| In recent years,with the increasing shortage of traditional fossil energy,more and more attention has been paid to the technology of renewable energy utilization worldwide.Due to the impact of natural reality,renewable energy sources such as wind and solar energy have the disadvantages of volatility and intermittence.These shortcomings lead to the adverse impact of large-scale grid connected new energy on the safe operation of the power grid.It is urgent to develop power storage technology with large capacity,high efficiency and high reliability to solve the intermittent and unstable problems of renewable energy generation.The power storage technology needs to solve DSM issues and improve the absorptive capacity of renewable energy power.Also the occurrence of "abandoned wind and solar energy" must be reduced or avoided by this power storage technology.Compressed air energy storage system is a feasible and promising technology for large-scale electric energy storage in China.With the development of technology,some scholars put forward a new compressed air energy storage system,called advanced adiabatic compressed air energy storage system(AA-CAES).Instead of using fossil energy,the system reheats the air in the process of energy release by storing compressed heat released by compressed air during storage.At present,the research on AA-CAES system at home and abroad mainly focuses on system theory design,component performance analysis of overall performance,new type of storage chamber thermodynamic model,and the influence of the thermodynamic characteristics of the storage chamber on the overall performance of the system.Some key scientific and technical problems in the study of compressed air energy storage technology are proposed in this paper.There is little or no research in these areas.In this paper,the concept of advanced adiabatic compressed air energy storage system based on solar assisted heating is put forward.The thermal performance of the main equipments of the system is analyzed.Then the thermodynamic modeling of each device is carried out and programmed by MATLAB software.The advantages and disadvantages of the coupled system and the traditional AA-CAES system are compared and analyzed.The parameter matching problem of the coupling system is studied in detail.The influence of different energy storage and energy release models on the operation performance of the system is studied,and the optimal operation strategy of different energy storage and energy release models is determined.The effect of different compressors and expander stages on the total system performance has been studied.The influence of heat exchanger on the performance of the system has been analyzed,and then the optimum heat exchanger efficiency is determined.The effect of energy storage and release powers on system's performance is also analyzed.The results of this paper have reference significance for promoting China's compressed air energy storage technology and industrial development,and the technical achievements have a certain application prospect. |
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