热泵储电中双级压缩与梯度储热协同作用的分析

石宏岩; 刘一佳

doi:10.19799/j.cnki.2095-4239.2026.0360

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热泵储电中双级压缩与梯度储热协同作用的分析

储能系统与工程 | 更新时间：2026-09-18

- 热泵储电中双级压缩与梯度储热协同作用的分析
- Analysis of synergistic effect of dual-stage compression and gradient heat storage in pumped thermal electricity storage
- 储能科学与技术 2026年15卷第9期页码：3668-3678
- 作者机构：
  
  赤峰大学资源环境与建筑工程学院，内蒙古赤峰 024000
- 作者简介：
  
  石宏岩（1990—），男，讲师，研究方向为热泵储能技术，E-mail：shihongyan@cfxy.edu.cn。
- 基金信息：
  
  赤峰大学2026年教育教学研究项目(JYJXY202648);赤峰大学2026年度大学生创新创业训练计划项目(S202610138018)
- DOI：10.19799/j.cnki.2095-4239.2026.0360
  中图分类号： TK 02;TK 124
- 收稿：2026-04-29，
  
  修回：2026-05-19，
  
  纸质出版：2026-09-28
- 稿件说明：
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石宏岩, 刘一佳. 热泵储电中双级压缩与梯度储热协同作用的分析[J]. 储能科学与技术, 2026, 15(9): 3668-3678.

SHI Hongyan, LIU Yijia. Analysis of synergistic effect of dual-stage compression and gradient heat storage in pumped thermal electricity storage[J]. Energy Storage Science and Technology, 2026, 15(9): 3668-3678.
石宏岩, 刘一佳. 热泵储电中双级压缩与梯度储热协同作用的分析[J]. 储能科学与技术, 2026, 15(9): 3668-3678. DOI： 10.19799/j.cnki.2095-4239.2026.0360.

SHI Hongyan, LIU Yijia. Analysis of synergistic effect of dual-stage compression and gradient heat storage in pumped thermal electricity storage[J]. Energy Storage Science and Technology, 2026, 15(9): 3668-3678. DOI： 10.19799/j.cnki.2095-4239.2026.0360.

摘要

热泵储电系统作为一种大规模长期储能技术，凭借其高效灵活、环境友好、循环寿命长等优势，成为构建新型电力系统的关键技术。基于闭式布雷顿循环原理，以热泵储能系统中的双级压缩和梯度储热两个阶段的协同效应为目标，构建了单级和双级压缩热泵储电系统的热力学模型，对比分析其㶲效率、往返效率及火积耗散。结果表明，双级压缩+双级膨胀协同运行的模式（模式四）下效率最高，其㶲效率和往返效率分别达到83.86%和75.69%；通过在双级压缩中间设置电加热器进一步优化梯度储热，使一二级储热温差增大至57.14 K时，㶲效率下降26.34%，往返效率增加3.15%，系统效率进一步提升。火积耗散分析表明释能回热器为主要耗散单元，优化后可显著降低不可逆损失，换热端差、压力损失等参数与系统㶲效率、往返效率呈现负相关性，验证了双级压缩与梯度储热协同提高系统性能的可行性，为热泵储电系统的设计提供了理论依据。

Abstract

As an efficient

environmentally friendly

and long-life large-scale long-duration energy storage technology

pumped thermal electricity storage (PTES) is a key technical approach for constructing new-type power systems. Based on the closed Brayton cycle principle

this study establishes thermodynamic models for single- and two-stage compression PTES systems

focusing on the synergistic effect of two-stage compression and graded heat storage. Furthermore

comparative analysis is performed to analyze the exergy efficiency

round-trip efficiency

and entransy dissipation characteristics of the systems. The results demonstrate that the collaborative operation mode combining two-stage compression and two-stage expansion (Mode IV) exhibits the optimal performance. Under this mode

the system achieves 83.86% exergy efficiency and 75.69% round-trip efficiency

which represent increases of -12.19% and 10.32%

respectively

over the single-stage system. After installing an electric heater between the two compression stages to optimize graded heat storage

the temperature difference between primary and secondary heat storage increases to 57.14 K. Although this improvement decreases exergy efficiency by 26.34%

it increases round-trip efficiency by 3.15%. Entransy dissipation analysis indicates that the energy-releasing regenerator is the primary component causing irreversible losses. These losses can be effectively reduced via targeted optimization. Key parameters such as heat transfer terminal temperature difference and pressure loss are negatively correlated with the exergy and round-trip efficiencies of the system. This study verifies the feasibility of synergistic optimization of two-stage compression and graded heat storage

providing a solid theoretical basis for the design and engineering application of high-performance PTES systems.

关键词

Keywords

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