The concept of small- or medium-scale CAES using salt domes at a depth shallower than 500 m and in the capacity of 10–100 MW was recently suggested to address a burden associated with geologic exploration and high investment cost. In this study, we employed an analytical approach to calculate the hoop and radial stresses at the crown and sidewall of the storage cavity under the given cavity depth ($h$), the dimension of the cavity ($W/H$), the ratio of horizontal-to-vertical geologic stresses ($K$), and the internal air pressure ($P_{\text{in}}$). A good match of the hoop and radial stresses were observed for all tested parameters. The analysis of stress paths implies that the mechanical stability at the crown of the storage cavity could be a decisive factor for allowable storage pressure ranges. The allowable maximum storage pressure ($P_{\text{max}}^{\text{allow}}$) can be determined at the moment when the stress path touches the tensile failure criterion, while the allowable minimum storage pressure ($P_{\text{min}}^{\text{allow}}$) needs to be set to maintain stress paths below the shear failure envelope. A higher $K$ and $W/H$ values are advantageous for securing higher storage pressure, and the energy storage capacities are estimated between 1 and 10 MJ/m³ from this study.

最近提出了使用盐穹顶的中小型CAES概念，其深度小于500 m，容量为10–100 MW，以解决与地质勘探和高投资成本相关的负担。在这项研究中，我们采用一种分析方法来计算在给定腔深度下存储腔冠和侧壁的环向应力和径向应力（$H$），腔的尺寸（$\mathrm{w\; ^}/H$），水平与垂直地质应力之比（$ķ$），以及内部气压（$P_{\text{在}}$）。对于所有测试参数，观察到环向和径向应力的良好匹配。应力路径的分析表明，存储腔顶部的机械稳定性可能是允许的存储压力范围的决定性因素。允许的最大储存压力（$P_{\text{最高}}^{\text{允许}}$）可以在应力路径达到拉伸破坏准则时确定，而允许的最小存储压力（$P_{\text{分}}^{\text{允许}}$需要设定）以将应力路径维持在剪切破坏范围以下。更高的$ķ$ 和 $\mathrm{w\; ^}/H$该值有利于确保更高的存储压力，并且根据这项研究，储能容量估计在1到10 MJ / m ³之间。