scholarly journals Hydrodynamic Model and Tidal Current Energy Potential in Lepar Strait, Indonesia

2021 ◽  
Vol 11 (1) ◽  
pp. 15-25
Author(s):  
Harman Ajiwibowo ◽  
Munawir Bintang Pratama
Keyword(s):  
Tidal Current ◽  
Domain Decomposition Method ◽  
Future Research ◽  
Energy Potential ◽  
Mean Velocity ◽  
Tidal Current Energy ◽  
Area Of Interest ◽  
The Impact ◽  
Narrow Gaps ◽  
Current Energy

Previous studies have shown the abundance of tidal energy resources in Indonesia. However, some sites have yet to be considered. The Lepar Strait, for example, is located between Bangka and Lepar Islands. This paper describes a field survey and numerical modelling conducted in the Lepar Strait. The modelling was performed using Delft3D, with the aim of determining potential sites for harvesting tidal current energy and estimate the generated power. In the modelling, the domain decomposition method was employed for model downscaling, allowing grid resolution reaching 130 x 130 m2, which is sufficient to represent the narrow gaps between tiny islands in the area of interest. The National Bathymetric (Batnas) from the Geospatial Information Agency (BIG) and the International Hydrographic Organization (IHO) tide constituents were applied for the bathymetry and tide elevation boundaries. The comparison between the surveyed and modelled data showed a good agreement. The RMSE and r for water level are > 0.95 and < 0.15, and the RMSE for velocity was <0.19. Furthermore, an energetic flow reaching 1.5 m/s was found at the Northern part of Lepar Strait, situated at the narrow gaps. The Gorlov Helical Turbine was selected in this study due to shallow water and low mean velocity. In the 2019 model, the power density and power output at the best potential sites were 2,436.94 kWh/m2 and 1,870.41 kWh, respectively. This number is higher than those previously found in Kelabat Bay. Nonetheless, it is still far below the currently promising project in Larantuka and Lombok Straits. Future research is recommended, to conduct a detailed field measurement campaign and assess the impact of energy extraction in more detail.

Tidal current energy potential assessment in the Avilés Port using a three-dimensional CFD method

2019 ◽  
Vol 21 (6) ◽  
pp. 1367-1380 ◽  
Author(s):  
Rodolfo Espina-Valdés ◽  
Eduardo Álvarez Álvarez ◽  
Julio García-Maribona ◽  
Antonio José Gutiérrez Trashorras ◽  
Juan M. González-Caballín
Keyword(s):  
Tidal Current ◽  
Three Dimensional ◽  
Energy Potential ◽  
Tidal Current Energy ◽  
Cfd Method ◽  
Current Energy

scholarly journals Tidal current energy potential of Nalón river estuary assessment using a high precision flow model

2018 ◽  
Vol 8 (1) ◽  
pp. 118-123
Author(s):  
Nicolás Badano ◽  
Rodolfo Espina Valdés ◽  
Eduardo Álvarez Álvarez
Keyword(s):  
High Precision ◽  
Hydrodynamic Model ◽  
Tidal Current ◽  
Flow Model ◽  
River Estuary ◽  
River Mouth ◽  
Hydrodynamic Models ◽  
Energy Potential ◽  
Tidal Current Energy ◽  
Current Energy

Abstract Obtaining energy from tide currents in onshore locations is of great interest due to the proximity to the points of consumption. This opens the door to the feasibility of new installations based on hydrokinetic microturbines even in zones of moderate speed. In this context, the accuracy of energy predictions based on hydrodynamic models is of paramount importance. This research presents a high precision methodology based on a multidimensional hydrodynamic model that is used to study the energetic potential in estuaries. Moreover, it is able to estimate the flow variations caused by microturbine installations. The paper also shows the results obtained from the application of the methodology in a study of the Nalón river mouth (Asturias, Spain).

Tidal current energy potential assessment by a two dimensional computational fluid dynamics model: The case of Avilés port (Spain)

2016 ◽  
Vol 119 ◽  
pp. 239-245 ◽  
Author(s):  
Juan Manuel González-Caballín ◽  
Eduardo Álvarez ◽  
Antonio José Guttiérrez-Trashorras ◽  
Antonio Navarro-Manso ◽  
Joaquín Fernández ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Tidal Current ◽  
Two Dimensional ◽  
Dynamics Model ◽  
Energy Potential ◽  
Tidal Current Energy ◽  
Computational Fluid Dynamics Model ◽  
Current Energy

scholarly journals Tidal Current Energy for Indian Coastal Lines – A State Art of Review

2020 ◽  
Vol 1716 ◽  
pp. 012008
Author(s):  
P Vyshnavi ◽  
Nithya Venkatesan ◽  
A. Samad ◽  
E.J. Avital
Keyword(s):  
Tidal Current ◽  
Tidal Current Energy ◽  
Current Energy

scholarly journals An FTC Design via Multiple SOGIs with Suppression of Harmonic Disturbances for Five-Phase PMSG-Based Tidal Current Applications

2021 ◽  
Vol 9 (6) ◽  
pp. 574
Author(s):  
Zhuo Liu ◽  
Tianhao Tang ◽  
Azeddine Houari ◽  
Mohamed Machmoum ◽  
Mohamed Fouad Benkhoris
Keyword(s):  
Fault Tolerance ◽  
Energy Conversion ◽  
Tidal Current ◽  
Fault Tolerant ◽  
Tidal Current Energy ◽  
Electromagnetic Forces ◽  
Model Free ◽  
Energy Conversion Systems ◽  
Power Scale ◽  
Current Energy

This paper firstly adopts a fault accommodation structure, a five-phase permanent magnet synchronous generator (PMSG) with trapezoidal back-electromagnetic forces, in order to enhance the fault tolerance of tidal current energy conversion systems. Meanwhile, a fault-tolerant control (FTC) method is proposed using multiple second-order generalized integrators (multiple SOGIs) to further improve the systematic fault tolerance. Then, additional harmonic disturbances from phase current or back-electromagnetic forces in original and Park’s frames are characterized under a single-phase open condition. Relying on a classical field-oriented vector control scheme, fault-tolerant composite controllers are then reconfigured using multiple SOGIs by compensating q-axis control commands. Finally, a real power-scale simulation setup with a gearless back-to-back tidal current energy conversion chain and a small power-scale laboratory prototype in machine side are established to comprehensively validate feasibility and fault tolerance of the proposed method. Simulation results show that the proposed method is able to suppress the main harmonic disturbances and maintain a satisfactory fault tolerance when third harmonic flux varies. Experimental results reveal that the proposed model-free fault-tolerant design is simple to implement, which contributes to better fault-tolerant behaviors, higher power quality and lower copper losses. The main advantage of the multiple SOGIs lies in convenient online implementation and efficient multi-harmonic extractions, without considering system’s model parameters. The proposed FTC design provides a model-free fault-tolerant solution to the energy harvested process of actual tidal current energy conversion systems under different working conditions.

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