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Investigation of Moving Angle of Power Take off Mechanism on the Efficiency of Wave Energy Converter
H. T. Do(도황팅),M. T. Nguyen(누엔밍치),C. B. Phan(판콩빙),S. Y. Lee(이세영),H. G. Park(박형규),K. K. Ahn(안경관) 유공압건설기계학회 2015 드라이브·컨트롤 Vol.12 No.3
The hydraulic power-take-off mechanism (HPTO) is one of the most popular methods in wave energy converters (WECs). However, the conventional HPTO with only one direction motion has a number of drawbacks that limit its power capture capability. This paper proposes an adjustable moving angle wave energy converter (AMAWEC) and investigates the effect of the moving angle on the performance of the wave energy converter to find the optimal moving angle in order to increase the power capture capability as well as energy efficiency. A mathematical model of components from a floating buoy to a hydraulic motor was modeled. A small scale WEC test rig was fabricated to verify the power capture capability and efficiency of the proposed system through experiments.
Development of a Multi-Absorbing Wave Energy Converter using Pressure Coupling Principle
H. T. Do(도황팅),M. T. Nguyen(누엔밍치),C.B. Phan(판콩빙),S.Y. Lee(이세영),H. G. Park(박형규),K. K. Ahn(안경관) 유공압건설기계학회 2014 드라이브·컨트롤 Vol.11 No.3
This paper proposes a multi absorbing wave energy converter design, in which a hydrostatic transmission is used to transfer wave energy to electric energy. The most important feature of this system is its combination of the pressure coupling principle with the use of a hydraulic accumulator to eliminate the effects of wave power fluctuation; this maintains a constant speed of the hydraulic motor. Tilt motion of a floating buoy was employed as the power take-off mechanism. Furthermore, a PID controller was designed to carry out the speed control of the hydraulic motor. The design offers some advantages such as extending the life of the hydraulic components, increasing the amount of energy harvested, and stabilizing the output speed.
A Multi-absorbing Wave Energy Converter using Cylinders and Pressure coupling Principle
H.T. Do(도황팅),M.T. Nguyen(누엔밍치),C.B. Phan(판콩빙),H.G. Park(박형규),K.K. Ahn(안경관) 유공압건설기계학회 2014 유공압건설기계학회 학술대회논문집 Vol.2014 No.4
This paper proposes a multi absorbing wave energy converter design in which a hydrostatic transmission is used to transfer wave energy to electric energy. The most important feature of this system is its combination of the pressure coupling principle and the use of a hydraulic accumulator to eliminate the effects of wave power fluctuation and thereby to maintain a constant speed of the hydraulic motor. Tilt motion of a floating buoy was employed as the power take-off mechanism. A PID controller was designed to carry out speed control of the hydraulic motor. The design gives some advantages, such as extending the life of the hydraulic components, increasing the amount of energy harvested and stabilizing the output speed.