Technical economic characteristics and development trends of compressed air energy storage

doi:10.19799/j.cnki.2095-4239.2022.0645

Abstract

Abstract:

In recent years, compressed air energy storage (CAES) has garnered much research attention as an important type of new energy storage. Since 2021, several 10 MW CAES projects were completed and connected to power systems. This technology has gradually matured and industrialized. In this study, the main technology roadmaps and four key parts of CAES are briefly introduced. Then the study focuses on advanced adiabatic CAES (AA-CAES), which is currently the most widely used technology. After the technical and economic data of the existing and planning projects are analyzed, the characteristics and development trends of CAES are summarized. With respect to its technical aspects, CAES has long operation lifespan, system-friendly performance, and low security risk. In the future, CAES can be developed in a larger scale, with improved efficiency and increased system application. With respect to its economic aspects, CAES has relatively high cost of construction. With further development in the industry and progress in technology, CAES based on salt-cave-air-storage and artificial-chamber-air-storage will be cheaper than the current large-and-middle-sized pumped storage, and CAES based on pipeline-steel-air-storage may become as cheap as small-and-middle-sized pumped storage of comparable scale. In the end, this paper discusses the investment payback of CAES. Under the current market environment, CAES projects can hardly receive reasonable profits. Therefore, there is a need for supporting policies. Thus, it is recommended that policies can first be implemented on several demonstration projects and then price support can be offered to a certain extent.

Key words: compressed air energy storage, technical and economic analysis, development trend

CLC Number:

TK 02

Weiling ZHANG, Han GU, Chao ZHANG, Ang GE, Yuanxu YING. Technical economic characteristics and development trends of compressed air energy storage[J]. Energy Storage Science and Technology, 2023, 12(4): 1295-1301.

Figures/Tables 3

References 21

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造价水平/(元/kW)	系统效率/%	度电成本/(元/kWh)
8000	65	0.7
6000	70	0.53
5000	75	0.44

电站类型	项目位置	投产时间	单位千瓦投资/元	容量电价(含税)/[元/(kW⋅年)]
抽水蓄能	江西	2016	4300	568
	江苏	2017	5933	618
	海南	2018	5767	730
压缩空气储能	—	—	8000	1000
	—	—	6000	750
	—	—	5000	620

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