second law of thermodynamics,this Paper studies the proportion of nuclear energy in each energy stream,and comPared the calculation results with the original direct heat input method,and the direct exergy input method.The Slight difference more scientifically evaluates the nuclear energy share.