可灵活调节的压缩二氧化碳储能热电联供系统及其热力学分析

许文盼; 赵攀; 马宁; 周哲浩; 刘艾杰

doi:10.7652/xjtuxb202508008

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可灵活调节的压缩二氧化碳储能热电联供系统及其热力学分析

—————————————————————— | 更新时间：2025-07-30

- 可灵活调节的压缩二氧化碳储能热电联供系统及其热力学分析
- Flexible Compressed CO₂ Energy Storage Combined Heat and Power System and Thermodynamic Analysis
- 西安交通大学学报 2025年59卷第8期页码：75-87
- 作者机构：
  
  西安交通大学能源与动力工程学院， 710049，西安
- 作者简介：
  
  许文盼（1995—），男，博士生
  赵攀，男，教授，博士生导师。
- 基金信息：
  
  智能电网国家科技重大专项资助项目(2024ZD0800502)
- DOI：10.7652/xjtuxb202508008
  中图分类号： TK02
- 收稿：2025-02-14，
  
  网络首发：2025-05-08，
  
  纸质出版：2025-08-10
- 稿件说明：
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许文盼, 赵攀, 马宁, 等. 可灵活调节的压缩二氧化碳储能热电联供系统及其热力学分析[J]. 西安交通大学学报, 2025,59(8):75-87.

XU Wenpan, ZHAO Pan, MA Ning, et al. Flexible Compressed CO₂ Energy Storage Combined Heat and Power System and Thermodynamic Analysis[J]. Journal of Xi’an Jiaotong University, 2025, 59(8): 75-87. DOI: 10.7652/xjtuxb202508008.
许文盼, 赵攀, 马宁, 等. 可灵活调节的压缩二氧化碳储能热电联供系统及其热力学分析[J]. 西安交通大学学报, 2025,59(8):75-87. DOI： 10.7652/xjtuxb202508008.

XU Wenpan, ZHAO Pan, MA Ning, et al. Flexible Compressed CO₂ Energy Storage Combined Heat and Power System and Thermodynamic Analysis[J]. Journal of Xi’an Jiaotong University, 2025, 59(8): 75-87. DOI: 10.7652/xjtuxb202508008. DOI：

摘要

为解决现有压缩CO

储能系统热电联供灵活性差和储气装置节流损失大的问题，基于液压原理，提出了一种地面存储的恒压CO

储气装置，采用CO

热泵与压缩CO

储能系统相耦合的方式，构建了可灵活调节的压缩CO

储能热电联供系统。通过关键部件热力学模型和系统性能评价指标的建立，探究了不同运行模式下关键参数变化对系统热力学性能的影响。结果表明：独立运行模式下，热泵子系统性能系数随环境温度的升高呈现出先上升后下降的趋势，储能子系统透平最佳进口温度随着压缩机进口温度的升高逐渐增大，在CO

拟临界区增速较快，储能子系统充放电效率则呈现出先下降后上升的趋势，效率最低值在拟临界区起点附近；与现有压缩气体储能热电联供系统相比，所提系统最佳充放电效率提高9.35%，性能系数范围由0.79～1.58改善至0.99～2.01。研究结果证明了所提出的压缩CO

储能热电联供系统具有高效和灵活供能的特点，为实现可再生能源高效利用和推动乡村低碳转型提供了理论依据。

Abstract

To address the issues of low flexibility in existing compressed CO

energy storage systems and significant throttling losses in gas storage devices

a ground-based constant-pressure CO

storage device is proposed based on hydraulic principles. This device is coupled with a heat pump to construct a flexible compressed CO

energy storage combined heat and power (CHP) system. By establishing thermodynamic models for key components and performance evaluation metrics for the system

the study investigates the impact of variations in key parameters under different operating modes on system performance. The results indicate that in the independent operating mode

the coefficient of performance of the heat pump subsystem initially increases and then decreases with rising ambient temperatures. The optimal inlet temperature for the turbine of the energy

storage subsystem gradually increases with the compressor’s inlet temperature

especially accelerating in the near-critical region of CO

. The charging and discharging efficiency of the energy storage subsystem shows a trend of first decreasing and then increasing

with the minimum efficiency occurring near the starting point of the near-critical region. Compared to existing compressed gas energy storage CHP systems

the proposed system improves the optimal charging and discharging efficiency by 9.35%

and the coefficient of performance range is enhanced from 0.79－1.58 to 0.99－2.01. This study demonstrates that the proposed compressed CO

energy storage CHP system is characterized by efficient and flexible energy supply

providing a theoretical basis for the efficient utilization of renewable energy and promoting low-carbon transitions in rural areas.

关键词

Keywords

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