山东科学2024，Vol.37Issue(4)：93-104,12.DOI:10.3976/j.issn.1002-4026.20230127
压缩sCO2储能系统动态特性仿真
Study on supercritical carbon dioxide energy storage system and its operating characteristics
摘要
Abstract
As a novel energy storage method,compressed supercritical carbon dioxide(sCO2)energy storage offers several advantages,such as high energy storage density,compact structure,long service life,and negative carbon emissions.Therefore,it has a broad application prospect in the energy storage and conversion.In this study,a dynamic mathematical model for the compressed sCO2 energy storage system(SC-CCES)was established based on the mass conservation and energy conservation laws and the reliability of the model was verified.Additionally,dynamic simulations of the SC-CCES system with single-stage compression and single-stage expansion were performed using Matlab/Simulink.Under the designed operating conditions,the energy storage efficiency of the SC-CCES system was found to be 51.98%,with an energy storage density of 447.8 kWh/m3.The energy storage density of the SC-CCES system was more than 20 times higher than that of a traditional compressed air energy storage system.Furthermore,the impact of different high-pressure tank inlet pressures on system performance was analyzed.The results showed that the energy storage efficiency increases with the increase of the inlet pressure of the high-pressure storage tank,while the energy storage density is exactly the opposite.This study provides a basis for the development of compressed carbon dioxide energy storage.关键词
压缩超临界二氧化碳储能/动态仿真/能量守恒/储能密度Key words
compressed supercritical carbon dioxide energy storage/dynamic simulation/energy conservation/energy density分类
能源科技引用本文复制引用
姜佳晖,王子杰,池冉,陈伟,薛小代,张通,张学林,张斌..压缩sCO2储能系统动态特性仿真[J].山东科学,2024,37(4):93-104,12.基金项目
中国电建集团河北省电力勘测设计研究院有限公司科技计划项目(DJ-ZDXM-2022-17) （DJ-ZDXM-2022-17）
