Energy Storage Science and Technology ›› 2017, Vol. 6 ›› Issue (1): 25-42.doi: 10.12028/j.issn.2095-4239.2016.0014

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Seawater pumped hydro energy storage: Review and perspectives

TAN Yaqian1,2, ZHOU Xuezhi1, XU Yujie1, CHEN Haisheng1, QIN Wei3   

  • Received:2016-05-05 Revised:2016-06-06 Online:2017-01-03 Published:2017-01-03

Abstract: Pumped hydro energy storage (PHES) is one of most widely used large-scale energy storage technologies. The traditional pumped hydro energy storage technology requires specific geographic conditions to construct the upper and lower reservoirs, leading to a high investment, damages to the ecological environment and heavily dependence on the use of fresh water. Seawater pumped hydro energy storage (SPHES) technology uses seawater, and the sea as the upper or the lower reservoir. The advantages of such technology include small variation of water level, low construction cost and small influence on environment, and therefore has great potential for applications in islands where fresh water is lacking. This paper will first explain the working principles of the SPHES technology, followed by a review of the state-of-the-art development in the area. Finally, potential applications in China and associated challenges are discussed.

Key words: energy storage, seawater pumped hydro energy storage, island, reservoir