Study On The Influencing Factors Of Convergence Behavior Of Drop-shaped Salt Cave Gas Storage

In order to meet the national energy security needs,the development of energy storage technology is essential for solving the uncontrollable problems of new energy.The use of salt cavities for compressed air energy storage can not only take advantage of the good engineering properties of salt rocks,but also fill the industrial vacuum left in some areas after the end of salt mining.During long-term operations,water-drop-shaped salt cavity gas storage facilities will experience continuous volume shrinkage.Excessive volume shrinkage can affect safety and greatly reduce engineering profitability.Therefore,accurate prediction of the shrinkage characteristics of the water-drop-shaped salt cavity gas storage facility has become a key issue.This study is divided into three stages.In the first stage,finite element experiments were2and the influence of various basic parameters was analyzed based on this data.In the second stage,SPSS data analysis software was used to analyze the data obtained in the first stage to quantitatively determine the key parameters.In the third stage,the BP neural network algorithm based on the neural network algorithm was used to combine the key parameters obtained in the second stage with the experimental data obtained in the first stage to obtain the predicted platform for the shrinkage behavior of the water-drop-shaped salt cavity gas storage facility.The following conclusions were drawn in this study:1.The main factors affecting the stability of the water-drop-shaped salt cavity gas storage facility are:operating internal pressure parameters are the most sensitive,followed by geometric size parameters,and joint parameters are the weakest.The minimum internal pressure parameter holds a dominant position.2.Factors affecting the shrinkage behavior of the water-drop-shaped salt cavity gas storage facility:Properly increasing the minimum,average,and maximum operating internal pressure in the range of 30%to 80%of the overlying load can have a certain inhibitory effect on the shrinkage behavior of the salt cavity,and this effect will increase with time.At the same time,the maximum operating internal pressure difference is approximately 50%of the overlying load.3.The effects of geometric size changes and poor interlayer conditions on the shrinkage characteristics of the water-drop-shaped salt cavity gas storage facility:The shrinkage behavior of circular gas storage facilities is relatively inconspicuous.The elastic modulus of the interlayer should be slightly higher than that of the salt rock.In situations where the interlayer strength is too high or the geometric shape is too slender,some locations may experience large displacements.4.The iMPact of multi-cavity structures on the water-drop-shaped salt cavity gas storage facility:The difference in internal pressure between adjacent cavities in a double-cavity structure will produce adverse results.A cavity spacing at about 2 times the bore diameter will achieve good results.In a multi-cavity structure,a diamond layout is better than a square layout.5.Artificial intelligence prediction platform:Based on the numerical results obtained from the analysis,an artificial intelligence model was trained and its effectiveness was confirmed through calculations,and a graphical interface was developed to meet the needs of simplified analysis.