摘要
等温压缩空气储能技术不需要对热量进行存储,系统结构简单、理论效率高,但是要实现等温压缩和膨胀是非常困难的。通过液体喷雾技术可以有效降低空气温度的变化量,使压缩和膨胀过程更加接近等温过程。为此建立了基于液体喷雾的等温压缩空气储能系统的热力学模型,计算并分析了液体喷雾参数对系统热力学性能的影响规律。结果表明:通过液体喷雾技术可以显著地减小空气温度的变化量,压缩过程的温度变化量由49.58 K降低到9.85 K,膨胀过程的温度变化量由37 K降低到12.03 K;液体活塞内的能量损失由14.32%降低到4.43%;系统的循环效率由62.11%提高到76.60%,储能密度由1.857 MJ/m^(3)提高到3.473 MJ/m^(3)。本文的研究结果为等温压缩空气储能系统的结构和参数优化提供了参考。
Isothermal compressed air energy storage(ICAES)technology does not require heat storage,and the system structure is simple and theoretically efficient,but it is very difficult to realize isothermal compression and expansion.The variation of air temperature can be effectively reduced by liquid spray technology,which makes the compression and expansion process closer to the isothermal process.Therefore,the thermodynamic model of an ICAES system based on liquid spray was developed,and the effect of liquid spray parameters on the thermodynamic properties of the system was calculated and analyzed.The results show that the variation of air temperature can be significantly reduced by the liquid spray technology,with the temperature variation during compression reduced from 49.58 K to 9.85 K,and the temperature variation during expansion reduced from^(3)7 K to 12.03 K.The energy loss in the liquid piston is reduced from 14.32%to 4.43%,the cycle efficiency of the system is increased from 62.11%to 76.60%,and the energy storage density is increased from 1.857 MJ/m^(3) to 3.473 MJ/m^(3).The results of this paper can provide a reference for the optimization of the structure and parameters of the ICAES system.
作者
王珂
崔倩
何青
WANG Ke;CUI Qian;HE Qing(School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)
出处
《动力工程学报》
北大核心
2025年第6期858-866,共9页
Journal of Chinese Society of Power Engineering
基金
国家重点研发计划资助项目(2020YFB0905900)。
关键词
压缩空气储能
等温压缩
液体活塞
液体喷雾
热力学特性
循环效率
compressed air energy storage
isothermal compress
liquid piston
liquid spray
thermodynamic property
cycle efficiency
作者简介
王珂(1998-),男,山西朔州人,博士研究生,研究方向为先进储能技术;通信作者:何青,男,教授,博士,E-mail:heq@ncepu.edu.cn。
