Capability study of dry gravity energy storage

Botha, C.D.; Kamper, Maarten J.

doi:10.1016/j.est.2019.03.015

Cited by 72 publications

(22 citation statements)

References 37 publications

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“…This system is based on the same principle of working as Gravitricity [75], as a solution for improving quality and energy saving. However, unlike the studies found in the literature and presented in Section 2, this paper aims at small-scale end-use, i.e., small industry and residential use, without the requirement of a mine as seen in the works of Botha and Kamper [40] and Morstyn et al [80].…”

Section: Small Scale Energy Storage: Modeling the Systemmentioning

confidence: 99%

“…Two materials were selected for the piston: iron, and concrete, with densities of 7850 and 3150 kg/m 3 , respectively [63,80]. Berrada et al [63] and Botha and Kamper [40], presented that iron showed better relative density and cost ratio when compared to other options.…”

Section: Storage System Characteristics and Applicationsmentioning

confidence: 99%

“…The works of Botha and Kamper [40] and Morstyn et al [80] present the sizing and modeling of Gravitricity storage systems. Botha and Kamper [40] provide the modeling of a gravitational energy storage (GES) system in abandoned mines and analyze two lifting methods, the conventional and electric machines. GES has energy density between 0.2 and 3.1 Wh/L, power density between 0.3 and 30 W/L, energy rating 10 7 Wh, power rating 2•10 7 W, discharge time 0.5 h, 50 year lifetime, and 85% round-trip efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…The work of Botha and Kamper [40] indicates that storage capacity is limited by both the system height and the piston mass that is hoisted, meaning that it does not have high energy storage like other gravitational energy-based storage systems. The low energy density combined with low discharge time and high power density indicates that GES is best suited for high power and distributed generation services.…”

Section: Introductionmentioning

confidence: 99%

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Storage Gravitational Energy for Small Scale Industrial and Residential Applications

2019

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Photovoltaic cells produce electric energy in a short interval during a period of low demand and show high levels of intermittency. One of the well-known solutions is to store the energy and convert it into a more stable form, to transform again into electricity during periods of high demand, in which the energy has a higher value. This process provides economic viability for most energy-storage projects, even for the least efficient and most common, such as batteries. Therefore, this paper aims to propose a storage system that operates with gravitational potential energy, considering a small-scale use. The development of this methodology presents the mathematical modeling of the system and compares the main characteristics with other systems. The dimensions of the considered system are 12-m shaft, 5-m piston height, and 4 m of diameter; it presented an energy storage of 11 kWh. Also, it has an efficiency of about 90%, a lifetime of 50 years, and higher storage densities compared to other systems.

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Section: Small Scale Energy Storage: Modeling the Systemmentioning

confidence: 99%

Section: Storage System Characteristics and Applicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Storage Gravitational Energy for Small Scale Industrial and Residential Applications

2019

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“…This system is economically efficient in the sense that it does not require fossil fuels or special regulations (difference in height) unlike the pumped gravity hydro [9]. In addition, it does not use the expansion of gas turbines and air turbines.…”

Section: Introductionmentioning

confidence: 99%

Gravitricity based on solar and gravity energy storage for residential applications

Bowoto

Emenuvwe

Azadani

2021

Int J Energy Environ Eng

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This study proposes a design model for conserving and utilizing energy affordably and intermittently considering the wind rush experienced in the patronage of renewable energy sources for cheaper generation of electricity and the solar energy potential especially in continents of Africa and Asia. Essentially, the global quest for sustainable development across every sector is on the rise; hence, the need for a sustainable method of extracting energy cheaply with less wastage and pollution is on the priority list. This research, integrates and formulates different ideologies, factors and variables that have been adopted in previous research studies to create an efficient system. Some of the aforementioned researches includes pumped hydro gravity storage system, Compressed air gravity storage system, suspended weight in abandoned mine shaft, dynamic modelling of gravity energy storage coupled with a PV energy plant and deep ocean gravity energy storage. As an alternative and a modification to these systems, this research is proposing a Combined solar and gravity energy storage system. The design synthesis and computational modelling of the proposed system model were investigated using a constant height and but varying mass. Efficiencies reaching up to 62% was achieved using the chosen design experimental parameters adopted in this work. However, this efficiency can be tremendously improved upon if the design parameters are modified putting certain key factors which are highlighted in the limitation aspect of this research into consideration. Also, it was observed that for a test load of 50 × 103 mA running for 10 h (3600 s), the proposed system will only need to provide a torque of 3.27Nm and a height range of 66.1 × 104 m when a mass of 10 kg is lifted to give out power of 48 kwh. Since gravity storage requires intermittent actions and structured motions, mathematical models were used to analyse the system performance characteristics amongst other important parameters using tools like MATLAB Simscape modelling toolbox, Microsoft excel and Sysml Model software.

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Solar PV driven hybrid gravity power module—Vanadium redox flow battery energy storage for an energy efficient multi‐storied building

Mondal

Mandal

Datta

2022

Intl J of Energy Research

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Summary This article presents an innovative perspective of using a gravity energy storage system namely gravity power module (GPM) around a multi‐storied building. Two number of GPMs have been vertically fixed around the walls of a multi‐storied building and have not been placed underground following the traditional way. The grid‐connected proposed hybrid system consisting of solar PV, GPMs and vanadium redox flow battery is focused to supply the maximum possible amount of an essential load of a high‐riser, through renewable energy. All of the storage systems are charged through solar PV. Whereas, the grid is used, to procure energy for the unmet load demand and sell the excess renewable energy. Results simulated for each month following seasonal load variation show that net energy supplied by the hybrid system is 99% of the full load demand of essential equipment of the building for the month of February and 90% to 91% for the month of January, November and December. During all the months, the supply of gravity energy storage is restricted to supply within the 18th to 24th hour to reduce the peak demand of the grid. The gravity energy storage is also considered as the primary storage system during those intervals. The yearly average of energy supply from the renewable resource in the proposed system toward the building load is found to be 47.77%. While considering the renewable energy sale toward the grid along the load supply of the building the yearly average of renewable energy penetration becomes 48.89%.

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Capability study of dry gravity energy storage

Cited by 72 publications

References 37 publications

Storage Gravitational Energy for Small Scale Industrial and Residential Applications

Storage Gravitational Energy for Small Scale Industrial and Residential Applications

Gravitricity based on solar and gravity energy storage for residential applications

Solar PV driven hybrid gravity power module—Vanadium redox flow battery energy storage for an energy efficient multi‐storied building

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