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Session: Parallel Session: System Design, Optimization and Applications Ime
Session starts: Thursday 22 September, 11:10
Presentation starts: 11:10
Room: Senaatszaal

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Paola Bombarda (Dip. Energia Politecnico di Milano)
Mario Gaia (Turboden srl)
Costante Invernizzi (Dip. Ing. Meccanica e Industriale, Università degli Studi Brescia)

Abstract:
Among the renewable energy sources, Ocean Energy is encountering an increasing interest at present days. Several technologies can be applied in order to convert the ocean energy in electric power: in some areas power is produced by means of ad hoc developed turbines while in the equatorial and tropical belt the temperature difference between surface warm water and deep cold water allows the adoption of an OTEC system. Although the idea is very old (was first proposed in the late eighteen century) no commercial plant has been built. Nevertheless lot of studies are being conducted at present time and several prototypes are under construction. Some of the studies concern hybrid solar-ocean energy plants: in this case the ocean thermal gradient, which is usually comprised in the range 20-25 °C in the favourable belt, can be increased during day time. The present study performs firstly a review of the state of the art for OTEC plants, and is then focused on a hybrid plant with closed ORC cycle, by investigating the obtainable performance with different suitable working fluids both during day and night operations.