Carbon Dioxide Capture from Compressed Air Energy Storage System

Research projects on new energy storage technologies are underway due to their prominent role in the mitigation of renewable energy fluctuation and grid stability. Compressed air energy storage, as a grid-scale energy storage technology, has attracted attention in recent years with prompt deployment of renewable energies and for peak-shaving applications. Nevertheless, greenhouse gas emission is its main drawback and the lacking point of this technology in the literature. In this regard, an innovative cogeneration concept based on compressed air energy storage with post-combusting carbon dioxide capture is proposed in the present article to reduce greenhouse gas emissions. Moreover, an organic Rankine cycle has been employed to provide further power through waste heat recovery. The reference system is simulated by ASPEN Plus from the perspective of thermodynamics. In addition, a parametric analysis has been considered to address the impact of the critical parameters on system performance. The results indicate that 108 MW power with a round trip efficiency of 44% is generated during the peak demand periods. Also, 10.24 kg/s carbon dioxide with an efficiency of 87.6% is captured by the CO2 capture unit.