压缩空气储能技术研究进展

 压缩空气储能是目前大规模电力储能技术研发的热点，是支撑可再生能源发展的关键技术之一，在新能源并网发电、电网调峰等领域有广泛的应用空间。介绍了空气压缩设备的发展状况，总结了绝热压缩设备效率的不足，分析了螺杆式空压机提升能效的关键因素。比较了压缩空气储能所经历的传统燃气补热压缩、非燃气补热的绝热压缩、等温压缩等阶段不同类型的储能原理和效率，介绍了等温压缩空气储能的实现方法和进展，并结合当前专利情况展望了未来压缩空气储能的技术发展方向。

Research progress of compressed air energy storage systems

Currently, compressed air energy storage (CAES) is a topic of general interest in the field of large-scale power storage technology research and development, because it has a broad application prospect in both grid-connection of new energy power generation and peak-load regulation of power grid. The research and development of air compressor is reviewed in this paper. Due to the fact that it is difficult for adiabatic process based equipment to improve working efficiency, screw air compressor has been proposed to reduce gas temperature by compression of mixed oil and gas, further lowering down the energy consumption. For the different evolution periods of CAES, including traditional gas-heating compression, non-gas-heating adiabatic compression and isothermal compression, different principles and variable efficiency are analyzed and compared. Realization methods and the latest development of isothermal CAES are introduced in detail. Finally, combined with the current situation, the future development direction of CAES technology is prospected.