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

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.

scholarly journals The Analysis of Tidal Current in Suramadu Bridge Pier for Marine Power Generation Test Site

Jurnal Segara ◽  
2018 ◽  
Vol 14 (2) ◽  
Author(s):  
R. Bambang Adhitya Nugraha ◽  
Erwandi Erwandi ◽  
Hendry Syahputra ◽  
La Ode Nurman Mbay
Keyword(s):  
Numerical Model ◽  
Tidal Current ◽  
Bottom Topography ◽  
Specific Area ◽  
Test Site ◽  
General Information ◽  
Ocean Energy ◽  
Area Of Interest ◽  
Tidal Current Turbine ◽  
Current Turbine

Recently, the interest in renewable ocean energy has been
growing rapidly among the ocean researchers in Indonesia. In
this paper, the pattern of tidal current in Madura Strait was analyzed and it is used as First
we present the general information of the structure of
Suramadu Bridge and explain the purpose of installing tidal current turbine between its piers. Second, we develop the numerical model of Madura Strait. The bottom topography of Madura Strait is digitized from bathymetry map produced by Indonesian Navy. A nested hydrodynamic model has been developed to refine the specific area of interest around the piles of the Suramadu Bridge. MIKE-21 program is then employed to simulate the tidal current that passes between the piles of the bridge. Next, we validate the model by conducting the field measurement of the speed of tidal current between pile no. 56 and pile no. 57. We deployed ADCP and measured the current speed for 15 days. The obtained data is then compared with the numerical model. The results show that the simulated currents has similar pattern with the measured data. We also discuss the characteristics of the simulated tidal current comparing with the ADCP results. Finally we estimate the possible produced power produced from the kinetic energy of the predicted tidal current of hydrodynamic.

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.

Structural Dynamic Analysis of a Tidal Current Turbine Using MBDyn

2018 ◽  
Author(s):  
Jun Leng ◽  
Ye Li
Keyword(s):  
Tidal Current ◽  
Interaction Analysis ◽  
Vertical Axis ◽  
Internal Force ◽  
Mode Shapes ◽  
Structural Dynamic ◽  
Tidal Current Energy ◽  
Integrated Simulation ◽  
Tidal Current Turbine ◽  
Current Turbine

In recent years, tidal current energy has gained wide attention for its abundant resource and environmentally friendly production. This study focuses on analyzing dynamic behavior of a three-bladed vertical axis tidal current turbine. The multibody dynamics code MBDyn is used in the numerical simulation. It performs the integrated simulation and analysis of nonlinear mechanical, aeroelastic, hydraulic and control problems by numerical integration. In this study, tidal current turbine is idealized as an assembly of flexible beams including axis of rotation, arms and blades. We firstly conduct a modal analysis on the tidal current turbine and validate the model with the results obtained by ANSYS. The natural frequencies of blades with different size parameters are compared and the corresponding mode shapes are presented. Next, a parametric study was performed to investigate the effect of internal force on the dynamic response. It is concluded that the proposed method is accurate and efficient for structural analysis of tidal current turbine and this flexible multibody model can be used in the fluid-structure-interaction analysis in the future.

Experimental investigation of the wake of a horizontal axis tidal current turbine by LDV

2015 ◽  
pp. 601-612
Author(s):  
B Morandi ◽  
F Di Felice ◽  
M Costanzo ◽  
G Romano ◽  
D Dhomé ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Tidal Current ◽  
Horizontal Axis ◽  
Tidal Current Turbine ◽  
Current Turbine

scholarly journals Sustainable Power Generation by Tidal Current Turbine in Straits of Malacca

2018 ◽  
Vol 198 ◽  
pp. 04004
Author(s):  
P. T. Ghazvinei ◽  
H.H. Darvishi ◽  
A. Bhatia
Keyword(s):  
Tidal Current ◽  
Energy Resource ◽  
Flow Characteristics ◽  
Tidal Power ◽  
Tropical Country ◽  
Marine Current ◽  
Tidal Current Turbine ◽  
Straits Of Malacca ◽  
Sustainable Power ◽  
Current Turbine

Marine current power is a significant energy resource which is yet to be exploited for efficient energy production. Malaysia, being a tropical country is rich in renewable sources and tidal power is one of them. In Malaysia, Straits of Malacca is a potential site to establish a tidal current turbine. In the current study, the potential sites of the Straits of Malacca are discussed. A detailed review about the generator suitable for the Straits of Malacca with the associated challenges has also been discussed. Furthermore, the suitable solution for such challenges is proposed. The role of simulation in choosing an appropriate site and generator has also been reviewed. The focus of the study is to propose a generator suitable for the flow characteristics of the Straits of Malacca.

Sign in / Sign up

Export Citation Format

Share Document