A Novel Transcritical CO<sub>2</sub> Energy Storage System

doi:10.7652/xjtuxb201603007

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A Novel Transcritical CO₂ Energy Storage System

更新时间：2025-07-09

- A Novel Transcritical CO₂ Energy Storage System
- Vol. 50, Issue 3, Pages: 45-49+100(2016)
- 作者机构：
  
  西安交通大学叶轮机械研究所,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201603007
  CLC： TK02
- Online First：10 March 2016，
  
  Published：2016
- 稿件说明：
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A Novel Transcritical CO₂ Energy Storage System[J]. 2016, 50(3): 45-49+100. DOI: 10.7652/xjtuxb201603007.
DOI：

A Novel Transcritical CO₂ Energy Storage System[J]. 2016, 50(3): 45-49+100. DOI: 10.7652/xjtuxb201603007. DOI：

摘要

为了解决我国风电并网时电力不稳定等问题

实现规模储能

针对目前压缩空气储能(CAES)系统存在的问题

提出了一种新型的跨临界CO

储能系统概念。系统储能介质CO

以液态形式进行储存

以热能和冷能为能量存储主要形式

实现风电的储能和释能过程。对该系统进行了热力学分析和多目标优化

结果表明:在合适的储能压力下

系统储能效率和储能密度均随着释能压力的增大先增大后减小

分别存在最佳释能压力; 随着储能压力升高

系统储能效率不断降低

储能密度却不断增加; 减小蓄冷器和中间换热器换热温差是提高系统储能效率的关键; 通过对储能系统进行多目标优化

最优解对应的系统储能效率为50.4%

储能密度为21.7 kW·h/m

。跨临界CO

储能系统具有储能密度较高、绿色高效、不受地理条件限制等优点

在风电的规模存储中具备很好的应用前景。

Abstract

To ensure grid frequency and power stability and realize bulk energy storage

a novel transcritical CO

energy storage system was proposed in view of the defects in the existing compressed air energy storage systems. The concept is based on taking liquid CO

as the storage media

thermal energy and cold energy as the main storage forms

so as to realize charging and discharging processes for wind power. Thermodynamic analysis and multi-objective optimization were performed and results showed that both round-trip efficiency and energy density increase firstly and then decline with the increase of discharging pressure at suitable charging pressure

which means that there exists an optimal discharging pressur

e. As charging pressure increases

round-trip efficiency declines while energy density increases. The key approach to improve the round-trip efficiency is to decrease the heat transfer temperature differences of cool storage unit

intercooler and reheater. The optimum round-trip efficiency and energy density are 50.4% and 21.7 kW·h/m

respectively. The transcritical CO

energy storage system has advantages such as high energy density

high-efficiency and environment friendly

no geographical restriction

showing a promising potential for storing wind power in large scale.

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Keywords

references

刘佳, 夏红德, 陈海生, 等. 新型液化空气储能技术及其在风电领域的应用 [J]. 工程热物理学报, 2010, 31(12): 1993-1996.

LIU Jia, XIA Hongde, CHEN Haisheng, et al. A novel energy storage technology based on liquid air and its application in wind power [J]. Journal of Engineering Thermophysics, 2010, 31(12): 1993-1996.

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LI Maoqing, WANG Jiangfeng, LI Saili, et al. Thermo-economic analysis and comparison of a CO2 transcritical power cycle and an organic Rankine cycle [J]. Geothermics, 2014, 50: 101-111.

WANG Xurong, WU Yi, WANG Jiangfeng, et al. Thermo-economic analysis of a recompression supercritical CO2 cycle combined with a transcritical CO2 cycle [C]∥ASME Turbo Expo 2015: Turbine Technical Conference and Exposition.New York,USA: ASME, 2015: GT2015-42033.

王亮, 陈海生, 刘金超, 等. 高压液态空气储能/释能系统: 中国, CN 102758748 A [P]. 2012-10-31.

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⁰

A Novel Transcritical CO2 Energy Storage System

DOI：10.7652/xjtuxb201603007

摘要

Abstract

关键词

Keywords

references

A Novel Transcritical CO₂ Energy Storage System