scholarly journals A PROPOSAL FOR WAVE ENERGY CONVERSION NEAR CAPE TOWN

1982 ◽  
Vol 1 (18) ◽  
pp. 16
Author(s):  
G. De F Retief ◽  
G.K. Prestedge ◽  
F.P.J. Muller
Keyword(s):  
Energy Conversion ◽  
Wave Energy ◽  
Three Dimensional ◽  
Cost Effective ◽  
Western Coast ◽  
Wave Energy Conversion ◽  
The South ◽  
Temporal And Spatial Distribution ◽  
Local Conditions ◽  
Coast Line

The South African wave energy program has been underway for several years and has included an analysis of the temporal and spatial distribution of wave energy along the full coast-line, determination of energy attenuation perpendicular to the coast-line at a site on the south western coast, and the development of a wave energy converter which is most suited to local conditions and requirements. The resource analysis has shown that the inshore power levels occurring along the south western coast are as promising as any elsewhere in the world. A bottom mounted, V-shaped wave energy conversion device driving an air turbine has been found to be most suited to prevailing conditions. The conversion characteristics of the device are presented, based on 1:100 scale three dimensional and 1:50 scale two dimensional model studies. Preliminary design studies of the proposed conversion system have underlined its potential viability as a cost effective supplementary source of power.

Maximum Wave Energy Conversion by Two Interconnected Floaters

2016 ◽  
Vol 138 (3) ◽  
Author(s):  
Siming Zheng ◽  
Yongliang Zhang ◽  
Wanan Sheng
Keyword(s):  
Energy Conversion ◽  
Wave Energy ◽  
Three Dimensional ◽  
Diffraction Theory ◽  
Rotary Inertia ◽  
Wave Radiation ◽  
Published Data ◽  
Wave Energy Conversion ◽  
Motion Constraints ◽  
Power Capture

Interconnected floaters could use relative rotations around connection joints to drive a power take-off (PTO) system, such that the ocean wave energy can be converted into a useful energy. In this paper, our attention is on the PTO optimization for the interconnected floaters. A fully linear dynamic system, including the linear hydrodynamics of the interconnected floaters and a linear PTO system, is considered. Under assumptions of linear theory, we present a mathematical model for evaluating the maximum wave energy conversion of two interconnected floaters based on the three-dimensional wave radiation–diffraction theory. The model is validated by comparison of the present results with the published data, and there is a good agreement. The model can be employed to calculate the maximum power absorbed by the interconnected floaters under motion constraints due to the restraints of pump stroke or/and collision problem between the floaters. The influence of wave frequency, PTO system, floater rotary inertia radius, and motion constraints on the power capture capability of the two interconnected floaters is also examined. It can be concluded that enlarging the rotary inertia of each floater by using mass nonuniform distribution can be seen as an alternative way of adding PTO inertia. The maximum relative power capture width of the two interconnected floaters with optimized PTO system under constraints is much smaller than that without any motion constraints for long waves.

Study on the capture spectrum of wave energy conversion

2021 ◽  
Vol 111 ◽  
pp. 102654
Author(s):  
Zhi Han ◽  
Feifei Cao ◽  
Martyn Hann ◽  
Haoxiang Gong ◽  
Shangze Liu ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Wave Energy ◽  
Wave Energy Conversion
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