Volume 26: Closing Carbon Cycles – A Transformation Process Involving Technology, Economy, and Society: Part I

Proxy Model Development and Application for Coupled Power Plant and Geostorage Simulations of Compressed Air Energy Storage Firdovsi Gasanzade, Wolf Tilmann Pfeiffer, Sebastian Bauer

Abstract

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 – 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