新型变压比先进绝热压缩空气储能系统及其热力学分析  

Thermodynamic analysis of novel advanced adiabatic compressed air energy storage system with variable pressure ratio

作　　者：何青[1] 付海伦 康浩强 HE Qing;FU Hailun;KANG Haoqiang(School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《热力发电》2020年第8期36-42,共7页Thermal Power Generation

基　　金：国家重点研发计划项目(2017YFB0903601)。

摘　　要：为了提高先进绝热压缩空气储能(AA-CAES)系统的充放电效率,提出了新型变压比AA-CAES系统,建立了系统的热力学模型,计算了不同膨胀机组级数和不同变膨胀比运行方式下系统的热力学特性,得到了各种配置和运行方式下膨胀机组的释能时间和总输出功,以及整个系统的充放电效率等参数。结果表明,对具有4级膨胀的AA-CAES系统,变膨胀比使得膨胀机组的释能时间从3095 s增加到5014 s,总输出功从1.953 GJ增加到2.728 GJ,整个系统的充放电效率从45.11%提高到63.00%,变压比AA-CAES显著提高了AA-CAES系统的热力学性能。In order to improve the charge and discharge efficiency of advanced adiabatic compressed air energy storage(AA-CAES)system,a novel AA-CAES system with variable pressure ratio is proposed.The time for energy release,the total output work of expansion unit stages,and the charge and discharge efficiency of the whole system under various configurations and operation modes are obtained by establishing the thermodynamic model of the system and calculating the thermodynamic characteristics of the system under different expansion unit stages and different variable expansion ratio operation modes.The results show that,for the AA-CAES system with 4-level expansion,the variable expansion ratio make the time for energy release of the expansion unit stages increase from 3095 s to 5014 s,the total output work increase from 1.953 GJ to 2.728 GJ,the charge and discharge efficiency of the whole system increase from 45.11%to 63.00%.It can be seen that the AA-CAES with variable pressure ratio can significantly improve the thermodynamic performance of the AA-CAES system.

关 键 词：压缩空气储能 变压比 膨胀过程 热力学模型 释能时间 总输出功 充放电效率 

分 类 号：TK02[动力工程及工程热物理]