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A computational study on system dynamics of an ocean current turbine

Journal of Hydrodynamics 2018年第3期30卷 395-402页

作者： Jo-Ti Wu Jiahn-Homg Chen Ching-Yeh Hsin Fomg-Chen Chiu Department of Systems Engineering and Naval Architecture National Taiwan Ocean University Keelung China Department of Engineering Science and ocean Engineering National Taiwan University Taipei China

In this paper, we present the study of system dynamics of the floating kuroshio turbine（FKT） system which is designed to harness ocean current energy. We focus on the mooring line system design and its interaction with the FKT system. The effects of line diameter and two different auxiliary line systems were studied. Their responses in waves were also investigated. We integrated several commercial and in-house packages. The system buoyancy and weight and their centers were estimated using the Rhino software. The system hydrodynamic coefficients were obtained through WAMIT, system drag coefficient through FLUENT, turbine propulsive force through lifting surface code, and system dynamics through Orca Flex. The results show that the mooring line system can create strong influence on the FKT system operations in the ocean current environments.

关键词： ocean current energy current turbine system dynamics mooring line system

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Hydrodynamic consideration in ocean current turbine design

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Journal of Hydrodynamics 2016年第6期28卷 1037-1042页

作者：陈建宏邱逢琛辛敬业蔡进发 Department Systems Engineering and Naval Architecture National Taiwan Ocean University Department Engineering Mechanics and ocean Engineering National Taiwan University

ocean currents are one of important resources of ocean energy. Although it is not widely harnessed at present, ocean current power has a vital potential for future electricity generation. In fact, several turbine systems have been proposed in the world. In the present, we consider what factors should be considered in designing the system from the perspective of hydrodynamics. As an example, a floating Kuroshio turbine system which is under development in Taiwan is employed to serve as the case study. The system consists of five major parts; i.e. a foil float which can be employed to adjust the system submergence depth, a twin contrarotating turbine system for taking off the current energy, two nacelles housing power generators, a cross beam to connect two nacelle-and-turbine systems, and two vertical support to connect the foil float and the rest of the system.

关键词： ocean current energy renewable energy system dynamics rotor design floating turbine

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Experimental study on the optimum design of diffuser-augmented horizontal-axis tidal turbine

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Clean energy 2022年第5期6卷 776-786页

作者： Evi Elisa Ambarita Harinaldi Rifqi Azhari Ridho Irwansyah Department of Mechanical Engineering Universitas IndonesiaKampus UI Depok 16424Indonesia

ocean current energy is a promising and reliable resource that offers sustainability and predictability in realizing green future needs.A diffuser-augmented horizontal-axis turbine is utilized to generate ocean current energy.A numerical study on the impact of diffuser angle variations on the power coefficient has been carried out in the previous *** elucidate the fluid dynamics aspects and further validation of previous computational results,the experimental investigation on the optimal design of tidal turbine with 20.04°diffuser augmentation is presented in this *** study was conducted in a flowing tank with a current velocity of 0.7 m/*** maximum power coefficient of 20.04°is 0.436 experimentally,which is a little smaller than the numerical ***,to reinforce the 20.04°result,a diffuser with an angle of 10.43°was also manufactured and tested *** maximum power coefficient of 10.43°is 0.303 experimentally,which is 3%smaller than the numerical *** was concluded that the numerical approach might be considered satisfactory and represent similar phenomena to the experimental investigation in an application for modelling of multi-objective optimization.

关键词： ocean current energy tidal turbine diffuser augmentation power coefficient experimental study

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