Study on the effect of spray flow rate on pumped compressed air energy storage system

Abstract Pumped compressed air energy storage technology can effectively promote the green transformation of energy structure. In this study, the effects of different spray flow rates on operational, energy, and exergy performance were analyzed and compared. It was found that as the spray flow rate increased, the variation of air temperature decreased significantly and the variation of water temperature increased slightly. The larger the spray flow rate is, the stronger the air-water heat transfer performance in the tank will be, and the higher the work consumption of the spraying device will be. When the spray flow rate increases, the air-water heat transfer performance is enhanced, and the power consumption of the spray device is higher. Therefore, when the spray flow rate increases, η E first increases and then decreases, and η x and ESD continuously increase.