山东科学 ›› 2025, Vol. 38 ›› Issue (5): 79-92.doi: 10.3976/j.issn.1002-4026.20240105

• 能源与动力 • 上一篇    下一篇

跨临界二氧化碳储能系统的热力学性质研究

姜佳晖1(), 张学林2, 李双江3, 薛小代2, 陈伟1, 张斌1,*()   

  1. 1.青岛科技大学 机电工程学院,山东 青岛 266061
    2.清华大学 电机工程与应用电子技术系,北京 100084
    3.中国电建集团河北省电力勘测设计研究院有限公司,河北 石家庄 050032
  • 收稿日期:2024-09-02 修回日期:2024-11-11 出版日期:2025-10-20 上线日期:2025-10-11
  • 通信作者: *张斌,男,教授。研究方向为燃烧诊断技术。E-mail:zb-sh@163.com
  • 作者简介:姜佳晖(1999—),男,硕士研究生,研究方向为压缩二氧化碳储能。E-mail:17854203791@163.com
  • 基金资助:
    中国华能集团总部科技项目(HNKJ21-H33);中国电建集团科技项目(DJ-ZDXM-2022-17)

Study of thermodynamic properties of transcritical carbon dioxide energy storage system

JIANG Jiahui1(), ZHANG Xuelin2, LI Shuangjiang3, XUE Xiaodai2, CHEN Wei1, ZHANG Bin1,*()   

  1. 1. College of Electromechanical Engineering,Qingdao University of Science & Technology,Qingdao 266061,China
    2. Department of Electrical Engineering and Applied Electronics,Tsinghua University,Beijing 100084,China
    3. Power China Hebei Electric Power Engineering Co.,Ltd.,Shijiazhuang 050032,China
  • Received:2024-09-02 Revised:2024-11-11 Published:2025-10-20 Online:2025-10-11

摘要:

二氧化碳储能(CCES)是在压缩空气储能(CAES)基础上发展起来的一种新型储能技术,具有零碳排放、储能密度高以及安全可靠等优势。为进一步利用CO2易液化、能量密度高的特性,提出了一种含气液两相变化的跨临界二氧化碳储能系统(TC-CCES)。该系统低压储罐内部为气液混合物,且在系统运行过程中始终保持该状态。对所提出的TC-CCES进行了能量分析和火用分析,并仿真获取了系统运行过程中的动态特性,同时着重分析了高压储气罐初始温度对系统性能的影响。研究结果表明,降低高压罐初始温度对提升系统效率有积极作用,当系统运行至稳定状态时,效率可达56.93%,储能密度为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

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.

Key words: transcritical carbon dioxide energy storage, gas-liquid two-phase, energy conservation, exergic balance, dynamic properties

中图分类号: 

  • TK02

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