scholarly journals HORIZONTAL AXIS MARINE CURRENT TURBINE DESIGN FOR WIND-ELECTRIC HYBRID SAILING BOAT

Brodogradnja ◽  
2017 ◽  
Vol 68 (2) ◽  
pp. 127-151
Author(s):  
Serkan Ekinci ◽  
Mustafa Alvar
Keyword(s):  
Horizontal Axis ◽  
Marine Current Turbine ◽  
Marine Current ◽  
Turbine Design ◽  
Sailing Boat ◽  
Current Turbine

Augmented Diffuser for Horizontal Axis Marine Current Turbine

2016 ◽  
Vol 7 (1) ◽  
pp. 235 ◽  
Author(s):  
Aly Hassan Elbatran ◽  
Omar Yaakob ◽  
Yasser Ahmed ◽  
Firdaus Abdallah
Keyword(s):  
Tidal Current ◽  
Renewable Energy Sources ◽  
Research Work ◽  
Horizontal Axis ◽  
Offshore Wind ◽  
Water Current ◽  
Maximum Efficiency ◽  
Marine Current Turbine ◽  
Marine Current ◽  
Current Turbine

<span>The potential of renewable energy sources is enormous as they can make a major contribution to the future of energy needs. The ocean has a great potential to become a practical and predictable energy source compared to other energy resources such as solar, wind, and nuclear. It offers different sources of energy which can be utilized namely wave, tidal, offshore wind, thermal, and tidal current. Among these sources, marine tidal current has major advantages such as higher power availability and predictability. The main objective of this research work is to design and develop a horizontal axis marine current turbine (HAMCT) that suitable for operating within Malaysian ocean, which has low speed current (0.5 – 1 m/s average). A prototype of augmented diffuser 4-bladed HAMCT applying NACA 0014 was proposed in the current study. The turbine model has 0.666 m diameter, and it was designed to produce as much as power from flowing water current. Model was constructed and tested at Marine Technology Center (MTC) in three conditions, namely, free tow testing, ducted tow testing, and ducted diffuser tow testing in order to predict the power and efficiency of the turbine system. The results showed that the application of duct was significant to concentrate the flow and diffuser arrangement was effective when it was placed behind of the rotor in this condition of low water current speed. The maximum efficiency Cp obtained in the current system was 0.58.</span>

Hydrodynamic Analysis of a Horizontal Axis Marine Current Turbine With a Boundary Element Method

2008 ◽  
Author(s):  
J. Baltazar ◽  
J. A. C. Falca˜o de Campos
Keyword(s):  
Horizontal Axis ◽  
Model Parameters ◽  
Viscous Effects ◽  
Pressure Distributions ◽  
Marine Current Turbine ◽  
Wide Range ◽  
Marine Current ◽  
Line Theory ◽  
Wake Model ◽  
Current Turbine

A low order potential based panel code is used to analyse the flow around the blades of a horizontal axis marine current turbine. An empirical vortex model is assumed for the turbine wake which includes the variation of pitch of the helicoidal vortices trailing behind the blades. The analysis is carried out for uniform inflow conditions in steady flow for a turbine with controllable pitch for two different pitch settings in a wide range of tip-speed-ratios. Grid convergence studies carried out to verify the accuracy of predicted pressure distributions and integrated forces show a fast convergence with grid refinement for this geometry. The effect of the helicoidal wake model parameters used in the analysis is found to have a strong influence in the performance curves. The results are compared with experimental data from the literature and with the lifting line theory. A discussion of viscous effects is also provided to help explaining the main discrepancies with the data.

Sign in / Sign up

Export Citation Format

Share Document