Design optimisation and cost analysis of linear vernier electric machine-based gravity energy storage systems

Botha, C.D.; Kamper, Maarten J.; Wang, Rong‐Jie

doi:10.1016/j.est.2021.103397

Cited by 18 publications

(4 citation statements)

References 18 publications

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“…It shares certain similarities with PHS but diverges by employing solid materials, rather than water, as the elevated mass for the conversion of energy between gravitational potential and electricity 26 . Botha et al have provided a summary of prevailing gravity energy storage proposals, as depicted in Figure 1 27 . Notable alternatives, such as Mountain Gravity Energy Storage 28 and Advanced Rail Energy Storage 29 and, offer cost‐effective solutions for extended duration energy storage, characterized by favorable storage costs (measured in USD/kWh) relative to their power capacity costs (measured in USD/kW).…”

Section: Introductionmentioning

confidence: 99%

“…Energy storage technologies using gravity (A) Gravitricity, 31 (B) Sink Float Technology, 32 (C) Energy Vault, 33 (D) Advanced Rail Energy Storage (ARES), 29 (E) Mountain Gravity Energy Storage (MGES), 28 and (F) Linear Vernier Electric Machine‐Based Gravity Energy Storage (LEM‐GES). The figure is taken from reference 27.…”

Section: Introductionmentioning

confidence: 99%

“…26 Botha et al have provided a summary of prevailing gravity energy storage proposals, as depicted in Figure 1. 27 Notable alternatives, such as Mountain Gravity Energy Storage 28 and Advanced Rail Energy Storage 29 and, offer cost-effective solutions for extended duration energy storage, characterized by favorable storage costs (measured in USD/kWh) relative to their power capacity costs (measured in USD/kW). For a more in-depth exploration of this subject, Shan et al 30 underscores the necessity for increased innovation to enhance system flexibility and reduce land utilization.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Hunt,

Jurasz,

Zakeri

et al. 2024

Energy Storage

View full text Add to dashboard Cite

show abstract

“…The recently proposed linear electric machine gravity energy storage system (LEM-GESS) operates based on the principle of gravity, utilizing dry object masses to store electrical energy as potential energy at a given height h [10]. This innovative system, which has a potentially long lifespan, high charge-discharge capability, high thrust and low speed characteristics, has been thoroughly examined in [11]. The analysis revealed that the LEM-GESS exhibits economic fea-sibility, particularly in primary response application.…”

Section: Introductionmentioning

confidence: 99%

Performance and Cost Comparison of Drive Technologies for a Linear Electric Machine Gravity Energy Storage System

Mugyema,

Kamper,

Wang

et al. 2024

IEEE Access

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Energy storage is a crucial technology for facilitating the integration of renewable energy sources (RES), such as wind and solar energy, into the electrical grid. The challenge of maintaining a balance between incoming and outgoing grid power can be effectively addressed by integrating energy storage technologies with inherently intermittent RES. A range of viable options for storing energy from RES currently exists, among which the Linear Electric Machine Gravity Energy Storage System (LEM-GESS) stands out as a promising choice. The LEM-GESS stores energy in a shaft using piston masses based on the concept of gravity. This paper presents the performance and cost analysis of different linear machines employed as the main drive units in a dry gravity energy storage system. Specifically, linear permanent magnet flux switching machines demonstrate the best performance in terms of overall system cost when considering a 20 MW/10 MWh system and optimizing for the minimum levelized cost of storage (LCOS). Noteworthy findings reveal that the LEM-GESS cost is highly sensitive to system efficiency, with factors such as material cost and power factor also influencing the LCOS. Designs with modest secondary height, low usage of copper and magnet materials on the primary of the LEM, and a high power factor are preferred to minimize the LCOS. In conclusion, the LEM-GESS with a permanent magnet machine drive option is a highly promising and cost-effective technology for supporting the integration of RES into the grid.

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Mechanical Storage

Andújar Márquez,

Segura Manzano,

Rey Luengo

2023

Energy Storage Systems: Fundamentals, Classification and a Technical Comparative

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Design optimisation and cost analysis of linear vernier electric machine-based gravity energy storage systems

Cited by 18 publications

References 18 publications

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

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

Performance and Cost Comparison of Drive Technologies for a Linear Electric Machine Gravity Energy Storage System

Mechanical Storage

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