Development and testing of a novel offshore pumped storage concept for storing energy at sea − Stensea

Puchta, Matthias; Bard, Jochen; Dick, Christian; Hau, Daniel; Krautkremer, Bernd; Thalemann, Fabian; Hahn, H.

doi:10.1016/j.est.2017.06.004

Cited by 34 publications

(20 citation statements)

References 3 publications

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“…They showed that the concept was techno‐economically feasible and thus promising for offshore energy storage . In 2017, a pilot experiment was successfully conducted in Lake Constance at a depth of 100 m with a 3‐m diameter (1:10 scaled) concrete sphere storage tank.…”

Section: Mre Storagementioning

confidence: 99%

“…85,86 Similar to the ORES concept, the StEnSea concept was developed by Fraunhofer Institute for Wind Energy and Energy System Technology, see Figure 7. 87 In 2017, a pilot experiment was successfully conducted in Lake Constance at a depth of 100 m with a 3-m diameter (1:10 scaled) concrete sphere storage tank. A full-cycle efficiency of 38.7%, about the half of the theoretical value of 73%, was achieved with this small-scale prototype.…”

Section: Subsea Phsmentioning

confidence: 99%

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A review of marine renewable energy storage

et al. 2019

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Summary Marine renewable energies are promising enablers of a cleaner energy future. Some technologies, like wind, are maturing and have already achieved commercial success. Similar to their terrestrial counterparts, marine renewable energy systems require energy storage capabilities to achieve the flexibility of the 21st century grid demand. The unique difficulties imposed by a harsh marine environment challenge the unencumbered rise of marine renewable energy generation and storage systems. In this study, the fundamentals of marine renewable energy generation technologies are briefed. A comprehensive review and comparison of state‐of‐the‐art novel marine renewable energy storage technologies, including pumped hydro storage (PHS), compressed air energy storage (CAES), battery energy storage (BES), hydrogen energy storage (HES), gravity energy storage (GES), and buoyancy energy storage (ByES), are conducted. The pros and cons, and potential applications, of various marine renewable energy storage technologies are also compiled. Finally, several future trends of marine renewable energy storage technologies are connoted.

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Section: Mre Storagementioning

confidence: 99%

Section: Subsea Phsmentioning

confidence: 99%

A review of marine renewable energy storage

et al. 2019

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“…In recent years, offshore underwater PHS [4], [5] has been proposed as an efficient method to store large amounts of energy, and is described as an emerging technology with significant potential, see the reviews [6], [7]. To store electrical energy, water-filled spheres of volume V are evacuated by pumping the water out against the high pressure p of the water surrounding the spheres deep undersea.…”

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confidence: 99%

“…The StEnSEA project plans to use concrete spheres of outer diameter 34 m and wall thickness 2.7 m, each with a mass of about 12 000 tons, installed at depth H = 750 m at the bottom of the ocean, which must be flat to better than one degree [5]. With a round-trip efficiency of 73%, the storage capacity then is E =18 MWh per sphere [4,5]. In a full-scale offshore PHS system, farms of large numbers of spheres are planned.…”

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confidence: 99%

Comparison of underwater with conventional pumped hydro-energy storage systems

Dubbers

2021

Journal of Energy Storage

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“…2 of Ref. [4], because the system should be installed on a horizontal sea ground with depths limited to 600 to 800 m, and should be close both to offshore wind farms in shallow waters and to the onshore electrical grid. In contrast, locations for modular systems installed onshore at a steep coast abound, as a look onto the world's coast lines on topographic maps reveals.…”

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confidence: 99%