A Comparative Study of the Thermodynamic Performance of Carbon Dioxide Pumped Thermal Energy Storage Systems

WANG Ke; HE Qing

doi:10.19805/j.cnki.jcspe.2026.250020

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A Comparative Study of the Thermodynamic Performance of Carbon Dioxide Pumped Thermal Energy Storage Systems

更新时间：2026-10-10

- A Comparative Study of the Thermodynamic Performance of Carbon Dioxide Pumped Thermal Energy Storage Systems
- Chinese Journal of Power Engineering Vol. 46, Issue 5, Pages: 40-49(2026)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.250020
  CLC： TK02
- Published：2026
- 稿件说明：
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王珂, 何青. 二氧化碳热泵储能系统的热力学性能对比研究[J]. 动力工程学报, 2026, 46(5): 40-49.
王珂, 何青. 二氧化碳热泵储能系统的热力学性能对比研究[J]. 动力工程学报, 2026, 46(5): 40-49. DOI： 10.19805/j.cnki.jcspe.2026.250020.

DOI： 10.19805/j.cnki.jcspe.2026.250020

摘要

二氧化碳热泵储能系统不需要储气库存储二氧化碳

可以消除对大型储气库的依赖

而不同类型的二氧化碳热泵储能系统具有不同的性能表现

基于此

对基于布雷顿循环和朗肯循环的二氧化碳热泵储能系统进行了热力学性能对比研究

根据敏感性分析结果对两个系统的参数分别进行了优化。结果表明:在基本工况下

基于朗肯循环的二氧化碳热泵储能系统的循环效率较高

为51.86%;降低高温压缩机的入口压力及压比可以提高其循环效率。基于布雷顿循环的二氧化碳热泵储能系统的储能密度较高

为7.05 kW·h/m3;增大高温压缩机的入口温度可以使其循环效率提高。参数优化后

基于布雷顿循环的二氧化碳热泵储能系统的循环效率提高了13.18%

基于朗肯循环的二氧化碳热泵储能系统的循环效率提高了11.09%。

Abstract

Carbon dioxide pumped thermal energy storage systems do not require the storage of carbon dioxide

eliminating the dependency on large gas storage facilities. Different types of carbon dioxide pumped thermal energy storage systems exhibit various performance. In view of this

a comparative study of the thermodynamic performance of carbon dioxide pumped thermal energy storage systems based on the Brayton cycle and the Rankine cycle was conducted. The parameters of both systems were optimized according to the results of the sensitivity analysis. Results show that under basic operating conditions

the Rankine cycle-based carbon dioxide pumped thermal energy storage system has a higher cycle efficiency of 51.86%

and reducing the inlet pressure and compression ratio of the high-temperature compressor can enhance its cycle efficiency. The Brayton cycle-based carbon dioxide pumped thermal energy storage system has a higher energy storage density of 7.05 kW·h/m3

and increasing the inlet temperature of the high-temperature compressor can improve its cycle efficiency. After parameter optimization

the cycle efficiency of the Brayton cycle-based carbon dioxide pumped thermal energy storage system increases by 13.18%

while the cycle efficiency of the Rankine cycle-based system increases by 11.09%.

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