Simulation of a horizontal axis tidal turbine for direct driven reverse-osmosis desalination

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Abstract

Desalination of seawater from renewable energy sources is without doubt an appealing solution to face water scarcity issues in coastal areas. In particular, tidal energy technologies offer high potential to be integrated with existing desalination technologies. This paper contributes to the idea of using a horizontal axis tidal turbine for direct driven reverse-osmosis seawater desalination without intermediate electrical power conversion. In combination with a positive displacement pump and RO membranes, a back-pressure valve is employed at the brine exit to induce a suitable pressure in the system while keeping a variable speed operation of the rotor. A time-domain numerical model is used to simulate and compare the dynamic response of a passive and an active controlled valve configuration. Intermediate results are given for a 300 kW system under turbulent current conditions.
Original languageEnglish
Title of host publicationAdvances in Renewable Energies Offshore - Proceedings of the 3rd International Conference on Renewable Energies Offshore - RENEW 2018
EditorsC. Guedes Soares
PublisherCRC Press / Balkema - Taylor & Francis Group
Pages181-188
ISBN (Print)9781138585355
Publication statusPublished - 2019
Event3rd International Conference on Renewable Energies Offshore, RENEW 2018 - Lisbon, Portugal
Duration: 8 Oct 201810 Oct 2018

Conference

Conference3rd International Conference on Renewable Energies Offshore, RENEW 2018
CountryPortugal
CityLisbon
Period8/10/1810/10/18

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