Integrating energy storage technology with renewable energy can improve largely the penetration of renewable energy. A novel energy storage system based on compressed air energy storage, electrical heater and Kalina cycle is thus proposed. This work focuses on demonstrating the feasiblity and effectiveness of the hybrid system for achieving the energy cascade utilization through parametric analysis. Results show that within certain ranges, higher discharging pressure and lower electrical heating temperature are beneficial for increasing round trip efficiency of the hybrid system. Decreasing discharging pressure and increasing separator pressure would reach higher power production of the Kalina cycle turbine.
Keywords compressed air energy storage; Kalina cycle; electrical heater; thermodynamic study