Porous media compressed air energy storage (PM-CAES) is a viable option to compensate expected fluctuations in energy supply in future energy systems with a 100% share of renewables. However, the design and evaluation of operational conditions for a PM-CAES require an efficient coupled power plant â€“ geostorage model. In this study, therefore, a proxy model for the geostorage is developed and evaluated with respect to two scenarios representing realistic energy system load profiles. Results show, that the proxy model represents a consistent approximation, yielding storage pressure, rates and capacity within 98% of the full-scale reservoir model, while reducing runtimes to about 6%.
Keywords Compressed air energy storage, proxy model, model coupling, renewable energy systems