Research On Underwater Compressed Air Energy Storage System By Island

Facing the situation that fossil energy is becoming more and more tense and climate warming,renewable energy attracts more and more attention.But renewable energy is accompanied by a series of energy supply imbalance,voltage fluctuations,flicker problems,affecting the grid power quality and stability,and energy storage technology can make up for these deficiencies.In the field of energy storage,Compress Air Energy Storage is characterized by its large capacity,flexible operation mode,short start-up time and low operating cost.However,the traditional compressed air energy storage system has the efficiency Lower,large carbon emissions,there is a certain need for research.First of all,the working principle of the traditional compressed air energy storage technology is analysed,and this paper puts forward a new underwater compressed air energy storage system by the improvement.In order to optimize the design of the operating sequence of the new type of underwater constant pressure air energy storage system,the mathematical model of each part of the system is established,and then the theoretical calculation of the efficiency and efficiency of the different operating series system is carried out.Based on the system cost and operational efficiency considerations,analysis and comparison results and a reasonable combination of system operating levels is found.The results show that the total output ratio is less when the total pressure ratio and the expansion pressure are constant.The higher the number of compression stages is,the more the turbine level is,the more the output power of the turbine,So the most reasonable run level of system is three,as to achieve the purpose of improving efficiency.Secondly,the Aspen Plus simulation software is used to simulate the compressor,turbine,air storage and heat storage in the new energy storage system.The effects of compression and turbine efficiency on the system efficiency,system efficiency,heat loss and heat exchanger efficiency,the relationship between the total pressure ratio,and the volume of air storage bag,energy density and pressure,the relationship between the initial temperature of the turbine.The simulation results show that the underwater constant compressed air energy storage system can not only improve the efficiency of the system,but also have the advantages of reducing environmental pollution and storing excess wind energy at sea.Finally,the efficiency of the system is verified by the compressed air energy storage test platform of Jiamusi Tian Mi'ao New Energy Technology Company in Heilongjiang Province.