Design and flow Simulation of compressed Air Energy Storage system in Aquifer

Compressed air energy storage is the most promising energy storage technology at present, and aquifer compressed air energy storage can achieve large-scale storage of compressed air by breaking the dependence of traditional compressed air energy storage on geological conditions such as large rock caves. Based on Kushnir's study and some hypotheses, the mathematical model of compressed air energy storage in aquifer is established in this paper. Then, taking 3 MW energy storage scale as an example, the energy storage model of underground aquifer with buried depth of 800m in horizontal stratum is established by using numerical simulation method. The initial gas bag formation after gas injection and the parameters of pressure and gas saturation during the system cycle were analyzed. Experimental results show that the pressure and gas saturation change little after a complete cycle, and the effective gas phase volume of the available energy storage and energy release cycle decreases slowly with the cycle going on. The aquifer is widely distributed and well sealed, so it is feasible to store compressed air energy as a gas storage bank.