DOGES: Deep ocean gravitational energy storage

Cazzaniga, Raniero; Cicu, M.; Marrana, T.; Rosa-Clot, M.; Rosa-Clot, Paolo; Tina, Giuseppe Marco

doi:10.1016/j.est.2017.06.008

Cited by 27 publications

(9 citation statements)

References 11 publications

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“…There have been few attempts to construct commercial-scale underwater compressed air storage devices. It consists of a permanent storage location in the water, such as a lake or the ocean, and a compressor on land, above or underwater that pumps pressured air to the storage vessels [23]. Underwater CAES has been the subject of numerous research studies [24][25][26][27], and a current project implemented by Hydrostor has been put into practice in Toronto, Canada [28,29].…”

Section: Introductionmentioning

confidence: 99%

Compressed Air Seesaw Energy Storage - a Solution for Long-Term Electricity Storage

Hunt

Zakeri

Nascimento³

et al. 2022

SSRN Journal

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Section: Introductionmentioning

confidence: 99%

Compressed Air Seesaw Energy Storage - a Solution for Long-Term Electricity Storage

Hunt

Zakeri

Nascimento³

et al. 2022

SSRN Journal

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“…It works basically via a combination of solar, mechanical and hydrostatic input. In the system, when energy is supplied to the photovoltaic cell which floats on the ocean surface, it is used to power a turbine or pump situated on the ocean bed hat is used to force water out of a storage tank on the ocean bed [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…The system works basically by harnessing the influence of potential energy, where the maximum stored energy is the difference in potential energy between an empty and a filled tank. The system is obviously technologically and economically viable for locations around the deep oceans of sufficiently large depths reaching 500 m. But the challenges to its implementation and operation are mostly Cavitation, mooring effect (which has to do buoyancy effect on the storage structure when pipes are empty under the ocean) and hydro turbine management which are quite expensive to deal with [17,19].…”

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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“…Underwater ocean storage systems (UOSS) are designed to work with a renewable power plant floating in the sea (solar or wind energy) [58,59]. The system is a submerged vessel, a reversible turbine attached to the vessel, and an electrical cable that connects the turbine to the generating unit.…”

Section: Introductionmentioning

confidence: 99%

“…Water is pumped out of the vessel during the loading cycle and returns to the vessel when discharged. Cazzaniga et al [58] scaled a system with a volume of 360 m 3 to a depth of 1000 m, and the estimated storage capacity was 984 kWh with 90% efficiency. Meanwhile, Slocum et al [59] presented larger scale systems (some GWh) with 65%-70% efficiency.…”

Section: Introductionmentioning

confidence: 99%

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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DOGES: Deep ocean gravitational energy storage

Cited by 27 publications

References 11 publications

Compressed Air Seesaw Energy Storage - a Solution for Long-Term Electricity Storage

Compressed Air Seesaw Energy Storage - a Solution for Long-Term Electricity Storage

Gravitricity based on solar and gravity energy storage for residential applications

Storage Gravitational Energy for Small Scale Industrial and Residential Applications

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