摘要
风能和太阳能等可再生能源具有间歇性和不稳定性的特点,不能大规模接入电网。压缩空气储能作为大规模储能技术可以调节电网负荷,削峰填谷,解决上述问题。目前压缩空气储能系统的压缩空气都是在体积恒定的容器中储存,压缩空气在释放时经过减压阀节流减压至预定的较低压力,浪费了大量的有用能,导致系统效率低,压缩空气利用率低。等压压缩空气储能通过保持压缩空气在储存和释放时压力的恒定,解决系统效率低的问题。基于质量守恒和能量守恒定律,建立压缩空气的热力学模型,采用基于气-液相变的等压方法,系统效率提高了12.18%。
The renewable energy sources such as wind and solar energy are intermittent and unstable,and cannot be connected to the grid on a large scale.As a large scale energy storage technology,compressed air energy storage can solve the above problems,adjust the load of the power grid,and cut peaks and fill valleys.However,the compressed air of the commercialized compressed air energy storage system is stored in a constant volume container.When the compressed air is released,it is reduced to a predetermined low pressure through the pressure reducing valve,which wastes a lot of useful energy,resulting in low system efficiency and low compressed air utilization rate.The isobaric compressed air energy storage system solves the problem of low system efficiency by keeping the pressure of the compressed gas constant during storage and release.Based on the law of conservation of mass and the law of conservation of energy,the thermodynamic model of compressed air is established.The efficiency of the system was improved by 12.18%by using the isobaric method based on gas-liquid phase transition.
作者
张鹏举
李子瑞
许未晴
李光耀
蔡茂林
石岩
ZHANG Peng-ju;LI Zi-rui;XU Wei-qing;LI Guang-yao;CAI Mao-lin;SHI Yan(School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191;Pneumatic and Thermodynamic Energy Storage and Supply Beijing Key Laboratory, Beijing 100191)
出处
《液压与气动》
北大核心
2021年第7期43-48,共6页
Chinese Hydraulics & Pneumatics
基金
国家自然科学基金(51875012,51605013)
北京市卓越青年科学家项目(BJJWZYJH01201910006021)
中央高校基本科研业务费专项资金(YWF-20-BJ-J-613)。
关键词
压缩空气储能
等压容器
气-液相变
储能效率
compressed air energy storage
isobaric container
gas-liquid phase transition
energy storage efficiency
