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Hydrostatic pressure plants for desalination via reverse osmosis

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  • Charcosset, C.
  • Falconet, C.
  • Combe, M.

Abstract

Renewable energies (solar and wind energies) associated to reverse osmosis (RO) are gaining renewed interest for brackish and seawater desalination. Another potential source of energy is the hydrostatic pressure at a sufficient operative depth or height to perform the RO process. This article provides a comparison of the energy requirement of various hydrostatic pressure-RO plants. For submarine and underground plants, the required energy is equal to 2.98 and 3.54kWh, respectively, for 1m3 of produced fresh water. In case of hydrostatic pressure generated by a column of water due to a head difference between the sea level and an adjacent mountain, the energy required is equal to 1.4kWh. These energy requirements compare well with the usual energy requirement for desalination, between 3 and 10kWh for 1m3 of produced fresh water. However, the main drawback associated with hydrostatic pressure plants relates to their construction and their maintenance, which are expected to be more complicated and costly than for a ground plant.

Suggested Citation

  • Charcosset, C. & Falconet, C. & Combe, M., 2009. "Hydrostatic pressure plants for desalination via reverse osmosis," Renewable Energy, Elsevier, vol. 34(12), pages 2878-2882.
    • Handle: RePEc:eee:renene:v:34:y:2009:i:12:p:2878-2882
    DOI: 10.1016/j.renene.2009.02.026
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    1. Gocht, W. & Sommerfeld, A. & Rautenbach, R. & Melin, Th. & Eilers, L. & Neskakis, A. & Herold, D. & Horstmann, V. & Kabariti, M. & Muhaidat, A., 1998. "Decentralized desalination of brackish water by a directly coupled reverse-osmosis-photovoltaic-system - a pilot plant study in Jordan," Renewable Energy, Elsevier, vol. 14(1), pages 287-292.
    2. Vujčić, R & Krneta, M, 2000. "Wind-driven seawater desalination plant for agricultural development on the islands of the County of Split and Dalmatia," Renewable Energy, Elsevier, vol. 19(1), pages 173-183.
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    1. Fasano, Matteo & Morciano, Matteo & Bergamasco, Luca & Chiavazzo, Eliodoro & Zampato, Massimo & Carminati, Stefano & Asinari, Pietro, 2021. "Deep-sea reverse osmosis desalination for energy efficient low salinity enhanced oil recovery," Applied Energy, Elsevier, vol. 304(C).

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