Duct and blade design for small-scale floating tidal current turbine development and CFD-based analysis of power performance

2020 ◽  
Vol 34 (4) ◽  
pp. 1591-1602
Author(s):  
Heejeon Im ◽  
Taegyu Hwang ◽  
Bumsuk Kim
Keyword(s):  
Tidal Current ◽  
Small Scale ◽  
Blade Design ◽  
Power Performance ◽  
Tidal Current Turbine ◽  
Current Turbine

Preliminary Results of a Vortex Method for Stand-Alone Vertical Axis Marine Current Turbine

2007 ◽  
Author(s):  
Ye Li ◽  
Sander M. Calisal
Keyword(s):  
Wind Turbine ◽  
Tidal Current ◽  
Vortex Method ◽  
Vertical Axis ◽  
Small Scale ◽  
Discrete Vortex ◽  
Analysis And Design ◽  
Tidal Turbine ◽  
Tidal Current Turbine ◽  
Current Turbine

Tidal power technology has been dwarfed once to take hold in the late 1970’s, because the early generations were expensive at small scale and some applications (such as barrages) had negative environmental impacts. In a similar working manner as a wind turbine, a tidal current turbine has been recognized as a promising ocean energy conversion device in the past two decades. However, the industrialization process is still slow. One of the important reasons is lack of comprehensive turbine hydrodynamics analysis which can not only predict turbine power but also assess impacts on the surrounding areas. Although a lot can be learned from the marine propeller or the wind turbine studies, a systematic hydrodynamics analysis on a vertical axis tidal current turbine has not been reported yet. In this paper, we employed vortex method to calculate the performance of stand-alone vertical axis tidal turbine in term of power efficiency, torque and forces. This method focuses on power prediction, hydrodynamics analysis and design, which can provide information for turbines distribution planning in a turbine farm and other related studies, which are presented in Li and Calisal (2007), a companion paper in the conference. In this method, discrete vortex method is the core for numerical calculation. Free vortex wake structure, nascent vortex and vortex decay mechanism are discussed in detail. Good agreements in turbine efficiency comparison are obtained with both the newly-designed tidal turbine test in a towing tank and early wind turbine test.

scholarly journals Prediction of Seabed Scour Induced by Full-Scale Darrieus-Type Tidal Current Turbine

2019 ◽  
Vol 7 (10) ◽  
pp. 342 ◽  
Author(s):  
Sun ◽  
Lam ◽  
Dai ◽  
Hamill
Keyword(s):  
Experimental Data ◽  
Numerical Model ◽  
Tidal Current ◽  
Full Scale ◽  
Scale Model ◽  
Small Scale ◽  
Scour Depth ◽  
Equilibrium Scour Depth ◽  
Tidal Current Turbine ◽  
Current Turbine

Scour induced by a Darrieus-type tidal current turbine was investigated by using a joint numerical and experimental method with emphasis on the scour process of a full-scale turbine. This work proposes a new numerical method to estimate turbine scour developments, followed by model validation through experimental data in the initial stage. The small-scale numerical model was further extended to a full-scale model for the prediction of turbine scour. The numerical model consists of (1) k-ω turbulence closure, (2) a sediment transport model, and (3) a sediment slide model. The transient-state model was coupled with a morphologic model to calculate scour development. A dynamic mesh updating technique was implemented, enabling the autoupdate of data for the grid nodes of the seabed at each time step. Comparisons between the numerical results and the experimental measurements showed that the proposed model was able to capture the main features of the scour process. However, the numerical model underestimated about 15%–20% of the equilibrium scour depth than experimental data. An investigation of the temporal and spatial development of seabed scour around a full-scale Darrieus-type tidal current turbine is demonstrated. This work concludes that the proposed numerical model can effectively predict the scour process of tidal current turbines, and the rotating rotor has a significant impact on the equilibrium scour depth for full-scale turbines.

Review on the blade design technologies of tidal current turbine

2016 ◽  
Vol 63 ◽  
pp. 414-422 ◽  
Author(s):  
Wei Li ◽  
Hongbin Zhou ◽  
Hongwei Liu ◽  
Yonggang Lin ◽  
Quankun Xu
Keyword(s):  
Tidal Current ◽  
Blade Design ◽  
Tidal Current Turbine ◽  
Current Turbine

Harvesting ocean energy with a small-scale tidal-current turbine and fish aggregating device in the Indonesian Archipelagos

2019 ◽  
Vol 35 ◽  
pp. 160-171 ◽  
Author(s):  
Hidemi Mutsuda ◽  
Shade Rahmawati ◽  
Naokazu Taniguchi ◽  
Takuji Nakashima ◽  
Yasuaki Doi
Keyword(s):  
Tidal Current ◽  
Small Scale ◽  
Ocean Energy ◽  
Tidal Current Turbine ◽  
Current Turbine

Tidal Current Turbine and Related Development Problems for Indonesia

2014 ◽  
Vol 575 ◽  
pp. 610-614 ◽  
Author(s):  
Ir. Darmawi
Keyword(s):  
Tidal Current ◽  
Field Research ◽  
Transmission System ◽  
Small Scale ◽  
Turbine Engine ◽  
Gear Transmission System ◽  
Related Development ◽  
Scale Field ◽  
Tidal Current Turbine ◽  
Current Turbine

Tidal Current Turbine will be an important device of renewable energy in the upcoming decades. Hydro energy, wind energy and solar energy will mostly utilized in Indonesia in order to fulfill the energy of remote villages and remote islands and optimizing the domestic energy availability. Regarding the small scale field research conducted in the year 2012 and 2013 in Indonesia, transmission system and low rpm alternator are encountered as a significant problems in order to develop the hydro and wind turbine engine. Both parts are not yet produced locally in Indonesia. Domestic production in step-up gear transmission system of ratio 1 : 30 to 1 : 60 and low rpm alternator will fundamentally required to gain creativity in the country.

Sign in / Sign up

Export Citation Format

Share Document