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Energies 2016, 9(3), 185; doi:10.3390/en9030185

Shape Design of the Duct for Tidal Converters Using Both Numerical and Experimental Approaches (pre-2015)

Department of Naval Architecture and Ocean Engineering, Inha University, Incheon 22212, Korea
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Author to whom correspondence should be addressed.
Academic Editor: Jang-Ho Lee
Received: 23 December 2015 / Revised: 22 February 2016 / Accepted: 29 February 2016 / Published: 11 March 2016
(This article belongs to the Special Issue Selected Papers from 5th Asia-Pacific Forum on Renewable Energy)
View Full-Text   |   Download PDF [3950 KB, uploaded 11 March 2016]   |  

Abstract

Recently, focus has been placed on ocean energy resources because environmental concerns regarding the exploitation of hydrocarbons are increasing. Among the various ocean energy sources, tidal current power (TCP) is recognized as the most promising energy source in terms of predictability and reliability. The enormous energy potential in TCP fields has been exploited by installing TCP systems. The flow velocity is the most important factor for power estimation of a tidal current power system. The kinetic energy of the flow is proportional to the cube of the flow’s velocity, and velocity is a critical variable in the performance of the system. Since the duct can accelerate the flow velocity, its use could expand the applicable areas of tidal devices to relatively low velocity sites. The inclined angle of the duct and the shapes of inlet and outlet affect the acceleration rates of the flow inside the duct. In addition, the volume of the duct can affect the flow velocity amplification performance. To investigate the effects of parameters that increase the flow velocity, a series of simulations are performed using the commercial computational fluid dynamics (CFD) code ANSYS-CFX. Experimental investigations were conducted using a circulation water channel (CWC). View Full-Text
Keywords: tidal current power (TCP); duct; circulation water channel (CWC); horizontal axis tidal turbine; ocean energy; experiment tidal current power (TCP); duct; circulation water channel (CWC); horizontal axis tidal turbine; ocean energy; experiment
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Jo, C.H.; Kim, D.Y.; Hwang, S.J.; Goo, C.H. Shape Design of the Duct for Tidal Converters Using Both Numerical and Experimental Approaches (pre-2015). Energies 2016, 9, 185.

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