流体机械2024，Vol.52Issue(6)：49-57,9.DOI:10.3969/j.issn.1005-0329.2024.06.007
跨临界CO2储能系统中填充床蓄冷性能的动态分析
Dynamic analysis of the performance of filled-bed cooling storage in transcritical carbon dioxide energy storage systems
摘要
Abstract
In order to further improve the performance of the carbon dioxide energy storage system,the heat transfer model of carbon dioxide and filled bed at different heat transfer stages was established,and the influence law of key design parameters such as the length of the filled bed on the cold storage unit was explored.The results show that,due to the existence of the thermocline region,a large amount of cold stored in the cold storage material in the initial cycle is not utilized,resulting in a low exergy efficiency.As the number of cycles increases,the thermocline region moves backward,and the exergy efficiency of the cold storage unit increases.After 15 cycles,the cold recovery efficiency and the exergy efficiency of the refrigeration unit are stabilized at 96.10%and 82.44%.Compared with the length of the filled bed,the diameter of the filled bed has a greater influence on its temperature distribution.This study can provide theoretical guidance for the engineering application of filled beds in transcritical CO2 energy storage systems.关键词
压缩CO2储能/填充床/㶲分析/蓄冷性能Key words
compressed carbon dioxide energy storage/packed beds/exergy analysis/cold storage performance分类
机械制造引用本文复制引用
姚小彦,陈晓文,黄勇,黄研,刘鹏虎,程祖田,王焕然..跨临界CO2储能系统中填充床蓄冷性能的动态分析[J].流体机械,2024,52(6):49-57,9.基金项目
陕西省自然科学基础研究项目(2021JQ-047) （2021JQ-047）
