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Offshore hydroelectric plant: A techno-economic analysis of a renewable energy source

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  • Nazir, Cawas Phiroze

Abstract

In a world where fossil fuel prices are subject to steep price hikes and where green house emissions are endangering the planet, dependence on non-renewable energy sources becomes more urgent. In this paper a technical feasibility and economic viability study of a new technology that utilizes hydroelectric power to tap the oceans׳ enormous energy reserve is presented. Called the Offshore Hydroelectric Plant, such an installation has an underwater powerhouse, the water from the turbines being discharged into a tail race sump (TRS). Power is generated when suitable head is created between the TRS and the sea, by leading the water out and allowing it to flow into giant troughs located in a vertical elevator building. Here, hoists raise the troughs carrying the excess water and empty them into an overhead tank (OHT). Water from the OHT is carried by penstocks to another powerhouse located at sea level. The plant utilizes the existing technologies of tidal plants, vertical ship lifts, and pumped storage schemes. Well-developed technologies of the offshore oil industry are utilized in fabricating the structures on shore, and towing them to location. An example demonstrates that a 104MW plant could produce 569GWh annually. Project investment costs are approximately $ 432 million and Levelized Electricity Costs $0.055/kWh.

Suggested Citation

  • Nazir, Cawas Phiroze, 2014. "Offshore hydroelectric plant: A techno-economic analysis of a renewable energy source," Renewable and Sustainable Energy Reviews, Elsevier, vol. 34(C), pages 174-184.
    • Handle: RePEc:eee:rensus:v:34:y:2014:i:c:p:174-184
    DOI: 10.1016/j.rser.2014.03.006
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    References listed on IDEAS

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    1. Panwar, N.L. & Kaushik, S.C. & Kothari, Surendra, 2011. "Role of renewable energy sources in environmental protection: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(3), pages 1513-1524, April.
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    1. Bao, Bin & Chen, Wen & Wang, Quan, 2019. "A piezoelectric hydro-energy harvester featuring a special container structure," Energy, Elsevier, vol. 189(C).
    2. Huh, Sung-Yoon & Lee, Jongsu & Shin, Jungwoo, 2015. "The economic value of South Korea׳s renewable energy policies (RPS, RFS, and RHO): A contingent valuation study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 64-72.
    3. Dimitrios N. Konispoliatis & Georgios M. Katsaounis & Dimitrios I. Manolas & Takvor H. Soukissian & Stylianos Polyzos & Thomas P. Mazarakos & Spyros G. Voutsinas & Spyridon A. Mavrakos, 2021. "REFOS: A Renewable Energy Multi-Purpose Floating Offshore System," Energies, MDPI, vol. 14(11), pages 1-28, May.

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