A New Energy Storage System Coupled with Compressed Air and Pumped-Hydro Energy Storage and Related Thermodynamic Analysis

LI Chengchen; HE Xin; TAO Feiyue; WANG Huanran

doi:10.7652/xjtuxb202204005

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A New Energy Storage System Coupled with Compressed Air and Pumped-Hydro Energy Storage and Related Thermodynamic Analysis

更新时间：2025-07-09

- A New Energy Storage System Coupled with Compressed Air and Pumped-Hydro Energy Storage and Related Thermodynamic Analysis
- Vol. 56, Issue 4, Pages: 40-49+71(2022)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202204005
  CLC： TK02
- Online First：10 April 2022，
  
  Published：2022
- 稿件说明：
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LI Chengchen, HE Xin, TAO Feiyue, et al. A New Energy Storage System Coupled with Compressed Air and Pumped-Hydro Energy Storage and Related Thermodynamic Analysis[J]. 2022, 56(4): 40-49+71.
DOI：

LI Chengchen, HE Xin, TAO Feiyue, et al. A New Energy Storage System Coupled with Compressed Air and Pumped-Hydro Energy Storage and Related Thermodynamic Analysis[J]. 2022, 56(4): 40-49+71. DOI： 10.7652/xjtuxb202204005.

摘要

提出一种压缩空气与抽水蓄能耦合的新型储能系统

包括压缩空气部分(CAES)和抽水压缩空气部分(PHCA)

可实现压力能的梯级利用

改善两部分的各自运行工况

具有较高的电-电转化效率

同时也为浅层废弃隧道及洞穴利用提供了新途径。针对该系统的结构特点

首先对系统进行了热力学分析

分析表明:新型系统的电-电转化效率为53.82%

能量转化效率为41.06%; PHCA部分具有较高的效率

CAES部分具有较高的容量和储能密度。随后

对能量运转较为复杂的CAES部分进行了分析

结果表明:CAES部分的主要输入能量来自于压缩机(76.05%)

最大损失发生在高压储气空间的节流(23.33%)和蓄热器的蓄热(22.9%)过程。最后

对该系统进行了敏感性分析

结果表明:增加两储气空间的压力差和提升再热温度均可以提升系统的性能

而提升再热温度的收益最大

系统的电-电转化效率最高可达77%。

Abstract

The subject in this paper is a new energy storage system coupled with compressed air and pumped-hydro energy storage

including the compressed air energy storage(CAES)part and pumped-hydro compressed air(PHCA)part. With this new energy storage system

graded utilization of pressure energy could be realized

and the operating conditions of the two parts could be improved. It has high electricity-electricity conversion efficiency

and provides new ways for the utilization of shallow waste tunnels and caves. For its structural characteristics

we performed thermodynamic analysis first

and the result shows that the new system is with electricity-electricity conversion efficiency of 53.82%

and energy conversion efficiency of 41.06%; The PHCA part has higher efficiency and the CAES part has higher capacity and energy density; Then

we performed exergy analysis on the CAES part with complex energy flow

and the result shows that the main input energy of the CAES part is from the compressor(76.05%)

and the maximum loss occurs in the throttling(23.33%)of the high pressure air storage space and the heat storage(22.90%)process of the accumulator; Finally

we performed a sensitivity analysis on the system

and the result shows that increasing the pressure difference between the two storage spaces and the reheat temperature can improve the performance of the system

among which increasing the reheat temperature contributes the most. The electricity-electricity conversion efficiency of the system could be up to 77%.

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