山东科学2025，Vol.38Issue(5)：80-93,14.DOI:10.3976/j.issn.1002-4026.20240105
跨临界二氧化碳储能系统的热力学性质研究
Study of thermodynamic properties of transcritical carbon dioxide energy storage system
摘要
Abstract
Carbon dioxide energy storage(CCES),which has evolved from compressed air energy storage,offers advantages such as zero carbon emissions,high energy storage density,safety and reliability.To further utilize the advantages of easy liquefaction and the high energy density of carbon dioxide,a transcritical carbon dioxide energy storage system(TC-CCES)with gas-liquid two-phase changes was proposed.The low-pressure storage tank in the system contains a gas-liquid mixture that remains in transcritical state throughout the operation.Energy and exergy analyses were conducted on TC-CCES,and simulations were performed to obtain the dynamic properties of the system during its operation.In addition,the impact of the initial temperature of the high-pressure gas storage tank on the system was analyzed.The study revealed that lowering the initial temperature of the high-pressure tank enhanced the system efficiency.When the system ran in a stable state,it achieved an efficiency of 56.93％and an energy storage density is 3 510 kJ/m3.关键词
跨临界二氧化碳储能/气液两相/能量守恒/(火用)平衡/动态特性Key words
transcritical carbon dioxide energy storage/gas-liquid two-phase/energy conservation/exergic balance/dynamic properties分类
能源科技引用本文复制引用
姜佳晖,张学林,李双江,薛小代,陈伟,张斌..跨临界二氧化碳储能系统的热力学性质研究[J].山东科学,2025,38(5):80-93,14.基金项目
中国华能集团总部科技项目(HNKJ21-H33) （HNKJ21-H33）
中国电建集团科技项目(DJ-ZDXM-2022-17) （DJ-ZDXM-2022-17）
