The structure and control strategies of hybrid solid gravity energy storage system

Tong, Wenxuan; Lu, Zhengang; Zhao, Haisen; Han, Minxiao; Zhao, Guoliang; Hunt, Julian David

doi:10.1016/j.est.2023.107570

Cited by 17 publications

(2 citation statements)

References 27 publications

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“…The higher the height, the greater the potential energy, and the greater the mass, the greater the energy change. The stored potential energy is then converted into electricity by spinning a generator when the mass is lowered to its initial position [30].…”

Section: Gravity Underground Energy Storage (Ges)mentioning

confidence: 99%

New Uses for Coal Mines as Potential Power Generators and Storage Sites

Pous de la Flor,

Pous Cabello,

Castañeda

et al. 2024

Energies

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In the context of sustainable development, revitalising the coal sector is a key challenge. This article examines how five innovative technologies can transform abandoned or in-use coal mines into sustainable energy centres. From solar thermal to compressed air energy storage, these solutions offer a path to a more sustainable future while addressing the decline in coal production. This approach not only promotes energy efficiency but also contributes to the mitigation of environmental impacts, thus consolidating the transition to a more responsible energy model. Thus, in this document, the reader can find the explanation of why we have opted for these technologies and not other existing ones. In addition, the economic, environmental and technical feasibility of the different technologies is analysed. Finally, real cases of the successful application of these technologies will be presented once they have gone beyond the project idea phase, and the reasons why we are calling for their transposition to the coal industry in the search for its revitalisation will be explained.

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Section: Gravity Underground Energy Storage (Ges)mentioning

confidence: 99%

New Uses for Coal Mines as Potential Power Generators and Storage Sites

Pous de la Flor,

Pous Cabello,

Castañeda

et al. 2024

Energies

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“…The idea of GES has recently gained a lot of popularity. Although a large-scale GES is yet to be deployed due to high mechanical losses of the stored power (Tong et al, 2023), a few studies have already analyzed the economic feasibility of GES systems and have found that they can be more economical than batteries or chemical storage (Berrada, 2022;Berrada et al, 2021). However, no previous literature has delved into the social factors that can play a role in the CAPEX of GES plants.…”

Section: Introductionmentioning

confidence: 99%

Geospatial Optimization of Location-Dependent Costs for Gravity Energy Storage Plants in a Mountainous Suburban Area: The Case of Fukuoka City, Japan

Hoshino,

Basu,

Ogawa

et al. 2024

ETE

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<p class="MsoNormal" style="margin-top: 10pt; text-align: justify;"><span lang="EN-US" style="font-size: 14pt; font-family: 'times new roman', times, serif;">Gravity Energy Storage (GES) systems are recently being considered as a viable solution for storing intermittent renewable energy power, specifically in high curtailment zones. While a few studies have analyzed the material costs of GES systems, there is a paucity of literature on analyzing the socioeconomic costs of GES systems. This study analyzes the location-dependent costs of GES plants using a multi-factor spatial parameterization model for evaluating the existence of a point of minimum cost in a suburban mountainous geography. A case study of 500x500 points in a 50x50km2 area in the suburban area of Fukuoka city in Japan is performed. It is found that the cost of material transportation and transmission is more dominant in determining the position of an optimal cost location than factors of excavation and land costs. The position of the minima is also related to the principal urban area in that the line connecting the Center Business District (CBD) and suburban flat areas (line 1) is where the potential minima lie. The intersection point of an orthogonal to the line connecting the CBD with a substation nearest to the flat area with line 1, is the potential zone of minima location. The findings of this study are critical for urban energy planners and reveals how socioeconomic cost factors can aid in geolocation a suitable GES installation site.</span></p>

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Electric truck gravity energy storage: An alternative to seasonal energy storage

Hunt,

Jurasz,

Zakeri

et al. 2024

Energy Storage

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The global shift toward a sustainable and eco‐friendly energy landscape necessitates the adoption of long‐term, high‐capacity energy storage solutions. This research introduces an inventive energy storage concept involving the movement of granular materials from a lower elevation to a higher point within natural terrains such as mountains or excavated mining sites. Electrical energy is employed to charge electric batteries that elevate the granular material, thereby storing potential energy. Subsequently, this material is transported down during the electricity generation phase, and the regenerative braking mechanism converts the gravitational energy to replenish the vehicle's battery. The stored energy within these vehicles is then dispatched during peak demand periods or utilized by the vehicles for other freight transportation purposes. Our findings demonstrate a power cost of 1200 USD/kW, an energy storage expense spanning from 1 to 10 USD/kWh, a levelized cost of storage ranging from 35 to 200 USD/MWh, and a global annual potential of approximately 5.4 PWh. Electric vehicle gravity energy storage showcases its capability to bolster sustainable development by offering seasonal and multi‐year energy storage services.

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The structure and control strategies of hybrid solid gravity energy storage system

Cited by 17 publications

References 27 publications

New Uses for Coal Mines as Potential Power Generators and Storage Sites

New Uses for Coal Mines as Potential Power Generators and Storage Sites

Geospatial Optimization of Location-Dependent Costs for Gravity Energy Storage Plants in a Mountainous Suburban Area: The Case of Fukuoka City, Japan

Electric truck gravity energy storage: An alternative to seasonal energy storage

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