Review of new gravity energy storage

doi:10.19799/j.cnki.2095-4239.2021.0590

Abstract

Abstract:

With the continuous development of renewable energy sources, there is a growing demand for various energy storage technologies for power grids. Gravity energy storage is a kind of physical energy storage with competitive environmental and economic performance, which has received more and more attention in recent years. This paper introduces the working principle and energy storage structure of gravitational potential energy storage as a physical energy storage method, analyzes in detail the new pumped energy storage, gravitational energy storage system based on structure height difference, based on mountain drop, based on underground shaft and integrated energy storage system, introduces the research status of gravitational energy storage and demonstration projects at home and abroad, summarizes and analyzes the advantages and shortcomings of various energy storage structures, and finally looks forward to the gravitational energy storage Finally, the development prospect of gravity energy storage is prospected, and development suggestions are put forward.

Key words: physical energy storage, gravity potential energy, water medium, solid medium

CLC Number:

TK 02

Su WANG, Liye XIAO, Wenbing TANG, Jingye ZHANG, Qingquan QIU, Wenyong GUO, Dong ZHANG. Review of new gravity energy storage[J]. Energy Storage Science and Technology, 2022, 11(5): 1575-1582.

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Table 1

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项目	储能密度/(kWh/m³)	功率	储能量	效率/%	寿命/a	响应时间/s	适用场合
海下储能	—	5～6 MW	20 MWh	65～70	—	>10	海洋空间
活塞水泵GPM	1.6	40 MW～1.6 GW	1.6～6.4 GWh	75～80	30+	>10	城市中小功率储能
活塞水泵HHS/GBES	—	20 MW～2.75 GW	1～20 GWh	80	40+	>10	地质坚硬地区
储能塔Energy Vault	>1	4 MW	35 MWh	90	—	2.9	可灵活选址
斜坡机车ARES	>1	50 MW	12.5 MWh	75～86	40+	秒钟级	山地地形
斜坡缆车MGES	>1	500 kW	0.5 MWh	75～80	—	秒钟级	山地地形
地下竖井Gravitricity	>1	<40 MW	1～20 MWh	80～85	50+	秒钟级	废弃矿井