Research On Operation Optimization Of CCHP System With Carbon Dioxide Storage Energy

When renewable energy is connected to the combined cooling,heating,and power(CCHP)systems,how to solve the problem caused by the volatility of renewable energy is the key to the optimization of the combined cooling,heating,and power(CCHP)systems.Reasonable regulation of the output of the energy storage part can improve the operational stability and economy of the system.How to choose a suitable energy storage method is a hot spot in the research field of the combined cooling,heating,and power(CCHP)systems with energy storage.In the choice of energy storage methods,compressed air energy storage is widely used in cogeneration systems because of its safety,high efficiency,clean and environmentally friendly,long life and low cost,but with capacity Increasingly,the requirements for the gas storage chamber are constantly increasing.In order to solve this problem,the compressed medium is changed into carbon dioxide to facilitate energy storage.Therefore,this thesis deeply studies the thermodynamic performance of carbon dioxide energy storage system,proposes a combined cooling,heating,and power system containing carbon dioxide energy storage,constructs an objective function containing energy,economy and environment,and run the particle swarm algorithm to optimize the output of the main energy supply equipment.Firstly,this thesis analyzes the development status of the combined cooling,heating,and power system,and describes the current research status of the key technologies of the combined cooling,heating,and power system and the system that integrates renewable energy and energy storage.Secondly,it analyzes different structure and principle of the combined cooling,heating,and power system,the application of compressed air energy storage in the CCHP system is elaborated in detail,and the mathematical model of the commonly used energy supply equipment in the cogeneration system is given.Then,the cogeneration system with carbon dioxide storage energy is proposed,the working principle of the carbon dioxide energy storage subsystem is described,and the key parameters are simulated and analyzed.The application is given in the cogeneration system.The best parameters for the carbon dioxide energy storage subsystem.Finally,the objective function of three evaluation indicators including primary energy consumption,operating cost and carbon dioxide emission is constructed,and the method and flow chart of the system to select the main energy supply equipment are given.Through the simulation results,the output of the equipment in the typical daytime in winter and summer and the energy state of the carbon dioxide energy storage system during operation are analyzed,and the cogeneration system without storage and the heat and cold of the battery are included.The comparative analysis of the cogeneration system and the cogeneration system with compressed air energy storage shows the feasibility and economy of carbon dioxide storage energy in the application of CCHP.In this thesis,through the research on the CCHP system with carbon dioxide storage energy,the relationship between the CCHP system and the carbon dioxide energy storage is analyzed,and the system design for the carbon dioxide energy storage into the CCHP system is analyzed.The operation provides a reference and looks forward to the future development trend of the the combined cooling,heating,and power system with energy storage.