Sammendrag
The goal of energy independence requires a re-evaluation of conventional sources of energy and energy storages. Compressed air energy storages (CAES) are a favorable and low-cost option for balancing off-peak electricity demands. Here, a large volume of air is compressed and stored in the ground during low-demand electricity periods. This pressurized air can then be released to generate electricity during high-demand times. This publication presents the analysis of a CAES project in an aquifer, in Iowa, U.S. using a coupled hydro-mechanical framework able to consider the main physical phenomena that control the behavior of this kind of system. Numerical simulations of the behavior of the host rock were performed during both the initialization phase as well as the operational phase. The impact of porosity heterogeneities on system performance was also examined.
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