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Study on Performance of savonius rotor Type Wave Energy Converter Used in Conjunction with Floating Breakwater

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China Ocean Engineering 2021年第4期35卷 578-587页

作者： LIU Zuo-shi GONG Kai HUANG Fang-ping HUANG Yan-chen School of Mechanical and Electrical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China Ningbo Institute of Technology Zhejiang UniversityNingbo 315100China School of Mechanical Engineering Zhejiang UniversityHangzhou 310027China

In the present study,the performance characteristics of a savonius rotor type wave energy converter used in conjunction with a conventional double-buoy floating breakwater is investigated using physical model *** savonius rotor type converter is suspended under the double-buoy floating breakwater to achieve wave attenuation while generating electricity,thereby enhancing the overall wave-elimination effect of the *** savonius rotor is tested with different water submergence depths,and a reasonable relative submergence depth is determined within the scope of the research *** hydrodynamics and energy capture performance of the combined breakwater with four different sizes of savonius rotor under different wave conditions are studied,and the transmission coefficient of the experimental device is *** results show that when the optimal relative submergence depth is 0.65D,where D is the impeller diameter,there is a correspondence between the optimal performance of savonius rotor with different rotor sizes and the wave period and wave *** optimal energy capture efficiency of the wave energy converter reaches 17%−20.5%,and the transmission coefficient is reduced by 35%−45%compared with the conventional double-buoy breakwater.

关键词： floating breakwater savonius rotor energy capture efficiency transmission coefficient

Experimental Research on A New Type of Floating Breakwater for Wave-Absorbing and Energy-Capturing

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China Ocean Engineering 2020年第6期34卷 817-827页

作者： HUANG Fang-ping GONG Kai LIU Zuo-shi CHEN Jun-hua HUANG Yan-chen School of Mechanical Engineering Zhejiang UniversityHangzhou 310027China Ningbo Institute of Technology Zhejiang UniversityNingbo 315100China School of Mechanical and Electrical Engineering Jiangxi University of Science and TechnologyGanzhouChina

To avoid the damage caused by big wind and wave in cage culture, and to solve the problem of energy supply faced by automatic breeding equipment, a new type of floating breakwater, named as savonius double buoy breakwater(SDBB), is proposed in the paper. The floating breakwater is composed of HDPE cylindrical double buoys and horizontal axis savonius rotors, and has the functions of wave-absorbing and energy-capturing. Based on the linear wave theory and energy conservation law, the Fourier Transform was applied to separate the two-dimensional wave frequency domain, and the energy captured by the rotors and absorbed by the floating breakwater were *** were conducted in a two-dimensional wave-making flume, and the transmitted waves at different wave heights and periods, the tension of mooring lines, and the rotational torque exerted on the savonius rotor were measured. A series of performance comparison tests were also performed on the new floating breakwater and the traditional double-floating breakwater. Results show that the new floating breakwater is better than the traditional one in terms of reducing wave transmittance, and the combination of the floating breakwater with savonius rotors can provide for marine aquaculture equipments with green power supply to a certain degree of self-sufficiency.

关键词： floating breakwater savonius rotor transmission coefficient wave energy capturing mooring force

Effect of partial blockage of air duct outlet on performance of OWC device

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Journal of Central South University 2012年第3期19卷 748-754页

作者： S.Patel K.Ram M.Rafiuddin Ahmed Renewable Energy Research Group University of the South Pacific

The use of a savonius rotor as turbine for an oscillating water column(OWC) is *** effect of tuning the OWC using turbine duct blockage is also studied for different wave conditions.A horizontal turbine section OWC employing a savonius rotor was tested by varying the opening of OWC exit(0%,25%,50%,75% and 100%) to study the behavior and performance of the *** OWC model was tested at water depth of 0.29 m at frequencies of 0.8,0.9 and 1.0 Hz while the exit openings are *** static pressure,dynamic pressure,rotational speed of the savonius rotor and the coefficient of power are presented as *** OWC with exit opening of 25% showed greater performance in terms of rotational speed and CP compared to OWC with other exit opening *** proves the ability of the OWC to be tuned by regulating flow in the turbine duct.

关键词： oscillating water column wave energy converter wells turbine impulse turbine savonius rotor