Thermodynamic Analysis of Compressed Air Energy Storage Based on Abandoned Oil and Gas Wells

In order to recycle the abandoned oil and gas wells, a new compressed air energy storage system based on abandoned oil and gas wells is proposed in this paper. The system uses oil and gas wells as air storage chambers and uses both compression heat and fuel to heat compressed air. In addition, the system can avoid the environmental pollution caused by associated gas emission. The performance of the proposed system is investigated and results shows that under the condition of output power is 10 MW, the system efficiency of the proposed system is 52.6%, which is 10.6% higher than that of the Huntorf plant. Additionally, parameter analysis is also conducted to explore the influence of the ambient temperature, maximum pressure of air storage chamber, isentropic efficiency of compressor and turbine and pressure of air at the entrance of combustor. Among them, the increase of isentropic efficiency of compressor and turbine and pressure of air at the entrance of combustor have the positive effect on system efficiency, while the ambient temperature and the maximum pressure of air storage chamber have the negative effect on system efficiency.